Changsha Santech Materials Co., Ltd. is a private enterprise that integrates scientific research, material processing and recycling of Tellurium, Bismuth and Indium. We successfully developed Hight purity Tellurium Dioxide 99.999%, Tellurium Tetrachloride 99.99%-99.999%, Tellurium 5N / Selenium 5N / Cadmium 5N, as well as low-oxygen metal powder. We aim to be a leading premium supplier of specialty purified metals and advanced materials in the world.