{ "spore": "profile", "id": "nickel-zinc-ferrite", "spore_version": "0.2", "family": "ferrite", "name": "Nickel-zinc ferrite (Fair-Rite 43 Material, EMI suppression)", "abbreviation": "NiZn", "role": "EMI suppressor", "category": "shielding", "type": "spot-shields", "summary": "Fair-Rite 43 Material is a nickel-zinc spinel ferrite, a sintered ceramic, used to suppress conducted electromagnetic interference on cables and in high-frequency common-mode chokes. Fair-Rite gives an initial permeability of 800 and a Curie temperature above 130 °C for this grade, and its supplier safety data sheet gives a specific gravity of 4.8 g/cm3. No space-flight, radiation or vacuum data for this grade were found in the sources read for this profile.\n", "best_for": "Suppressing conducted EMI on cables and wiring from 20 MHz to 250 MHz", "weakest_at": "Permeability changes by 1.25 %/°C over 20 to 70 °C (datasheet), and no space test data were found", "identity": { "formula": "Nickel-zinc spinel ferrite; nominal oxide composition 65 wt% Fe2O3, 21 wt% ZnO, 10 wt% NiO and 4 wt% CuO (Fair-Rite 43 Material Grade, RoHS composition sheet)", "cas": "12645-50-0", "designations": [ { "system": "Trade name", "code": "43 Material", "source": "fair-rite-43-datasheet", "where": "Page title and heading: 43 Material Data Sheet" } ], "source": "fair-rite-43-sds", "where": "CAS Number printed in SDS section 1 (product code); material named as Nickel Zinc Spinel Ferrite in section 3" }, "tags": { "environments": [], "stresses": [], "applications": [ "electronics-and-chips" ] }, "properties": [ { "benchmark": "initial_permeability", "label": "Initial permeability (magnetic, dimensionless as printed)", "value": 800, "bound": "exact", "unit": "-", "scope": "material", "conditions": { "field": "B below 10 gauss", "test": "standard toroids 18/10/6 mm at 25 degC and 10 kHz unless otherwise indicated (data sheet footnote)" }, "method": "Value in the 43 Material characteristics table, measured by the manufacturer", "status": "ground", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, row 'Initial Permeability @ B < 10 gauss'", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "flux_density_at_field", "label": "Flux density B at field strength H", "value": 3500, "bound": "exact", "unit": "gauss", "scope": "material", "conditions": { "field_strength": "10 oersted", "test": "standard toroids 18/10/6 mm at 25 degC and 10 kHz unless otherwise indicated (data sheet footnote)" }, "method": "Value in the 43 Material characteristics table", "status": "ground", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, row 'Flux Density @ Field Strength' (B 3500 gauss at H 10 oersted)", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "residual_flux_density", "label": "Residual flux density Br", "value": 2200, "bound": "exact", "unit": "gauss", "scope": "material", "conditions": { "basis": "value as printed; the table row gives no temperature or field beyond the table footnote (25 degC, standard toroid)" }, "method": "Value in the 43 Material characteristics table", "status": "ground", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, row 'Residual Flux Density' (Br)", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "coercive_force", "label": "Coercive force Hc", "value": 0.36, "bound": "exact", "unit": "oersted", "scope": "material", "conditions": { "basis": "value as printed; the table row gives no temperature or field beyond the table footnote (25 degC, standard toroid)" }, "method": "Value in the 43 Material characteristics table", "status": "ground", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, row 'Coercive Force' (Hc)", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "magnetic_loss_factor", "label": "Magnetic loss factor (tan delta / initial permeability)", "value": 100, "bound": "exact", "unit": "10^-6", "scope": "material", "conditions": { "frequency": "1.0 MHz" }, "method": "Value in the 43 Material characteristics table; printed as 100 at 1.0 MHz with the unit 10^-6 and MHz in the table", "status": "ground", "note": "The table prints the loss factor as tan delta over mu-i in units of 10^-6 at the frequency MHz. It is a magnetic loss factor, not the dielectric dissipation factor in the canonical list.", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, row 'Loss Factor @ Frequency'", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "temperature_coefficient_permeability", "label": "Temperature coefficient of initial permeability", "value": 1.25, "bound": "exact", "unit": "%/°C", "scope": "material", "conditions": { "temperature_range": "20 to 70 °C" }, "method": "Value