B2O3 — Properties & Data | MatWorld

B2O3

Name: B2O3
Brand: MatWorld

ceramic

· B2O3

Boron trioxide (B₂O₃) is an inorganic ceramic oxide commonly used as a glass-forming agent and constituent in borosilicate glasses rather than as a monolithic structural ceramic. It is primarily encountered in the glass industry as a key component that lowers melting temperatures and improves thermal shock resistance, and in smaller volumes as a dopant in specialty ceramics and refractory applications. Engineers select B₂O₃-containing formulations for their chemical durability, low thermal expansion, and ability to create glasses with precise optical and mechanical properties at lower processing temperatures compared to pure silica systems.

borosilicate glass formulationlaboratory glasswareoptical glassthermal shock-resistant coatingsrefractory additivesceramic glazes and enamels

Compliance & Regulations

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	4,812.1	ksi	DFT
↳	8,702.3	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1300	-	DFT · OptB88vdW
Shear Modulus(G)2 entries	5,201.5	ksi	DFT
↳	8,035.1	ksi	DFT · OptB88vdW

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
Density(ρ)	0.09100	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)	0.000 – 9.188	eV	5 entriesClick to expand
Dielectric Constant (Relative Permittivity)(εr)2 entries	5.363	-	DFT · OptB88vdW
↳	4.790	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.908	-	DFT · OptB88vdW
↳	2.352	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.3955	C/m²	DFT · OptB88vdW
↳	0.7961	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.00114	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000311	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-351.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	506.2	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.

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

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.00470	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)3 entries	0.1520	eV/atom	DFT
↳	-2.533	eV/atom	DFT · OptB88vdW
↳	-2.640	eV/atom	Measured

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

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.

B2O3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental