Quartz tubes have high heat resistance, often used at temperatures ranging from 1100 to 1200 degrees Celsius and short-term temperatures up to 1400 degrees Celsius. Quartz glass is mainly used in laboratory equipment and refining equipment for special high-purity products. Because of its high spectral transmission, it is not damaged by radiation (other glasses are darkened by radiation), so it is also an ideal glass for spacecraft, wind tunnels and spectrophotometer optical systems.
A special industrial technical glass of silica single component. This glass has a hardness of up to seven grades of Mohs, with high temperature resistance, low expansion coefficient, thermal shock resistance, chemical stability and electrical insulation, and can transmit ultraviolet and infrared rays. In addition to hydrofluoric acid and hot phosphoric acid, it has good acid resistance to common acids. Divided into two categories, transparent and opaque. According to the purity, it is divided into three categories: high purity, common and doped. It is made of crystal, silica and silicide, and is formed by high temperature melting or chemical vapor deposition. The melting method includes an electrofusion method, a gas refining method, and the like.