SYNTHESIS, STRUCTURE, LUMINESCENT AND MECHANICAL PROPERTIES OF YNbxTa1-xO4 SOLID SOLUTIONS

被引：2

作者：

Shcherbina, O. B. ^{[1
]}

Masloboeva, S. M. ^{[1
]}

Palatnikov, M. N. ^{[1
]}

Efremov, V. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Kola Sci Ctr, Subdiv Fed Res Ctr, Tananaev Inst Chem, Apatity, Russia

来源：

JOURNAL OF STRUCTURAL CHEMISTRY | 2021年 / 62卷 / 11期

关键词：

ceramics; luminescence; solid solutions; microstructure; crack resistance; MEASURING FRACTURE-TOUGHNESS; INDENTATION TECHNIQUES; ELASTIC-MODULUS; YTTRIUM;

D O I：

10.1134/S002247662111007X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of mixed yttrium tantalo-niobates (YNbxTa1-xO4, x = 0-1) is obtained by the sol-gel synthesis. It is shown that the temperature of this synthesis of YNbxTa1-xO4 and its duration are much lower than those in the solid-phase synthesis. The properties of both synthesized powders and ceramic solid solutions (SSs) YNbxTa1-xO4, x = 0-1, prepared based on them, are investigated. It is found that under UV excitation at any Nb:Ta ratio in YNbxTa1-xO4 SSs the luminescent signal is enhanced as compared to that in individual YNbO4 and YTaO4 compounds, which is caused by energy transfer between the Nb4+-O- and Ta4+-O- luminescence centers. Morphological features of the microstructure of ceramic YNbxTa1-xO4 SSs are studied. Mechanical characteristics of ceramic YNbxTa1-xO4 SSs, such as Young's modulus and the stress intensity factor for mode 1 K-IC, which is a criterion of the material crack resistance, are estimated.

引用

页码：1715 / 1722

页数：8

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