Characteristic

Beryllium oxide,  is an inorganic compound with the formula BeO. This colourless solid is a notable electrical insulator with a higher thermal conductivity than any other non-metal except diamond, and exceeds that of most metals. As an amorphous solid, beryllium oxide is white. Its high melting point leads to its use as a refractory material.

Chemical formula：BeO

Molar mass：25.011 g·mol⁻¹

Appearance：Colourless, vitreous crystals

Odor：Odourless

Density：3.01 g/cm³

Melting point：2,507 °C (4,545 °F; 2,780 K)

Boiling point：3,900 °C (7,050 °F; 4,170 K)

Solubility in water：0.00002 g/100 mL

Thermal conductivity：330 W/(K·m)

Refractive index (nD)：1.719

Application

Sintered beryllium oxide is a very stable ceramic.Beryllium oxide is used in rocket engines and as a transparent protective over-coating on aluminised telescope mirrors.

Beryllium oxide is used in many high-performance semiconductor parts for applications such as radio equipment because it has good thermal conductivity while also being a good electrical insulator. It is used as a filler in some thermal interface materials such as thermal grease.It is also used as a structural ceramic for high-performance microwave devices, vacuum tubes, magnetrons, and gas lasers. BeO has been proposed as a neutron moderator for naval marine high-temperature gas-cooled reactors (MGCR), as well as NASA's Kilopower nuclear reactor for space applications.

BeO-MSDS.pdf