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High‐Temperature Stability of the Al 2 O 3 ‐LaPO 4 System
Author(s) -
Marshall David B.,
Morgan Peter E. D.,
Housley Robert M.,
Cheung Jeffrey T.
Publication year - 1998
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.1151-2916.1998.tb02432.x
Subject(s) - materials science , mineralogy , analytical chemistry (journal) , chemistry , chromatography
The compatibility of Al 2 O 3 and LaPO 4 at temperatures up to 1600°C is examined. Provided the ratio of La to P was close to 1:1, no reactions were observed after 200 h at 1600°C. Moreover, the Al 2 O 3 /LaPO 4 interface remained sufficiently weakly bonded to cause deflection of cracks, as reported previously. In the presence of excess P or La, reactions occurred as expected, forming AlPO 4 in the case of excess P, and LaAlO 3 and LaAl 11 O 18 in the case of excess La.