Quartz tubes are primarily composed of fused quartz, which is derived from high-purity quartz crystals. These crystals are melted at extremely high temperatures, around 3632°F (2000°C), using specialized furnaces. The resulting material, fused quartz, is characterized by its exceptional optical and thermal properties, which are superior to those of other types of glass due to its high purity.
The composition of quartz tubes is predominantly silica (SiO2), with a purity level of at least 99.9%. This high purity is crucial for applications in industries such as semiconductors, where the presence of trace metals could be detrimental. The manufacturing process involves melting the quartz crystals and then cooling the melt to form tubes of desired dimensions and shapes.
Quartz tubes are available in both transparent and milky white forms. The transparent variety is particularly valued for its ability to withstand high temperatures, up to 1100 degrees Celsius, and its remarkable resistance to thermal shock, which allows it to withstand rapid temperature changes from 1000 degrees Celsius to room temperature. This thermal shock resistance is attributed to the extremely low coefficient of thermal expansion of the material.
In summary, quartz tubes are made from high-purity fused quartz, primarily composed of silica (SiO2) with minimal trace elements. Their manufacturing involves high-temperature melting and controlled cooling processes, resulting in a material with exceptional thermal and optical properties suitable for a wide range of industrial and scientific applications.
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