PROCESS FOR PRODUCING A HIGH PURITY POWDER

摘要

Quartz powder, preferably, a synthetic quartz powder prepared by the sol-gel method, which while heated from room temperature to 1700 [deg] C, generates a gas containing CO and CO 2in amounts of 300 nanoliter/g or less and 30 nanoliter/g or less, respectively; a method for preparing the quartz powder, and a formed glass article prepared by melting the quartz powder and forming the resultant molten quartz. The quartz powder has extremely high purity and quality and the formed glass article contains an extremely small amount of foam.