Preparation of Potassium Tantalate Niobate by Sol–Gel Method
作者:
Shin‐ichi Hirano,
Toshinobu Yogo,
Ko‐ichi Kikuta,
Toshiyuki Morishita,
Yasuhiro Ito,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 6
页码: 1701-1704
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb04252.x
出版商: Blackwell Publishing Ltd
关键词: potassium;tantalates;niobates;thin films;sol–gel
数据来源: WILEY
摘要:
Perovskite potassium tantalate niobate (KTN) powders and thin films were synthesized from a metal alkoxide solution. Homogeneous KTN coating solutions were prepared from KOC2H5, Ta(OC2H5)5, and Nb(OC2H5)5in absolute ethanol. The precursor crystallized to pyrochlore at ∼ 650°C, and then to perovskite at ∼ 750°C, depending upon Ta:Nb ratio. H2O vapor during calcination was found to play a prominent role in the direct and predominant crystallization of perovskite films with preferred orientation. Highly oriented KTN films of perovskite structure were successfully prepared on MgO (100) substrates at
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