... by high temperature resistance, good thermal stability, free selection Opaque Quartz Glass Tube/ Milky quartz glass tube The ... any harmful radiation, and it is characterized by high temperature resistance, good thermal stability, free selection of heating temperature, and ... The OH contents: ≤50ppm, ≤10ppm, ≤5ppm, ≤1ppm Applications: It serves as material of infrared heating for heaters, micro-wave ...