... bubbles. 4.Different styles for your choice. Clear round quartz plate have the features of high purity,heat resistance and low ... coefficient of thermal expansion.Clear round quartz plates quartz disc:Quartz plates, SiO2≥99.99%. The quartz plates have the features of high ... : length 10-1200mm, Width 10-800mm, thickness1-40mm. The quartz plates are widely used in the fields including semiconductor, light ...