Cation ordering/disordering kinetics in Ba3CoNb2O9:: An in situ study using synchrotron x-ray powder diffraction

被引：7
|
作者：
Mallinson, P. M. [1 ]
Claridge, J. B.
Rosseinsky, M. J.
Ibberson, R. M.
Wright, J. P.
Fitch, A. N.
Price, T.
Iddles, D. M.
机构：
[1] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England
[2] Rutherford Appleton Lab, ISIS Facil, STFC, Didcot OX11 0QX, Oxon, England
[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[4] Powerwave UK Ltd, Wolverhampton WV10 7DB, England
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 22期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1063/1.2817527
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In situ synchrotron x-ray powder diffraction has been used to study the kinetics of cation ordering and disordering in the microwave dielectric electroceramic Ba(3)CoNb(2)O(9) with a time resolution of 15 s. The method enables the order/disorder temperature (T(o/d)) in this material of 1430 degrees C to be directly observed. The changes in the rate and degree of cation ordering and in the growth of ordered domains between samples ordered from standard precursor material and then subsequently reordered following an annealing period above T(o/d) show that small changes in precursor order state and phase assemblage strongly influence the final domain size. (c) 2007 American Institute of Physics.
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页数：3
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