Quartz glass is an amorphous material composed of pure silicon dioxide (SiO2), which has excellent physical and chemical properties. Its thermal stability is one of the key attributes in many applications, especially the ability to maintain performance unchanged in high-temperature environments.

1、 Low thermal expansion coefficient

An important feature of quartz glass is its extremely low coefficient of linear thermal expansion (CTE), approximately 0.5 x 10 ^ -6/° C, with little variation in the temperature range of -30 to 1000 degrees Celsius. This means that even if there is a significant change in temperature, the size of quartz glass will hardly change. This characteristic is crucial for applications that require high-precision dimensional stability, such as when used as lenses or mirrors in optical instruments, to ensure consistency and accuracy of the optical path.

2、 Excellent heat shock resistance

Quartz glass can withstand rapid temperature changes without breaking or damaging, known as the "thermal shock" performance. This is due to its uniform internal structure and lower thermal conductivity, which reduces internal stress caused by rapid heating or cooling. Therefore, it can be safely used in places such as furnace windows, high-temperature experimental equipment, etc., where frequent transitions from room temperature to high temperature and back to room temperature may occur.

3、 High softening point and melting point

Quartz glass has a very high softening point of approximately 1713 degrees Celsius, and complete melting into a liquid state requires even higher temperatures, typically exceeding 2000 degrees Celsius. This characteristic makes quartz glass very suitable for use as components in high-temperature processing environments, such as load-bearing vessels in semiconductor manufacturing processes, drawing towers in fiber preform production, and various types of scientific instruments.

4、 Stable chemical properties

In addition to its physical thermal stability, quartz glass also exhibits high resistance to most chemicals, including strong acids (except hydrofluoric acid), alkaline solutions, and organic solvents. Even under high temperature conditions, it does not easily react with external substances, maintaining its own purity and integrity. This is very important for applications involving corrosive substances or processes that require operation in special atmospheres.

5、 Optical transparency is not affected by temperature

High quality quartz glass maintains good transparency throughout the visible spectrum and even in some ultraviolet and infrared regions, and this transparency does not significantly change with increasing temperature. This makes quartz glass an indispensable part of laser technology, astronomical observations, and other precision optical systems, ensuring consistent optical performance at different operating temperatures.

6、 Stability after prolonged exposure to high temperatures

Quartz glass can operate stably for a long time in sustained high temperature environments without structural degradation or performance degradation. This is attributed to its amorphous structure, which avoids the recrystallization phenomenon that may occur in traditional crystalline materials, thereby ensuring long-term reliability.

Quartz glass has become the preferred material in many high-tech fields and industrial applications due to its unique low thermal expansion coefficient, excellent heat shock resistance, high softening point, stable chemical properties, temperature independent optical transparency, and stability after long-term high temperature exposure.

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.