Glass composition for alkali resistant filament

Abstract

Abstract PURPOSE: To provide the title compsn. having a low liquid phase temp., superior meltability and superior fiber collecting work efficiency, and causing no devitrification phenomenon by mixing SO 3 into a SiO 2 -Al 2 O 3 -CaO-MgO type glass compsn. for alkali resistant glass filaments. CONSTITUTION: The title glass compsn. consists of, by wt., SiO 2 ; 45W52%, Al 2 O 3 ; 7W12%, RO; 20W40%, R' 2 O; 0W10%, ZrO 2 ; 0W13%, Fe 2 O 3 : 0W5% and SO 3 : 0.05W0.5% (R; Ca, Mg, Zn or Ba and R'; Na or K). In this compsin. the total amt. of SiO 2 , Al 2 O 3 , RO and ZrO 2 is pref. above 90%, RO is pref. based on CaO and MgO, and part (up to 5 wt%) of CaO may be replaced with ZrO or BaO. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Taminori Suematsu

Bibliographic Details