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High‐Temperature Mechanical Properties and Chemical Stability of Ba 1+x Zr 4 P 6–2x Si 2X O 24 Low‐Thermal‐Expansion Ceramics
Author(s) -
Harshé Girish,
Agrawal Dinesh,
Limaye Santosh
Publication year - 1994
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.1151-2916.1994.tb07080.x
Subject(s) - thermal expansion , materials science , anisotropy , thermal stability , atmospheric temperature range , thermal , lattice (music) , ceramic , modulus , composite material , mineralogy , thermodynamics , chemistry , physics , organic chemistry , quantum mechanics , acoustics
The NaZr 2 P 3 O 12 (NZP) family of materials is attracting increasing attention due to its low‐thermal‐expansion behavior. The system Ba 1+x Zr 4 P 6–2x Si 2x O 24 (0 ≤ x ≤ 1), belonging to the NZP family, shows ultralow thermal expansion over a wide temperature range. It also shows anisotropy in its lattice thermal expansion. This causes microcracking as the sintered specimens are cooled, which results in degradation of the mechanical properties. In this work, the chemical stability, strength, and Young's modulus of Ba 1+x Zr 4 P 6–2x O 24 ( X = 0.25 and 0.5) ceramics at high temperatures have been determined. An attempt has been made to correlate the mechanical properties to the thermal expansion anisotropy.