The effect of cation ordering and domain boundaries on low loss Ba(BI1/3BII2/3)O3 perovskite dielectrics revealed by high-angle annular dark-field scanning transmission electron microscopy (HAADF STEM)
The effect of cation ordering and domain boundaries on low loss Ba(BI1/3BII2/3)O3 perovskite dielectrics revealed by high-angle annular dark-field scanning transmission electron microscopy (HAADF STEM)
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高角度环形暗场扫描透射电子显微镜 (HAADF STEM) 显示阳离子排序和畴边界对低损耗 Ba(BI1/3BII2/3)O3 钙钛矿电介质的影响
DOI:
10.1016/j.jeurceramsoc.2014.03.007
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发表时间:
2014
影响因子:
5.7
通讯作者:
Azough F
中科院分区:
文献类型:
--
作者:
Azough F
High quality ceramics of Ba((Co0.7Zn0.3)1/3Nb2/3)O3(BCZN), Ba(Mg1/3Nb2/3)O3(BMN) and Ba(Mg1/3Ta2/3)O3(BMT) were prepared by the mixed oxide route using sintering temperatures up to 1620 °C. Products with a high degree of cation ordering exhibited dielectricQ×fvalues from 83,000 GHz (BCZN) to 360,000 GHz (BMT). High Resolution TEM and aberration-corrected scanning transmission electron microscopy (STEM) revealed ordering domains and type I, II and III boundary structures. High-Angle Angular Dark Field (HAADF) STEM images provided direct evidence of 1:2 ordering and stacking sequences, and the presence of disordered regions within domain boundaries. The exceptionally highQ×fvalues for BMT are associated with a high degree of B-site ordering and the removal of domain boundaries in large, single domain grains. The catastrophic degradation ofQ×fvalues in BMN after prolonged sintering is associated with formation of a lossy ferroelectric secondary phase (Ba3Nb2O8), and changes to composition and stoichiometry of BMN grains.
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DOI:
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发表时间:
2002
期刊:
影响因子:
--
作者:
C. H. Lei;S. Amelinckx;G. Tendeloo
通讯作者:
G. Tendeloo
DOI:
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发表时间:
2012
期刊:
影响因子:
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作者:
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通讯作者:
T. Kolodiazhnyi
DOI:
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发表时间:
2002
期刊:
影响因子:
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作者:
C. Lei;G. Vantendeloo;S. Amelinckx
通讯作者:
S. Amelinckx
DOI:
--
发表时间:
2005
期刊:
影响因子:
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作者:
英一 古賀;博紀 森分;健一 柿本;齊 大里
通讯作者:
齊 大里
DOI:
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发表时间:
1994
期刊:
影响因子:
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作者:
M. Furuya;A. Ochi
通讯作者:
A. Ochi