High-purity quartz possesses some "magical powers", and we will elaborate on them one by one.

Firstly, it has excellent light transmission properties. High-purity quartz exhibits outstanding light transmission across a wide spectrum from deep ultraviolet to infrared. Its ultraviolet transmission rate is extremely high, making it an ideal material for the lenses in deep ultraviolet lithography technology. In the infrared range, it also maintains good light transmission, and can be used to manufacture windows and lenses for infrared optical instruments. Additionally, high-purity quartz has good optical homogeneity and a stable refractive index, which can effectively reduce aberrations and chromatic aberrations in optical systems, thereby enhancing imaging quality.

Secondly, it has an extremely low coefficient of thermal expansion, at the order of 10⁻⁷/℃, which is much lower than that of ordinary glass and most metal materials. This characteristic enables high-purity quartz to maintain dimensional stability in environments with drastic temperature changes, and it is less prone to deformation and cracking. For instance, in the high-temperature heat treatment stage of semiconductor chip manufacturing, the quartz boats that carry silicon wafers need to have this excellent thermal stability to ensure the processing accuracy of the silicon wafers. Moreover, high-purity quartz also has excellent high-temperature resistance, with a melting point of up to 1713℃, allowing it to work stably in high-temperature environments for long periods. It can be used in thermal protection components of aerospace engines and heating elements of high-temperature furnaces.

Finally, high-purity quartz is an excellent insulating material, with a resistivity as high as 10¹⁶ - 10¹⁸ Ω・cm and a low and stable dielectric constant. In high-frequency and high-voltage environments, high-purity quartz can maintain good insulation performance, and is thus widely used in electronic components, integrated circuit substrates, and other fields. For example, in the radio frequency devices of 5G communication base stations, high-purity quartz can be used to manufacture high-performance insulating support components to ensure the stability and reliability of signal transmission.