SiOs — Properties & Data | MatWorld

SiOs

Name: SiOs
Brand: MatWorld

ceramic

· SiOs

SiOs is a silicon oxide ceramic compound with a complex crystal structure and moderate to high stiffness, belonging to the broader family of silicate ceramics. While the exact stoichiometry and phase composition are not specified, materials in this family are valued for their chemical inertness, thermal stability, and hardness across demanding applications. Silicon oxide ceramics are widely employed in structural and functional roles where corrosion resistance, high-temperature performance, or wear resistance is critical, though their brittleness typically limits use to compression-dominated or protected loading scenarios.

refractory liningssemiconductor processing equipmentwear-resistant coatingsthermal insulation componentsglass manufacturing crucibleshigh-temperature structural applications

Compliance & Regulations

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	42,797.4	ksi	DFT
↳	28,325.9	ksi	DFT · OptB88vdW
↳	42,797.4	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.7565	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Poisson's Ratio(ν)2 entries	0.3300	-	DFT · OptB88vdW
↳	0.3078	-	DFT · PBE
Shear Modulus(G)3 entries	18,871.3	ksi	DFT
↳	14,115.1	ksi	DFT · OptB88vdW
↳	18,871.3	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)	0.4654	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)2 entries	0.5030	eV	DFT · OptB88vdW
↳	0.5490	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	36.32	-	DFT · OptB88vdW
↳	32.03 range 25.56–38.50median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	24.80	-	DFT · OptB88vdW
↳	23.42	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.2100	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.1900	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.2454	C/m²	DFT · OptB88vdW
↳	0.7725	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.00253	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00239	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-424.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	318.7	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	17.48	%	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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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.03360	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.2648	eV/atom	DFT · OptB88vdW
↳	-0.4146	eV/atom	Measured

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

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.

SiOs

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental