Alumina brick thermal expansion

Alumina bricks, also known as high alumina bricks, have a relatively low coefficient of thermal expansion. The coefficient of thermal expansion for alumina bricks typically ranges from 5 to 7 x 10^-6/°C (or 5 to 7 micrometers per meter per degree Celsius).

This means that when the temperature of alumina bricks is increased, they will only expand slightly in size due to their low coefficient of thermal expansion. Conversely, when the temperature is decreased, the bricks will contract only slightly.

The low coefficient of thermal expansion makes alumina bricks a suitable material for use in high-temperature applications where dimensional stability is important. They are commonly used in industries such as steelmaking, ceramics, and glass manufacturing, where temperature fluctuations can cause other types of materials to crack or warp.

It is important to note that while the coefficient of thermal expansion for alumina bricks is relatively low, it may still vary depending on the specific composition of the brick, the firing temperature, and other factors. Therefore, it is always recommended to consult with a manufacturer or supplier to determine the exact thermal expansion properties of a specific type of alumina brick.