in the 43 Material characteristics table", "status": "ground", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, row 'Temperature Coefficient of Initial Permeability (20 -70°C)'", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "curie_temperature", "label": "Curie temperature", "value": 130, "bound": "lower", "unit": "°C", "scope": "material", "conditions": { "basis": "printed as '>130' in the table; the value is a lower bound, not a measured Curie point" }, "method": "Value in the 43 Material characteristics table", "status": "ground", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, row 'Curie Temperature' (Tc)", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "conducted_emi_frequency_range", "label": "Frequency range for conducted EMI suppression", "value": 20, "value_high": 250, "bound": "exact", "unit": "MHz", "scope": "material", "conditions": { "application": "suppression of conducted EMI on cables and wiring" }, "method": "Range stated in the 43 Material data sheet introduction", "status": "ground", "source": "fair-rite-43-datasheet", "where": "43 Material Data Sheet, introduction paragraph ('suppression of conducted EMI from 20 MHz to 250 MHz')", "source_detail": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" } }, { "benchmark": "boiling_point", "label": "Boiling point (upper bound, as printed in the SDS)", "value": 2500, "bound": "upper", "unit": "°F", "scope": "material", "conditions": { "basis": "printed as '< 2500 °F' in the SDS; an upper bound, not a measured boiling point", "form": "sintered component, 43 Material Grade" }, "method": "Value printed in the supplier SDS, section 9", "status": "ground", "note": "The SDS gives the boiling point only as an upper bound. No measured boiling point for this grade was found.", "source": "fair-rite-43-sds", "where": "Section 9, Physical and Chemical Properties, row 'Boiling Point'", "source_detail": { "title": "Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.)", "id": "CAS 12645-50-0; prepared 05/20/2015 (SDS section 16)", "url": "https://fair-rite.com/wp-content/uploads/2016/03/SDS-43-Component.pdf", "year": 2015, "kind": "datasheet", "license": "Supplier document, linked not reproduced" } }, { "benchmark": "complex_permeability_real_part", "label": "Real part of complex permeability at 1 MHz (CSV column headed µs', the leading Greek letter is garbled in the download)", "value": 851.3550816, "bound": "exact", "unit": "-", "scope": "material", "conditions": { "frequency": "1000000 Hz (1 MHz)", "equipment": "named in the CSV header (HP4284A with 16047E fixture, and E4991A with 16454A fixture)" }, "method": "Value in the 43 Material complex permeability CSV, row Frequency(Hz) 1000000", "status": "ground", "source": "fair-rite-43-csv", "where": "43-Material-publish.csv, row '1000000' (first data column after frequency)", "source_detail": { "title": "43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite Products Corp.)", "id": "43-Material-publish.csv; file header dated Feb-20", "url": "https://fair-rite.com/wp-content/uploads/2020/11/43-Material-publish.csv", "year": 2020, "kind": "datasheet", "license": "Manufacturer data file, linked not reproduced" } }, { "benchmark": "complex_permeability_imaginary_part", "label": "Imaginary part of complex permeability at 1 MHz (CSV column headed µs'', the leading Greek letter is garbled in the download)", "value": 48, "bound": "exact", "unit": "-", "scope": "material", "conditions": { "frequency": "1000000 Hz (1 MHz)", "equipment": "named in the CSV header (HP4284A with 16047E fixture, and E4991A with 16454A fixture)" }, "method": "Value in the 43 Material complex permeability CSV, row Frequency(Hz) 1000000", "status": "ground", "source": "fair-rite-43-csv", "where": "43-Material-publish.csv, row '1000000' (second data column after frequency)", "source_detail": { "title": "43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite Products Corp.)", "id": "43-Material-publish.csv; file header dated Feb-20", "url": "https://fair-rite.com/wp-content/uploads/2020/11/43-Material-publish.csv", "year": 2020, "kind": "datasheet", "license": "Manufacturer data file, linked not reproduced" } }, { "benchmark": "density", "label": "Specific gravity of the 43 Material Grade component (printed as specific gravity)", "value": 4.8, "bound": "exact", "unit": "g/cm3", "scope": "material", "conditions": { "form": "sintered component, 43 Material Grade" }, "method": "Value printed in the supplier SDS, section 9", "status": "ground", "note": "Fair-Rite's generic Ferrite Material Constants block on its toroid product page prints about 4.7 g/cm3 (specific gravity, approximately) and states those constants are typical for Fair-Rite MnZn and NiZn ferrites. That figure is not specific to the 43 grade, so it is not used here. The two figures are recorded side by side for the reader.", "source": "fair-rite-43-sds", "where": "Section 9, Physical and Chemical Properties, row 'Specific Gravity'", "source_detail": { "title": "Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.)", "id": "CAS 12645-50-0; prepared 05/20/2015 (SDS section 16)", "url": "https://fair-rite.com/wp-content/uploads/2016/03/SDS-43-Component.pdf", "year": 2015, "kind": "datasheet", "license": "Supplier document, linked not reproduced" } } ], "corrosion": [ { "environment": "Water", "headline": "The supplier safety data sheet describes the sintered ferrite as insoluble in water and not reactive with water.", "effect": "The SDS lists solubility as insoluble and reactivity in water as none, and gives stability as stable and the material as inert. It gives no test data on humidity, ageing or chemical exposure.", "rating": "low", "conditions": { "material": "43 Material Grade sintered component", "test": "no test; supplier SDS statements only" }, "source": "fair-rite-43-sds", "where": "Section 9 (Solubility in Water; Reactivity in Water) and section 10 (Stability; Conditions to Avoid)" } ], "risks": { "hazards": [ { "text": "The supplier SDS lists no OSHA Hazard Communication classification and no physical or health hazards, marking each as N/A in section 2.", "ghs": [], "source": "fair-rite-43-sds", "where": "Section 2, Hazard Identification" }, { "text": "The SDS lists the composition as nickel compounds below 23 wt%, copper compounds below 8 wt% and zinc compounds below 23 wt%, and lists these as EPCRA Section 313 chemicals.", "ghs": [], "source": "fair-rite-43-sds", "where": "Section 3, Composition, and the Section 313 supplier notification" } ], "failure_risks": [ { "mode": "Permeability drifts with temperature", "trigger": "Operation across 20 to 70 °C", "consequence": "Initial permeability changes by 1.25 %/°C over that range, so the initial permeability shifts with temperature.", "severity": "low", "source": "fair-rite-43-datasheet", "where": "43 Material Characteristics table, temperature coefficient row" } ], "side_effects": [], "handling": [ { "text": "Wear safety glasses for eye protection (SDS section 8).", "source": "fair-rite-43-sds", "where": "Section 8, Eye Protection" }, { "text": "No respiratory protection or ventilation is required unless airborne dust is generated (SDS section 8).", "source": "fair-rite-43-sds", "where": "Section 8, Respiratory Protection and Ventilation" }, { "text": "Clean up spills by wiping off with a brush and cloth (SDS section 6).", "source": "fair-rite-43-sds", "where": "Section 6, Method for Cleaning up" }, { "text": "The SDS lists no precautions for handling and storage (SDS section 7).", "source": "fair-rite-43-sds", "where": "Section 7, Handling and Storage" } ], "mitigations": [] }, "uses": [ { "application": "electronics-and-chips", "device": "Cable EMI suppression cores and beads", "example": "Fair-Rite lists EMI suppression beads, beads on leads, round and flat cable EMI suppression cores and snap-on cores as products offered in 43 Material, for suppression of conducted EMI from 20 MHz to 250 MHz.", "source": "fair-rite-43-datasheet", "where": "43 Material Data Sheet page, opening paragraph and the product list" }, { "application": "electronics-and-chips", "device": "High-frequency common-mode choke", "example": "The data sheet says 43 Material is also used for inductive applications such as high frequency common-mode chokes.", "source": "fair-rite-43-datasheet", "where": "43 Material Data Sheet page, opening paragraph" } ], "supply": [ { "subject": "Nickel", "producers": [ { "country": "Indonesia", "share_percent": 66.7, "year": 2025 }, { "country": "Philippines", "share_percent": 6.9, "year": 2025 }, { "country": "Russia", "share_percent": 5.1, "year": 2025 }, { "country": "Canada", "share_percent": 3.6, "year": 2025 } ], "critical_lists": [ { "list": "USGS 2025 List of Critical Minerals (Nickel, used to make high-strength steel, and rechargeable batteries)", "listed": true } ], "recycling": "USGS: nickel recovered from scrap accounted for approximately 60% of apparent consumption in 2025.", "substitutes": [], "source": "usgs-mcs2026-nickel", "where": "World Mine Production and Reserves table, 2025e (world total 3,900,000 t; shares calculated by Space Mushroom against that world total); Recycling paragraph" }, { "subject": "Zinc", "producers": [ { "country": "China", "share_percent": 