KErS2 — Properties & Data | MatWorld

KErS2

ceramic

· JVASP-1483· KErS2

KErS2 is a rare-earth kernesite ceramic compound combining potassium, erbium, and sulfur in a sulfide-based ceramic matrix. This material belongs to the family of rare-earth sulfide ceramics, which are primarily explored in research and specialized applications requiring high-temperature stability and chemical resistance. KErS2 is not widely commercialized but represents the potential of rare-earth sulfide systems for niche applications in extreme environments where conventional oxides or nitrides may be insufficient.

high-temperature coatings (research)chemical corrosion barriersrare-earth sulfide compositesthermal management applications (experimental)aerospace component protectionspecialty ceramics research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	49.49	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2300	-	DFT · OptB88vdW
Shear Modulus(G)	33.81	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	4.471	kg/m³	DFT · OptB88vdW

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

Filter by

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	2.362	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	14.19	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	5.454	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.6267	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.687	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00296	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00177	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-254	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	269.1	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.

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-2.068	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.

KErS2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental