Whether the silicon brick is easy to deform at high temperature needs to be analyzed according to its use environment and temperature range. Generally speaking, silicon bricks have good stability at high temperature, but deformation problems may occur under certain conditions.

I. High temperature stability of silicon brick

(1) the load softening temperature is high

The softening temperature of silicon brick under load is usually above 1650℃, which means that under high temperature and load conditions, silicon brick can maintain structural stability and is not easy to deform. In the long-term high-temperature use, the volume of silicon brick changes little and shows good stability.

(2) Thermal expansion characteristics

The thermal expansion coefficient of silicon brick is relatively low, and the volume change produced in high temperature use is small. However, at the low temperature stage (such as 180-270℃), silicon bricks will undergo significant crystal transformation, resulting in volume expansion. When the temperature is below 600℃, the resistance of silicon brick to rapid cooling and rapid heating is poor, and cracks are easy to occur due to temperature changes.

(3) High temperature creep

Silicon brick has low creep rate at high temperature and can bear thermal load for a long time without obvious deformation. This makes the silicon brick keep good shape and mechanical properties in high temperature environment.

II. Possible deformation of silicon brick at high temperature

Although silicon brick has high load softening temperature and good high temperature stability, it may still be deformed in some cases:

Severe temperature change: if the temperature changes too fast, especially from low temperature to high temperature, the silicon brick may be cracked or deformed due to internal stress.

Long-term high-temperature load: when used for a long time under the condition close to its load softening temperature, the silicon brick may gradually deform due to creep.

Complex working conditions: In the environment with large temperature fluctuation or chemical erosion, the stability of silicon brick may be affected.

III. Summary

Silicon brick has good stability at high temperature and is not easy to deform, but its performance is greatly influenced by temperature change and use environment. In the process of use, we should try our best to avoid the violent fluctuation of temperature and ensure that it is used in a suitable temperature range to give full play to its high temperature stability.