ZERODUR is a type of glass ceramic material that is known for its low thermal expansion coefficient, high thermal stability, and high resistance to dimensional changes with temperature. It is often used as a substrate material in applications where dimensional stability is critical, such as in the manufacture of optical components and laser mirrors, as well as in electronics and medical devices. ZERODUR substrates are known for their excellent mechanical and thermal properties, making them ideal for use in high-temperature and high-stress environments. Additionally, ZERODUR substrates can be machined, drilled, and polished with precision, making them a versatile choice for a variety of applications.