Thermal expansion of high alumina bricks

The thermal expansion of high alumina bricks refers to the physical property that their volume or length increases with temperature. The thermal expansion of high alumina bricks can be expressed by linear expansion rate and coefficient, as well as volumetric expansion rate and coefficient. The linear expansion rate refers to the relative change rate (%) of the length of the specimen from room temperature to the test temperature. The coefficient of linear expansion refers to the relative rate of change in the length of the specimen for every 1 ℃ increase from room temperature to the test temperature.

The thermal expansion of high alumina bricks should be measured according to the national standard GB/T 7320-2008.

The thermal expansion of high alumina bricks depends on their chemical composition, mineral composition, and microstructure, and also varies with temperature ranges.

The thermal expansion of high alumina bricks has a direct impact on their thermal shock resistance and volume stability, which is one of the important properties that should be considered when formulating firing systems and using high alumina bricks.