Quartz optical glass is a type of glass material made from high-purity quartz (silicon dioxide, SiO2). It has the following characteristics and applications:

1. High transmittance: Quartz optical glass has high transmittance, especially in the ultraviolet and infrared range, making it suitable for manufacturing UV and IR optical devices.

2. Low thermal expansion coefficient: Quartz optical glass has a low thermal expansion coefficient, which helps maintain stability during temperature changes. It is suitable for manufacturing high-precision optical instruments.

3. High heat resistance: Quartz optical glass can withstand high temperatures and is suitable for use in high-temperature environments, such as high-temperature lasers and high-temperature optical devices.

4. Chemical stability: Quartz optical glass has good stability against most acids, alkalis, and other chemicals, making it resistant to corrosion. It is suitable for manufacturing chemical laboratory vessels, chemical sensors, etc.

5. High mechanical strength: Quartz optical glass has high mechanical strength and hardness, making it resistant to breakage. It is suitable for manufacturing durable optical devices.

6. Electrical insulation: Quartz optical glass is an excellent electrical insulating material, non-conductive, making it suitable for manufacturing insulation components for electronic devices.

In summary, due to its excellent optical properties, chemical stability, and heat resistance, quartz optical glass is widely used in optical instruments, laser systems, chemical laboratory vessels, electronic devices, and other fields.