KAs — Properties & Data | MatWorld

KAs

ceramic

· KAs

KAs is a ceramic material with potassium and arsenic as primary constituents, belonging to the broader family of inorganic ceramics. This compound represents a specialized ceramic system with potential applications in environments where chemical stability and thermal resistance are valued, though it remains relatively uncommon in mainstream engineering practice. The material's utility would be driven by its chemical composition rather than mechanical superiority, making it most relevant for niche applications where arsenic-containing ceramics offer advantages over conventional alternatives.

semiconductor processing equipmentchemical resistant coatingsspecialized refractory applicationsresearch phase materialshigh-temperature chemical environments

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	17.27	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1800	-	DFT · OptB88vdW
Shear Modulus(G)	7.820	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	3.045	kg/m³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.7620	eV	DFT · OptB88vdW
↳	1.649	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	12.80	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.928	-	DFT · OptB88vdW
↳	5.663	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	0.7567	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.430	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000992	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00117	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-143.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	226.9	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	30.15	%	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)	0.1221	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.4112	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.

KAs

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental