Boron oxide is a colorless glassy solid that is used as an insecticide fluxing agent and bonding agent. It is also known as boric oxide or boria. Boron oxide (B₂O₃), also known as boric oxide or diboron trioxide, is a colorless, glassy solid formed by the dehydration of boric acid. It is a key compound used in various industries, including glass, ceramics, and electronics, and is known for its high-temperature resistance and ability to act as a fluxing agent.
Borosilicate Glass: Boron oxide is a key ingredient in borosilicate glass, known for its high thermal resistance and chemical durability, making it suitable for applications like laboratory glassware, cookware, and ovenware.
Fluxing Agent: It acts as a flux in the production of glass and enamels, lowering the melting temperature and improving the flow of the molten materials.
Glass Fibers: Boron oxide is used as an additive in glass fibers, including optical fibers.
Ceramic Applications: It's used as a bonding agent in the hot isostatic pressing of boron nitride ceramics and as a flux for glazes and enamels.
Technical Specifications
TECHNICAL SPECIFICATON::
Chemical Formula: B2O3
CAS Number: 1303-86-2
Appearance: Colorless, semi-transparent glassy lumps or hard white odorless crystals.
Molecular Weight: 69.62 g/mol
Melting Point: ~450 °C (lit.)
Boiling Point: ~1860 °C (lit.)
Density: ~2.46 g/mL at 25 °C (lit.)
Bulk Density: ~900-1100 kg/m3
Solubility: Moderately soluble in water
Hygroscopic: Yes
B2O3 Content: 98.00% min
SO4 Content: 500 ppm max
Cl Content: 10 ppm max
Fe Content: 35 ppm max
Size Content +0.250 mm: 35.00% max
Other Names
Boric Oxide, Boria
Precautions & Remarks
Other Applications:
Insecticide: Boron oxide can be used as an insecticide, targeting the nervous system of insects.
Dopant in Semiconductors: It's used as a dopant in semiconductor materials.
High-Temperature Lubricants: Boron oxide is used as an additive in high-temperature lubricants.
Nuclear Waste Glasses: Boron oxide is commonly substituted for silica in nuclear waste glasses, improving their properties.
Protective Coating: Boron oxide can be used to protect carbon anodes from air oxidation.
Procedure
Chemical Synthesis and Catalysis:
Starting Material: Boron oxide serves as a starting material for the synthesis of other boron compounds, such as boron carbide.
Acid Catalyst: It acts as an acid catalyst in organic synthesis and the preparation of boron halides, sodium borohydride, metallic borates, and borate esters.
Chemical Intermediate: It's used as a chemical intermediate in the production of boron halides, esters, carbide, nitride, and metallic borides.
Keywords
PRECAUTION::
Avoid Exposure: Minimize exposure to boron oxide, especially dust, by using local exhaust ventilation or other engineering controls.
Prevent Dust Formation: Avoid creating dust when handling boron oxide.
Good Housekeeping: Maintain good housekeeping and sanitation practices in the work area.
Do not eat, drink, or smoke: during work.
Wash thoroughly: before eating or smoking.
Do not blow dust off clothing or skin: with compressed air.