USE OF BOROSILICATE AND QUARTZ GLASSES AS STRUCTURAL-MATERIALS OF CONTAINERS FOR STORING ULTRAPURE GERMANIUM TETRACHLORIDE

The contaminating effect of borosilicate and quartz glasses on ultrapu re germanium tetrachloride (GT) for optical fiber production has been studied under industrial conditions during long-term storage of GT in containers made of these glasses. Ultrapure quartz glass (Technical Sp ecification TU 21-23-238-88) and Duran borosilicate glass have been fo und to provide the best preservation of GT quality as regards the cont ents of Cu, V, Fe, Co, Mn, Cr, Ni, and Ti impurities for 500-h storage . Siemax borosilicate glass substantially contaminates GT with iron. w hich results from the chemical composition of the Siemax glass and the process of its production.