PROCESS FOR MANUFACTURING A PRODUCT SUITABLE FOR PRODUCING PURE QUARTZ GLASS AS WELL AS A PROCESS FOR PRODUCING PURE QUARTZ GLASS FROM THIS PRODUCT AND USE OF THIS PRODUCT FOR GROWING PIEZOELECTRIC CRYSTALS

摘要

AbstractA process is described for manufacturing a productfrom natural non-transparent quartz (milky quartz), thisproduct being suitable for producing pure quartz glass,as well as a process for processing this product fur-ther to produce a shaped body made of pure quartzglass. It is also set forth that this product issuitable as a starting material for growing piezo-electric crystals in an autoclave.