We make transparent quartz glass with highly pure crystal and melt it by an oxyhydrogen flame. It is transparent and bubble-free, having high content of SiO2, high temperature resistance, deformation resistance, and recrystallize resistance. It is used in the semiconductor industry and in laboratories, in form of rods, tubes, crucibles, furnace tubes, boat bodies, instruments, and vessels. For the Solar Energy PV Industry is rapidly developing, our products have been used by the major domestic companies in the fields of photovoltaic industry,especially the big inch furnace tube of transparent quartz glass and the solar photovoltaic containers.

(1)Performance of the Transparent Quartz Glass used for the Semiconductor Industry

1, Chemical performance：

Besides hydrofluoric acid, quartz glass has good corrosion resistance to most acidic, alkaline and neutral material.

Hydroxyl content: about 200 ppm.

Chemical purity:                                                         （Unit：ppm）

2,Thermal performance:

① The average thermal expansion coefficient at 0～1000℃ is 5.4×10-7/℃

② Recrystallization temperature: Initial temperature is about 1000℃，while the dirty surface will cool down the recrystallization temperature and speed up the recrystallization process.

③ Normal operating temperature:  Continuous usage: About 1050℃;

Noncontinuous usage: About 1250℃;

④ Characteristic temperature:

Strain temperature: About 1075℃;

Anneal temperature: About 1180℃;

Hot processing temperature: About 1700～2100℃.

(2)  Regular types and specs of the quartz glass                          （Unit：mm）