What is the secret of quartz glass’s high temperature resistance of 1200℃? | Quartz Glass Thermal Resistance Explained

 

In the field of high temperature applications, quartz glass is widely used in semiconductor manufacturing, photovoltaic modules, high temperature experimental equipment and chemical reaction systems. Why can it work stably for a long time in an environment as high as 1200℃, and even withstand temperatures of up to 1450℃ for a short time? This article will reveal the core principles behind the high temperature resistance of quartz glass.

1. High-purity silica is the key

  • The main component of quartz glass is silicon dioxide (SiO₂) with a content of more than 99.99%, and no alkali metal impurities, which gives it excellent thermal stability.
  • Ordinary glass contains alkali metals such as Na and K, which are easily decomposed at high temperatures.
  • Quartz glass has high purity and will not release impurities or undergo structural changes at high temperatures.
  • Keywords: high-purity quartz glass, SiO₂ content, thermal stability

2. Extremely low thermal expansion coefficient

  • The thermal expansion coefficient of quartz glass is very low, about 0.55×10⁻⁶/℃ (much lower than ordinary glass).
  • When heating or cooling, there is almost no volume expansion or contraction.
  • Effectively prevent thermal shock cracking, and it is not easy to burst even if it is heated or cooled quickly.
  • Keywords: thermal expansion coefficient, thermal shock, high temperature stability

3. Stability brought by amorphous structure

  • Quartz glass is an amorphous material (Amorphous) with no crystal structure, which means that it:
  • There are no grain boundaries and grain defects, and it is not easy to break due to thermal stress concentration
  • Maintaining uniform structure at high temperature without crystallization or phase change
  • This allows quartz glass to work at 1450℃ for a short time, and the softening point is as high as 1700℃, which is unmatched by other high-temperature materials.

4. Advanced manufacturing process to ensure quality

  • High temperature tolerance also depends on the manufacturing method. We use:
  • Electrofusion or vapor deposition manufacturing to reduce bubbles, streaks, and impurities
  • Strictly control the heat treatment process to improve thermal stability and mechanical strength
  • Different specifications can be customized according to needs, such as quartz cleaning tanks, quartz tubes, quartz boats, etc.

5. Application areas

  • With its excellent temperature resistance, quartz glass is widely used in:
  • Semiconductor industry: such as cleaning tanks, reaction tubes, wafer carriers
  • Photovoltaic industry: solar cell annealing and diffusion
  • High temperature experiments: thermogravimetric analysis, high temperature atmosphere furnace windows
  • Chemical industry: reaction vessels under acidic solutions

 

The reason why quartz glass can withstand high temperatures above 1200℃ for a long time is because of its extremely high purity, excellent thermal properties and unique structural characteristics. If you are looking for materials that can operate stably at extreme temperatures, high-purity quartz glass is undoubtedly the best choice.

Welcome to contact us for quotes and technical support for customized quartz glass products!