FUSED QUARTZ CRUCIBLE AND ITS PRODUCTION

摘要

A method for fabricating fused quartz crucibles is disclosed. Quartz sand is placed in a rotating fusion pot and takes on the shape of a bowl as a result of centrifugal forces. The quartz sand is heated to a temperature sufficient to melt and fuse the quartz sand together. A fast diffusing gas such as helium or hydrogen is passed through the quartz sand to displace residual gases present in voids defined by the quartz sand. The fast diffusing gas remains present in the voids. The resulting crucible has reduced bubble growth during use as well as reduced bubble count and bubble size at fusion.