Quartz crucible, as a commonly used high-temperature resistant container, has a wide range of applications in laboratories and industrial fields. The main component of its material is silicon dioxide (SiO ₂), which endows quartz crucibles with excellent high temperature resistance. So, how high temperature can the material of quartz crucible withstand?

1、 Basic Materials and Characteristics of Quartz Crucibles

Quartz crucible, also known as quartz glass crucible, is a glass product mainly made of high-purity quartz sand and melted at high temperature by arc. Its SiO ₂ content is usually greater than 99.99%, and can even reach higher, which makes quartz crucibles have extremely high purity and excellent high temperature resistance. In addition, quartz crucibles also have excellent chemical stability, thermal shock resistance, low coefficient of expansion, and superior transparency.

2、 High temperature resistance of quartz crucible

The high temperature resistance of quartz crucible is one of its most outstanding characteristics. Generally speaking, quartz crucibles can withstand temperatures of up to 1000 degrees Celsius, and even some high-quality quartz crucibles can withstand temperatures exceeding 1450 degrees Celsius in a short period of time. Specifically:

Maximum continuous use temperature: The maximum continuous use temperature of quartz crucible is about 1100 degrees Celsius. At this temperature, the quartz crucible can work stably for a long time without significant deformation or damage.

Short term high temperature resistance: In addition to continuous use temperature, quartz crucibles also have a certain degree of short-term high temperature resistance. In a short period of time (such as minutes to hours), quartz crucibles can withstand temperatures up to 1450 degrees Celsius or even higher. This has made quartz crucibles widely used in high-temperature melting tests, single crystal silicon drawing, and other situations that require short-term high-temperature treatment.

It should be noted that although quartz crucibles have high temperature resistance, it is still necessary to avoid exceeding their load-bearing limit during use. Long term or excessively high temperature use may cause deformation, rupture, or even melting of quartz crucibles.

3、 Precautions for using quartz crucible

In order to ensure the safe use and prolong the service life of quartz crucibles, the following are some precautions for use:

Avoid rapid cooling: Quartz crucibles cannot cool rapidly after heating, otherwise they may rupture due to excessive thermal stress. The cooling rate should be controlled at around 4 degrees per minute.

Handle with care: Quartz crucibles are glass products that are prone to breakage. During transportation and use, handle with care to avoid collisions and falls.

Avoid contamination: Quartz crucibles should be stored in a clean environment to avoid contamination from dust, oil, and other contaminants. Attention should also be paid to maintaining the cleanliness of the crucible during loading and use.

Choosing the appropriate flux: When conducting melting tests using quartz crucibles, a suitable flux should be selected. Some fluxes may cause corrosion or damage to quartz crucibles, so it is important to fully understand the chemical properties of the fluxes before use.

4、 Application fields of quartz crucible

Quartz crucibles have been widely used in various fields due to their excellent high temperature resistance and chemical stability. For example:

Single crystal silicon drawing: In the semiconductor industry, quartz crucible is one of the key auxiliary materials for drawing single crystal silicon. Its high purity and high temperature resistance provide strong guarantees for the quality of single crystal silicon.

High temperature melting test: In the laboratory, quartz crucibles are commonly used for conducting high temperature melting tests. Its high temperature resistance enables quartz crucibles to withstand chemical reactions and physical changes at high temperatures.

Precious metal smelting: In the field of precious metal smelting, quartz crucibles also play an important role. Its chemical stability and high temperature resistance enable quartz crucibles to withstand the high temperature and corrosive environment during precious metal smelting processes.

The material of quartz crucibles can withstand temperatures of up to 1000 degrees Celsius, and even some high-quality quartz crucibles can withstand temperatures exceeding 1450 degrees Celsius in a short period of time. Its excellent high temperature resistance and chemical stability have made quartz crucibles widely used in laboratories and industrial fields. However, during use, it is still necessary to avoid exceeding its load-bearing limit and take corresponding protective measures to ensure its safe use and extend its service life.

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.