Glycothermal preparation of potassium niobate ceramic particles under supercritical conditions
Resource
Materials Letters 55 (1-2): 121-125
Journal
Materials Letters
Journal Issue
55
Pages
121-125
Date Issued
2002
Date
2002
Author(s)
Abstract
Potassium niobate KNbO3 particles were synthesized via a newly developed glycothermal process using isopropanol as the reaction medium in supercritical environment. Increasing the concentration of KOH and the molar ratio of K+/Nb5+ substantially facilitated the formation of KNbO3. When the concentration was 0. 5 M and the molar ratio of K+/Nb5+ was greater than 2:1, well crystallized monophasic KNbO3 was successfully produced at as low as 250 °C. In comparison with the traditional hydrothermal process, the supercritical glycothermal process greatly reduced the required concentration of KOH. This supercritical glycothermal process provides a new prospective approach for synthesizing electronic ceramic powders at low temperatures. © 2002 Elsevier Science B.V. All rights reserved.
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journal article
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