CERAMIC MATERIALS HAVING LOW COEFFICIENT OF THERMAL EXPANSION AND MANUFACTURE

摘要

1518253 Zircon ceramics NIPPON TELEGRAPH & TELEPHONE PUBLIC CORP and NIPPON TSUSHIN KOGYO KK 27 Jan 1977 [4 Feb 1976] 03364/77 Heading C1J A process for producing ceramics to be used in semiconductor devices comprises adding to zircon (ZrSiO 4 ) 5-30 weight per cent of a calcination product of kaolin, ball clay or the like (Al 2 O 3 .2 SiO 2 ) and further adding thereto an additive selected from Group I or from each of Groups I and II (or a precursor thereof) (percentages by weight): moulding the mixture and firing at 1200-1450‹C.