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Low‐Thermal‐Expansion Polycrystalline Zirconyl Phosphate Ceramic
Author(s) -
YAMAI IWAO,
OOTA TOSHITAKA
Publication year - 1985
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1985.tb15321.x
Subject(s) - materials science , thermal expansion , thermal shock , crystallite , sintering , ceramic , phosphate , grain size , grain growth , oxide , phase (matter) , chemical engineering , composite material , mineralogy , metallurgy , chemistry , organic chemistry , engineering
The synthesis of thermal‐shock‐resistant material from zirconyl phosphate, 2ZrO 2 P 2 O 5 , was investigated. Modifications of the compound were examined; only the a phase appears to be thermodynamically stable. Sintering of a‐phase powder to a dense ceramic was promoted by adding a metal oxide. Crystalline zirconyl phosphate has a low average thermal expansion coefficient. The relation of microcracking to grain size and strength was studied using specimens sintered under varied conditions. A strong low‐thermal‐expansion polycrystalline ceramic was obtained by controlling grain growth.