FeSi2 — Properties & Data | MatWorld

FeSi2

Name: FeSi2
Brand: MatWorld

semiconductor

· FeSi2

Iron silicide (FeSi₂) is an intermetallic semiconductor compound that combines iron and silicon, belonging to the family of transition-metal silicides. It is primarily investigated for thermoelectric power generation and waste-heat recovery applications, where its semiconductor properties enable direct conversion of temperature gradients to electrical current. FeSi₂ is notable in this context because it offers good thermal stability, relatively low cost compared to traditional thermoelectric materials, and the ability to operate at moderate-to-high temperatures, making it attractive for automotive exhaust systems and industrial heat recovery where conventional materials may be cost-prohibitive or performance-limited.

thermoelectric generatorswaste heat recoveryautomotive exhaust systemshigh-temperature power generationintermetallic semiconductorsresearch-phase materials

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	26,202.5	ksi	DFT
↳	25,401.9	ksi	DFT · OptB88vdW
↳	26,202.5	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.02682	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2200	-	DFT · OptB88vdW
↳	0.2147	-	DFT · PBE
Shear Modulus(G)3 entries	18,463.9	ksi	DFT
↳	17,646.7	ksi	DFT · OptB88vdW
↳	18,463.9	ksi	DFT · PBE

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Density(ρ)	0.1761	lb/in³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	0.9000	eV	Measured
↳	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00251	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00215	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-43.94	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-41.27	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.2906	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

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RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

FeSi2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

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