Si3As4 — Properties & Data | MatWorld

Si3As4

ceramic

· Si3As4

Si₃As₄ is a ceramic compound in the silicon arsenide family, representing an intermetallic ceramic combining silicon with arsenic. This material exists primarily in research and development contexts rather than established industrial production, as it belongs to a class of refractory ceramics being investigated for high-temperature structural applications where conventional oxides reach their limits.

high-temperature structural ceramicsrefractory applicationssemiconductor processing equipmentthermal management systemsresearch materialsextreme environment composites

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	59.47	GPa	DFT · OptB88vdW
↳	59.04	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.3118	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2300	-	DFT · OptB88vdW
↳	0.2298	-	DFT · PBE
Shear Modulus(G)2 entries	41.26	GPa	DFT · OptB88vdW
↳	38.92	GPa	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)	4.095	kg/m³	DFT · OptB88vdW

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.5220	eV	DFT · OptB88vdW
↳	0.9380	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	17.40	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	16.93	-	DFT · OptB88vdW
↳	12.39	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.03015	C/m²	DFT · OptB88vdW
↳	0.1968	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	31.28	%	DFT · TBmBJ

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)	0.05190	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.00300	eV/atom	DFT · OptB88vdW

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

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Si3As4

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