KYSiS4

ceramic

· JVASP-40422· KYSiS4

KYSiS4 is a silicon-based ceramic compound belonging to the silicate family, likely a potassium yttrium silicate phase based on its elemental designation. This appears to be a research or specialized ceramic composition rather than a widely commercialized material, positioned within the broader class of advanced silicates used in high-temperature and refractory applications. Engineers would consider this material where thermal stability, chemical resistance, or specific dielectric properties are required in demanding thermal or chemical environments.

refractory componentshigh-temperature insulationceramic matrix compositesadvanced materials researchthermal barrier applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.09989	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	2.808	eV	DFT · OptB88vdW
↳	3.471	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	10.97	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	5.396	-	DFT · OptB88vdW
↳	4.644	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.1225	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00103	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	-234.6	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	335.2	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	1.410	%	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.552	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.

KYSiS4 — Properties & Data | MatWorld

KYSiS4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental