... and 1.5 mm, 1.8, 1.9, 2.0, 3, 4, 5, 6, 10 mm, 20, 25, 28, 30, 50 ... : used in single end halogen lamp pressure bridge bar, fiber optic lighting, quartz fiber manufacturing, semiconductor silicon wafer processing, etc. This clear quartz ... temperature chemical stability, is any other engineering material can match. 3. Good thermal stability. Quartz glass of coefficient of thermal expansion ...