Fused quartz ceramics have the following advantages:

1, small thermal expansion coefficient

Between room temperature and 800℃, the thermal expansion coefficient of pure quartz ceramic system is 0.54×10-6/℃, which is the same as the thermal expansion coefficient of quartz glass, so it has good volume stability, thermal shock stability and high temperature creep resistance, enabling it to exchange heat and cold more than 20 times between 1000℃ and 20℃ air or water.

2, stable chemical properties

Quartz ceramics can be directly contacted with hydrochloric acid, sulfuric acid, nitric acid and other three strong acids for a long time without any chemical changes; Secondly, quartz ceramics do not react with lithium, sodium, potassium, uranium and other corrosive metal melts; Finally, quartz ceramics can also be used to resist the corrosion of high temperature glass liquids.

3, stable thermal conductivity

The thermal conductivity of quartz ceramics is very low and almost constant from room temperature to 1100℃.

4. Excellent mechanical properties at high temperature

When the temperature reaches 1000℃, the bending strength and other physical and mechanical properties of fused quartz ceramics increase with the increase of temperature, the increase value is up to 33%. This characteristic is different from other ceramics. The main reason is that the plasticity of fused quartz ceramics increases and the brittleness decreases with the increase of temperature. This characteristic is beneficial to the application of fused quartz ceramics at high temperature.

5, the body dry, burning shrinkage rate is small

Melting quartz ceramics drying, burning shrinkage rate is generally less than 5%, so it is conducive to the preparation of large size products.

6, good dielectric properties

Fused quartz ceramics have low dielectric constant and low dielectric loss, and the change of the tangent value of dielectric constant and dielectric loss Angle with temperature is much lower than other high temperature ceramics, which can meet the requirements of small radar wave attenuation and distortion, and is the ideal material for missiles and radome.

7, good anti-nuclear radiation performance

Fused quartz ceramics have an amorphous structure and a small coefficient of thermal expansion, so they have relatively stable structure and strength under radiation conditions, unlike other materials that will be transformed into amorphous structure, which makes them widely used in the atomic energy industry and radiation prevention laboratories.