Compositions: ceramic – Ceramic compositions – Refractory
Patent
1997-05-19
1999-12-14
Group, Karl
Compositions: ceramic
Ceramic compositions
Refractory
501104, 501105, 501127, 429 33, 429304, 204421, 204295, 264608, 264618, 264650, C04B 35486
Patent
active
060017619
ABSTRACT:
Disclosed are a ceramics sheet which has an area of 400 cm.sup.2 or more, thickness of 0.4 mm or less, maximum waviness height of 100 .mu.m or less, and warp of 0.1% or less and in which frequency of generated cracking and breakage is 10% or less when a load-applying test and a deflection-loading test each described in the text are carried out in succession, and a flat and large ceramics sheet having an area of 600 cm.sup.2 or more and thickness of 1 mm or less. Further, disclosed is a method for producing a ceramics sheet having the characteristics described above and characterized in that in calcining a ceramics green sheet to produce a ceramics sheet, the green sheet described above is interposed between porous sheets which have bulk density corresponding to 30 to 85% of the theoretical density and in which the shrinkage rate caused by heating up to the calcining temperature of the above green sheet is 5% or less on condition that the periphery of the green sheet does not protrude from the porous sheets, and calcined.
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Aikawa Norikazu
Hata Kazuo
Imai Hideki
Yasaka Tetuya
Group Karl
Nippon Shokubai Co. , Ltd.
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