What are the aspects of quartz instrument performance?

In the lab, we often come into contact with some quartz instruments, then what are the properties of these quartz-made instruments?

Quartz equipment manufacturers from the following four aspects of its performance:

1, optical properties: quartz glass is through the ultraviolet, visible light, near infrared performance of the best glass, therefore, often with its optical properties to prepare some optical instruments.

2, the mechanical properties: quartz glass mechanical properties better than glass and ceramics, several major indicators of density 2.2g / cm3, elastic modulus 700 * 103kg / cm3, tensile strength -500kg / cm3, solute hardness of 5.5-6.5 , At 1180 ℃ annealing temperature to reach the maximum strength, which is a major feature of quartz glass.

3, thermal performance: 5.4 * 10-7, because the quartz glass quartz glass thermal expansion coefficient is very small, equivalent to ordinary glass 1 / 12-1 / 20, 0-1000 ℃ in the average expansion of the number of thermal expansion coefficient is minimal , So it is subject to hot and cold sudden changes in tolerance to the temperature difference is quite strong, generally can withstand 1200-15 ℃ quenching and emergency test.

4, chemical properties: quartz glass is an excellent acid-resistant materials, in addition to hydrofluoric acid and phosphoric acid above 300 ℃, any concentration of acid solution until the boiling point, the erosion of quartz glass are minimal, but also resistant to the erosion of neutral substances, Although the alkali should be, but the reaction rate is relatively small, therefore, quartz glass is a good chemical resistant materials.