Beryllium oxide (BeO), also known as beryllia, is a ceramic material that possesses a unique combination of properties that make it useful in various applications.

BeO has a very high melting point of approximately 2,700 degrees Celsius (4,892 degrees Fahrenheit). This characteristic makes it suitable for use in high-temperature environments and applications. BeO is chemically stable and does not readily react with most chemicals. It is resistant to acids, bases, and many corrosive substances, which makes it durable in harsh environments.

BeO is an excellent conductor of heat, even surpassing most metals. This property makes it highly desirable for applications where efficient heat dissipation is crucial, such as in electronic components and high-power laser systems. Despite its high thermal conductivity, BeO is an outstanding electrical insulator. This combination of properties is particularly useful in applications that require electrical isolation along with good heat transfer, such as in power electronics.