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Thermal Expansion of Solid Solutions in the ZrTiO 4 —In 2 O 3 —M 2 O 5 (M = Sb, Ta) System
Author(s) -
Ikawa Hiroyuki,
Shimojima Hiromasa,
Urabe Kazuyori,
Fukunaga Osamu
Publication year - 1991
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.1151-2916.1991.tb07806.x
Subject(s) - thermal expansion , solid solution , crystallography , volume (thermodynamics) , materials science , analytical chemistry (journal) , thermal , chemistry , thermodynamics , physics , metallurgy , chromatography
Axial and dilatometric thermal expansions and phase transformations were studied for solid solutions having the α‐PbO 2 structure in the ZrTiO 4 —In 2 O 3 —M 2 O 5 (M = Sb, Ta) system with nominal formulas of Zr x Ti y In z Sb z O 4 and Zr x Ti y In z Ta z O 4 where x + y + 2 z = 2. With increased substitution of z , the cell volume increased, the difference in the b parameters at room temperature between those quenched from 1400° and 1000°C decreased, and the thermal expansion decreased. The axial thermal expansion of ZrTi y In z · Ta z O 4 with z = 0.3 was almost identical with that of HfTiO 4 , and those with z = 0.4 and z = 0.45 were smaller than that of HfTiO 4 . Unit‐cell volumes of these compound were compared with those of single oxides to make it clear that the unit‐cell volume of ZrTiO 4 was small anomalously and to distinguish the normal and abnormal substitution systems. These results were explained by the working hypothesis proposed for these compounds.