Among many materials, quartz glass rods stand out for their excellent heat resistance, and are widely used in scientific experiments, industrial production and other fields in high-temperature environments. An in-depth understanding of the heat-resistant properties of quartz glass rods is of great significance in order to better utilize their functions and expand their applications.

The material basis of quartz glass rod

Quartz glass is mainly composed of silicon dioxide (SiO₂), its unique atomic structure and chemical bonding properties determine its heat resistance. The silicon - oxygen chemical bonds in silicon dioxide have high bonding energies, and this strong chemical bonding gives quartz glass its structural stability. At high temperatures, these bonds require extremely high energy to break, allowing quartz glass rods to withstand higher temperatures without softening or decomposing.

Heat Resistance Temperature Range

Quartz glass rods are able to maintain their properties over a fairly wide temperature range. Generally, it can be used for long periods of time at temperatures as high as 1000°C to 1100°C. Within this temperature range, the physical and chemical properties of quartz glass rods change very little. For a short period of time, quartz glass rods can withstand even higher temperatures, up to about 1400°C. This excellent resistance to high temperatures allows it to be used as a key component in many high-temperature processes, such as stirring high-temperature glass liquids in the glass manufacturing industry.

Relationship between thermal expansion properties and heat resistance

Quartz glass rods have a very low coefficient of thermal expansion. It has a very small volume change during an increase in temperature. When the material is subjected to thermal expansion, if the coefficient of expansion is too large, it will produce large thermal stresses inside the material. The low coefficient of thermal expansion of quartz glass rods effectively avoids rupture or deformation caused by thermal expansion. For example, if quartz glass rods are used in the observation window of a high-temperature furnace, when the temperature inside the furnace changes rapidly, the quartz glass rods are able to exist stably and will not be damaged due to thermal stress, thus ensuring the normal use of the observation window and the sealing of the environment inside the high-temperature furnace.

Influence of chemical stability on heat resistance at high temperature

In a high-temperature environment, quartz glass rods not only have to withstand the effects of heat, but also have to deal with possible chemical attack. Fortunately, quartz glass has good chemical stability. At high temperatures, it is highly resistant to most acids, alkalis and salts. Even in a high-temperature oxidizing atmosphere, quartz glass rods maintain their chemical stability and do not chemically react with oxygen in the air, etc., which further guarantees its long-term performance in high-temperature environments.

Heat-resistant performance in different application scenarios

(1) Laboratory high-temperature heating equipment

Quartz glass rods are often used as supports and clamps in high-temperature heating equipment such as muffle furnaces and tube furnaces in laboratories. When the sample is processed at high temperature, the quartz glass rods can stably support the sample under the high temperature environment in the furnace to ensure the smooth progress of the experiment. Its heat resistance ensures that the results of the experiment will not be affected by its own deformation or damage during the long heating process.

(2) Optical high temperature applications

In the optical field, such as high-temperature lighting fixtures, quartz glass rods can be used as filament support parts or light guide elements. Under the high temperature generated by the lamps and lanterns, quartz glass rods can maintain their optical and mechanical properties, effectively guide or scatter the light to meet the needs of lighting at the same time, will not fail due to high temperature.

(3) Semiconductor Manufacturing

High-temperature diffusion and photolithography in the semiconductor manufacturing process require high-temperature and high-precision operation. Due to its excellent heat resistance, quartz glass rods can be used to manufacture high-precision fixtures, transmission rails and other components to ensure the stability of the semiconductor chip in the high-temperature treatment process and the accuracy of the process.

With its structural stability based on the chemical bonding of silica, wide temperature range resistance, low coefficient of thermal expansion, and good chemical stability at high temperatures, quartz glass rods have demonstrated irreplaceable advantages in many fields requiring heat-resistant materials.

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.