Structural Behaviour of Solid Solutions in the NdAlO3-SrTiO3 System

被引:2
|
作者
Ohon, Natalia [1 ]
Stepchuk, Roman [1 ]
Blazhivskyi, Kostiantyn [1 ]
Vasylechko, Leonid [1 ]
机构
[1] Lviv Polytechn Natl Univ, 12 Bandera St, UA-79013 Lvov, Ukraine
来源
NANOSCALE RESEARCH LETTERS | 2017年 / 12卷
关键词
Perovskite aluminates and titanates; Crystal structure; Solid solution; Phase transition; MICROWAVE DIELECTRIC-PROPERTIES; STRONTIUM-TITANATE; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; ELECTRON-GAS; CERAMICS; SRTIO3; LA; ND;
D O I
10.1186/s11671-017-1937-8
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Single-phase mixed aluminates-titanates Nd1-xSrxAl1-xTixO3 (x = 0.3 / 0.9) were prepared from stoichiometric amounts of constituent oxides Nd2O3, Al2O3, TiO2 and strontium carbonate SrCO3 by solid-state reaction technique in air at 1773 K. Crystal structure parameters of Nd1-xSrxAl1-xTixO3 were refined by full-profile Rietveld refinement in space groups R (3) over bar c (x = 0.3, 0.5, 0.7 and 0.8) and Pm (3) over bar m (x = 0.9). Comparison of the obtained structural parameters with the literature data for the end members of the system NdAlO3 and SrTiO3 revealed formation of two kinds of solid solutions Nd1-xSrxAl1-xTixO3 with the cubic and rhombohedral perovskite structure. Morphotropic rhombohedral-to-cubic phase transition in Nd1-xSrxAl1-xTixO3 series occurs at x = 0.84. Based on the results obtained as well as the literature data for the parent compounds, the tentative phase diagram of the NdAlO3-SrTiO3 pseudo-binary system have been constructed.
引用
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页数:4
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