31.5, "year": 2025 }, { "country": "Peru", "share_percent": 11.5, "year": 2025 }, { "country": "Australia", "share_percent": 8.5, "year": 2025 } ], "critical_lists": [ { "list": "USGS 2025 List of Critical Minerals (Zinc, used as a coating to protect iron and steel from rust and corrosion)", "listed": true } ], "recycling": "USGS: refined zinc produced in the United States was recovered from secondary materials at both primary and secondary smelters (no percentage given).", "substitutes": [], "source": "usgs-mcs2026-zinc", "where": "World Mine Production and Reserves table, 2025e (world total 13,000 thousand t; shares calculated by Space Mushroom against that world total); Recycling paragraph" }, { "subject": "Iron", "producers": [ { "country": "Australia", "share_percent": 37.7, "year": 2025 }, { "country": "Brazil", "share_percent": 16.2, "year": 2025 }, { "country": "India", "share_percent": 11.9, "year": 2025 }, { "country": "China", "share_percent": 11.2, "year": 2025 } ], "critical_lists": [ { "list": "USGS 2025 List of Critical Minerals (iron is not a separate entry)", "listed": false } ], "recycling": "USGS iron ore chapter: 'Recycling: None.' It refers readers to the Iron and Steel Scrap chapter.", "substitutes": [], "source": "usgs-mcs2026-iron", "where": "World Mine Production table, usable ore, 2025e (world total 2,600,000 thousand t; shares calculated by Space Mushroom against that world total); Recycling line" } ], "media": [], "documents": [ { "title": "Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.)", "type": "sds", "url": "https://fair-rite.com/wp-content/uploads/2016/03/SDS-43-Component.pdf", "year": 2015 }, { "title": "43 Material Data Sheet (Fair-Rite)", "type": "datasheet", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026 }, { "title": "43 Material Grade Nominal Chemical Composition, Fair-Rite P/N 5943000301 (RoHS sheet)", "type": "datasheet", "url": "https://www.fair-rite.com/wp-content/ebiz/newfair/rohs/5943000301%20ROHS.pdf", "year": 2005 }, { "title": "USGS Mineral Commodity Summaries 2026: Nickel", "type": "report", "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-nickel.pdf", "year": 2026 }, { "title": "USGS Mineral Commodity Summaries 2026: Zinc", "type": "report", "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-zinc.pdf", "year": 2026 }, { "title": "USGS Mineral Commodity Summaries 2026: Iron Ore", "type": "report", "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-iron-ore.pdf", "year": 2026 }, { "title": "About the 2025 List of Critical Minerals (USGS)", "type": "report", "url": "https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals", "year": 2025 }, { "title": "43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite)", "type": "datasheet", "url": "https://fair-rite.com/wp-content/uploads/2020/11/43-Material-publish.csv", "year": 2020 } ], "gaps": [ "Saturation flux density (Bs) for the 43 grade: not printed on the 43 data sheet; only B at 10 oersted and residual flux density are given.", "Permeability versus frequency: only the 1 MHz row of the CSV (real and imaginary parts) is used as a property; the other rows are not profiled. Permeability versus temperature: no table or CSV for it was read.", "Benchmark names conducted_emi_frequency_range, complex_permeability_real_part and complex_permeability_imaginary_part are not in spores/property-canon.yaml, and initial_permeability is not there either. Use the canonical names once they are added.", "Specific heat (0.25 cal/g/°C), thermal conductivity (3.5 to 4.5 mW/cm-°C), linear expansion (8 to 10 x 10^-6 /°C), tensile and compressive strength, Young's modulus and Knoop hardness: printed only in Fair-Rite's generic Ferrite Material Constants block, which says it is typical for MnZn and NiZn ferrites, so none is listed as a 43 property.", "Operating and storage temperature for the 43 grade: Fair-Rite's Storage and Operating Conditions page gives limits by component category, not by grade (for example -55 to +125 °C for inductive/power parts with no coatings or conductors), and does not name the 43 grade.", "Behaviour above the Curie temperature (above 130 °C): no permeability-versus-temperature result in any source read for this profile, and the failure mode above Curie is not stated.", "Electrical resistivity of the 43 grade: the data sheet prints 1×10^5 ohm-cm, but in superscript form that the automated value check could not match in the source text, so the value is not kept as a property here. Re-enter it once the printed form is confirmed.", "Space environment: no vacuum, radiation, thermal-vacuum or flight result for