Na4B2O5 — Properties & Data | MatWorld

Na4B2O5

ceramic

· JVASP-12806· Na4B2O5

Na₄B₂O₅ is an inorganic ceramic compound belonging to the sodium borate family, which forms glassy or crystalline phases depending on processing conditions. This material is primarily encountered in glass and ceramic formulations where it functions as a flux and network modifier, commonly found in borosilicate glasses, enamels, and ceramic glazes used in industrial applications. Engineers select sodium borates for applications requiring thermal shock resistance, chemical durability, and low melting points; the material is notable for enabling lower processing temperatures compared to traditional silicate ceramics while maintaining structural integrity.

borosilicate glass productionceramic glazes and enamelsthermal insulation coatingsglass flux formulationsindustrial refractorieslaboratory glassware manufacture

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.09277	lb/in³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	4.082	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	2.535	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000862	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000354	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-133.3	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	476.1	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.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-2.266	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.

Na4B2O5

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental