1. High temperature resistance glass can work under 1100°C continuously,and in short time can even work under 1450°C,its softening
point is 1680°C. 2. Corrosion resistant, Except hydrofluoric acid, quartz tube do not react with any acid and base .the stability
is 30 times of the ceramic,and 150 times of stainless steel . 3. Excellent thermal shock stability. 4. High transmission to 85%.
5. Electric insulation ,it is 10000 times of usual glass.