Si3N2 — Properties & Data | MatWorld

Si3N2

ceramic

· JVASP-39526· Si3N2

Silicon nitride (Si₃N₂) is a high-performance structural ceramic compound known for exceptional hardness, thermal shock resistance, and mechanical strength at elevated temperatures. It is widely used in automotive engines (turbocharger rotors, cylinder liners), cutting tools, bearing components, and aerospace applications where thermal stability and wear resistance are critical; engineers select Si₃N₂ over traditional materials when weight reduction and operation in extreme thermal environments are priorities.

turbocharger componentsautomotive enginescutting tools and insertsbearing balls and racesaerospace thermal componentswear-resistant sliding surfaces

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	2.464	kg/m³	DFT · OptB88vdW

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

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.2660	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	6.530	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.05000	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.04000	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000996	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000597	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-165.1	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	100.9	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.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.2825	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.5537	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

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.

Si3N2

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental