K2Na4Be2O5

ceramic

· JVASP-49185· K2Na4Be2O5

K2Na4Be2O5 is a mixed alkali-alkaline earth beryllium oxide ceramic compound, belonging to the family of oxide ceramics with potential applications in specialized optical and thermal materials. This is a research-phase composition rather than an established commercial material; compounds in this family are investigated for their transparency to infrared radiation, low thermal expansion, and chemical stability, making them candidates for high-temperature optical windows and specialized refractory applications where conventional ceramics fall short.

infrared optical windowshigh-temperature refractoriesthermal barrier coatingsresearch ceramicsspecialty glass alternativesthermal management applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.09039	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.770	eV	DFT · OptB88vdW
↳	5.726	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.850	-	DFT · OptB88vdW
↳	2.145	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000833	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000469	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-115.4	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	416.3	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.000	%	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)	-1.982	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.

K2Na4Be2O5 — Properties & Data | MatWorld

K2Na4Be2O5

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental