Boron oxide (B₂O₃), also known as boron trioxide or boric oxide, is the primary oxide of boron. It is a colorless to white, glassy solid known for its strong glassforming ability and high chemical stability. B₂O₃ is widely used across industrial and chemical processes, including:
- Insecticides and pestcontrol formulations
- A precursor for producing numerous boron compounds
- A flux in specialty glasses, enamels, and glassceramics
- A binder and sintering aid, particularly in BN ceramics for hot isostatic pressing (HIP)
Ultrahighpurity B₂O₃ (≥ 99.999%) is essential in advanced materials and semiconductor manufacturing. Key applications include:
- Liquid encapsulation for growing IIIV semiconductor crystals (GaAs, GaP, InP)
- Highpurity boron chemistry
- Optical and electronic materials, specialty glasses, and highperformance ceramics
With its excellent glassforming behavior and ability to create oxygenfree encapsulation environments, high purity B₂O₃ is indispensable for crystal growth and other precision manufacturing processes.
General Properties
| Properties | Value |
| Chemical formula | B₂O₃ |
| CAS Name | 1303862 |
| EC / EINECS Number | 2151258 |
| Molar mass | 69.618 g/mol |
| Appearance | White, glassy solid |
| Melting point | 450 °C (trigonal) / 510 °C (tetrahedral) |
| Boiling point | 1,860 °C (sublimes at ~1500 °C) |
| Density | 2.55 g/cm³ (trigonal) / 3.11–3.146 g/cm³ (monoclinic) |
| Solubility in water | 1.1 g/100 mL (approx.) |
| Water solubility (25 °C) | 36 g/L |
| General solubility | Soluble in water (36 g/L at 25 °C) |
Product Availability
We provide high-purity Boron Oxide (B2O3) tailored for semiconductor and industrial requirements.
| Purity | Up to 99.999% (5N) |
| Forms | Powder |
| Particle sizes | From -50 mesh to -325 mesh |
| Nanoparticle Sizes | From 20um to 100um |
| Package | At request |
If you are in need of any high purity Boron Oxide (B2O3), please contact our sales team for details at sales@american-gmg.com.