Theoretical design and experimental study of hydrothermal synthesis of KNbO3

被引：14

作者：

Han, Xiangyun ^{[1
,2
]}

Zhang, Duanming ^{[1
]}

Zhong, Zhicheng ^{[1
]}

Yang, Fengxia ^{[1
]}

Wei, Nian ^{[1
]}

Zheng, Keyu ^{[1
]}

Li, Zhihua ^{[1
]}

Gao, Yihua ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 01期

基金：

中国国家自然科学基金;

关键词：

electronic materials; chemical synthesis; phase equilibria;

D O I：

10.1016/j.jpcs.2007.08.053

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

In the framework of the Lencka-Riman thermodynamic model, we give a theoretical design for the hydrothermal synthesis of pure KNbO3 powder in a K-Nb-O tri-component system, where the stability yield diagrams and the optimum conditions (i.e., synthesis temperature, precursor concentrations, solution pH) are provided. Additionally, a hydrothermal experiment is carried out to synthesize KNbO3 powder by reacting niobium pentoxide with potassium hydroxide at a temperature above 523 K and highly alkaline conditions. It is found that the experiment is in great agreement with the theoretical design. This research shows that the newly developed Lencka-Riman model is a powerful theoretical tool for designing hydrothermal synthesis of new materials. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：193 / 198

页数：6

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