NiZn ferrite cores found.", "Humidity and ageing: no humidity, heat-ageing or long-term test found; corrosion entry rests only on the supplier SDS statements.", "Crystal structure: the SDS names the material as a spinel ferrite, but no crystal-structure source was read, so no crystal system or space group is given.", "Copper supply (CuO, 4 wt%) is not profiled in this file.", "Failure modes (cracking, mechanical breakage) and mitigations: no sourced statement found.", "Comparison with MnZn ferrites: no MnZn grade was read in this run, so this profile does not compare the 43 grade with other ferrites in numbers." ], "story": { "why": "Fair-Rite 43 Material is a nickel-zinc spinel ferrite, a sintered ceramic core used to suppress conducted electromagnetic interference (EMI) on cables and in common-mode chokes. Fair-Rite describes it as its most popular ferrite for suppressing conducted EMI from 20 MHz to 250 MHz. The supplier data give it an initial permeability of 800 and a Curie temperature above 130 °C.", "uses": [ { "where": "Cable EMI suppression", "line": "Fair-Rite lists EMI suppression beads, beads on leads, round and flat cable EMI suppression cores and snap-on cores as products made in 43 Material, for suppression of conducted EMI from 20 MHz to 250 MHz." }, { "where": "High-frequency common-mode chokes", "line": "The 43 data sheet says the grade is also used for inductive applications such as high frequency common-mode chokes." }, { "where": "Electronics industry", "line": "The supplier SDS gives the product use as the electronics industry." } ], "can_do": [ { "label": "Initial permeability", "line": "Initial permeability is 800 for the 43 grade, measured on standard toroids at 25 degC and 10 kHz, per the Fair-Rite data sheet.", "benchmark": "initial_permeability", "scope": "material", "value": "800" }, { "label": "Curie temperature", "line": "The Curie temperature is printed as above 130 °C. The data sheet gives only the lower bound.", "benchmark": "curie_temperature", "scope": "material", "value": "above 130 °C" }, { "label": "Flux density", "line": "The data sheet prints a flux density of 3500 gauss at a field strength of 10 oersted for the 43 grade.", "benchmark": "flux_density_at_field", "scope": "material", "value": "3500 gauss" } ], "compare": "The 43 grade is a nickel-zinc ferrite for EMI suppression from 20 MHz to 250 MHz, with initial permeability 800 and Curie temperature above 130 °C. No MnZn grade was read in this run, so this profile does not compare the 43 grade with other ferrites in numbers. The compare table lists the 43 grade's own values for the three main magnetic and physical figures.", "compare_rows": [ { "label": "Initial permeability", "benchmark": "initial_permeability", "scope": "material" }, { "label": "Curie temperature", "benchmark": "curie_temperature", "scope": "material" }, { "label": "Specific gravity", "benchmark": "density", "scope": "material" } ], "handling": [ "The sintered component is not classified as hazardous by the supplier SDS. Wear safety glasses.", "Respiratory protection is needed only where airborne dust is generated.", "Clean spills by wiping off with a brush and cloth.", "Allow for the stated temperature coefficient of permeability (1.25 %/°C over 20 to 70 °C) when designing for temperature change." ], "good_for": [ "Suppressing conducted EMI on cables from 20 MHz to 250 MHz. The data sheet names this as its main use.", "High-frequency common-mode chokes, per the data sheet." ], "watch_out": [ "Permeability changes by 1.25 %/°C over 20 to 70 °C.", "No flux density at saturation is printed for the 43 grade, and the magnetization curves were not read in this run.", "No space, vacuum or radiation test data were found for this grade." ], "verdict": "The 43 grade has manufacturer data for its main magnetic figures and a supplier safety data sheet. Space-environment data are missing from every source read here.", "recipe": { "line": "Fair-Rite 43 Material is a nickel-zinc spinel ferrite. Its nominal composition is 65 wt% Fe2O3, 21 wt% ZnO, 10 wt% NiO and 4 wt% CuO, per Fair-Rite's RoHS composition sheet. The supplier SDS calls the part a sintered ceramic component.", "parts": [ { "name": "Iron oxide", "symbol": "Fe2O3", "role": "Main component by weight in the nominal composition.", "share_percent": 65 }, { "name": "Zinc oxide", "symbol": "ZnO", "role": "Zinc component of the nominal composition.", "share_percent": 21 }, { "name": "Nickel oxide", "symbol": "NiO", "role": "Nickel component of the nominal composition. The SDS names the material as nickel zinc spinel ferrite.", "share_percent": 10 }, { "name": "Copper oxide", "symbol": "CuO", "role": "Minor component of the nominal composition.", "share_percent": 4 } ] }, "risk_groups": [ { "title": "For people", "lead": "The supplier SDS lists no OSHA Hazard Communication classification and no physical or health hazard for the sintered component. Its toxicology and ecology entries are marked N/A.", "points": [ { "label": "The component", "line": "The SDS says the material is inert and insoluble in water, and lists no hazardous decomposition. It is a sintered ceramic part, not a powder." }, { "label": "Composition", "line": "The SDS lists nickel compounds below 23 wt%, copper compounds below 8 wt% and zinc compounds below 23 wt%, and notes them as EPCRA Section 313 chemicals." }, { "label": "Dust", "line": "Eye protection is safety glasses. Respiratory protection and ventilation are needed only where airborne dust is generated, per SDS section 8." } ], "level": 0, "verdict": "Not classified hazardous by the supplier" }, { "title": "In service", "lead": "The datasheet names cable EMI suppression and high-frequency common-mode chokes as uses of this grade.", "points": [ { "label": "Temperature", "line": "Initial permeability changes by 1.25 %/°C over 20 to 70 °C, per the 43 data sheet. The Curie temperature is printed as above 130 °C, and the sources read give no behaviour above that point." }, { "label": "Storage", "line": "The SDS lists no precautions for handling and storage." } ] } ] }, "updated": "2026-11-01", "review": { "status": "draft", "method": "assistant", "checked_values": 12, "unreachable": 0, "caveats": 2, "note": "Written by an AI assistant on 2026-11-01 from pages read in this run. 12 grade-specific values, 8 from the 43 data sheet and supplier SDS, plus the SDS boiling point (upper bound), the 20 to 250 MHz range from the data sheet, and the 1 MHz real and imaginary permeability from the 43 permeability CSV. The resistivity row stays out because its printed form (1×105) carries a lost superscript. Generic constants were left out. Density 4.8 g/cm3 (SDS) and about 4.7 g/cm3 (generic constants block) are recorded side by side." }, "sources": { "fair-rite-43-datasheet": { "title": "43 Material Data Sheet (Fair-Rite Products Corp.)", "id": "Fair-Rite 43 Material characteristics table", "url": "https://fair-rite.com/43-material-data-sheet/", "year": 2026, "kind": "datasheet", "license": "Manufacturer web page, cited not reproduced" }, "fair-rite-43-sds": { "title": "Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.)", "id": "CAS 12645-50-0; prepared 05/20/2015 (SDS section 16)", "url": "https://fair-rite.com/wp-content/uploads/2016/03/SDS-43-Component.pdf", "year": 2015, "kind": "datasheet", "license": "Supplier document, linked not reproduced" }, "fair-rite-43-rohs": { "title": "43 Material Grade Nominal Chemical Composition, Fair-Rite P/N 5943000301 (RoHS sheet)", "id": "Fair-Rite P/N 5943000301; RoHS conversion date 1/1/2005 printed on sheet", "url": "https://www.fair-rite.com/wp-content/ebiz/newfair/rohs/5943000301%20ROHS.pdf", "year": 2005, "kind": "datasheet", "license": "Manufacturer document, linked not reproduced" }, "fair-rite-43-csv": { "title": "43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite Products Corp.)", "id": "43-Material-publish.csv; file header dated Feb-20", "url": "https://fair-rite.com/wp-content/uploads/2020/11/43-Material-publish.csv", "year": 2020, "kind": "datasheet", "license": "Manufacturer data file, linked not reproduced" }, "usgs-mcs2026-nickel": { "title": "Mineral Commodity Summaries 2026: Nickel", "id": "USGS Mineral Commodity Summaries 2026", "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-nickel.pdf", "year": 2026, "kind": "report", "license": "public domain (USGS)" }, "usgs-mcs2026-zinc": { "title": "Mineral Commodity Summaries 2026: Zinc", "id": "USGS Mineral Commodity Summaries 2026", "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-zinc.pdf", "year": 2026, "kind": "report", "license": "public domain (USGS)" }, "usgs-mcs2026-iron": { "title": "Mineral Commodity Summaries 2026: Iron Ore", "id": "USGS Mineral Commodity Summaries 2026", "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-iron-ore.pdf", "year": 2026, "kind": "report", "license": "public domain (USGS)" }, "usgs-crit-2025": { "title": "About the 2025 List of Critical Minerals (USGS)", "id": "Final 2025 List of Critical Minerals", "url": "https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals", "year": 2025, "kind": "web", "license": "public domain (USGS)" } }, "license": "CC-BY-4.0", "url": "https://spacemushroom.com/profiles/nickel-zinc-ferrite/" }