METHOD OF IMPROVING THE SAG RESISTANCE OF A COMPONENT CONSTRUCTED FROM FUSED QUARTZ

摘要

A high temperature jig is made from fused quartz tubing (1, 2: 6) reinforced internally by a sag-resistant tubular skeleton (5). To prevent reaction between the tube (6) and skeleton (5) at high temperature (i.e. above 900 DEG C) a refractory barrier layer (7) is interposed between the tube and skeleton. A woven sock of high silica glass or aluminosilicate fibres makes a suitable barrier layer.