B2O3
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
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 4,812.1 | ksi | — | ||
| ↳ | 8,702.3 | ksi | — | ||
Poisson's Ratio(ν) | 0.1300 | - | — | ||
Shear Modulus(G)2 entries | 5,201.5 | ksi | — | ||
| ↳ | 8,035.1 | ksi | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.09100 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)4 entries | 4.900 | eV | — | ||
| ↳ | 0.000 | eV | — | ||
| ↳ | 4.890 | eV | — | ||
| ↳ | 6.545 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 4.790 | - | — | ||
| ↳ | 5.363 | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.7961 | C/m² | — | ||
| ↳ | 0.3955 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -342.4 | µV/K | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.00470 | eV/atom | — | ||
Formation Energy(ΔHf)3 entries | 0.1520 | eV/atom | — | ||
| ↳ | -2.640 | eV/atom | — | ||
| ↳ | -2.533 | eV/atom | — |
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.
Verified Unverified Low confidence (<80%) Link to source
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.