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High‐Thermal‐Expansion Polycrystalline Leucite Ceramic
Author(s) -
Ota Toshitaka,
Takahashi Minoru,
Yamai Iwao,
Suzuki Hisao
Publication year - 1993
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.1151-2916.1993.tb07782.x
Subject(s) - leucite , thermal expansion , materials science , tetragonal crystal system , ceramic , sintering , crystallite , composite material , mineralogy , scheelite , crystal structure , crystallography , metallurgy , chemistry , tungsten
A high‐thermal‐expansion ceramic consisting of leucite crystals was prepared by sintering leucite powder. The densification was promoted by adding Li 2 CO 3 or Na 2 CO 3 . The leucite ceramic obtained had a thermal expansion coefficient of about 2.4 × 10 −5 /°C from room temperature to 600°C. Some of the Li + and Na + ions were incorporated into the leucite crystal lattice to form solid solutions, and the characteristic tetragonal‐cubic inversion point shifted from ca. 600° to 650°C.