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

页数：4

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