Oxide-Ion Conductivity Enhancement of Polycrystalline Lanthanum Silicate Oxyapatite Induced by BaO Doping and Grain Alignment
Oxide-Ion Conductivity Enhancement of Polycrystalline Lanthanum Silicate Oxyapatite Induced by BaO Doping and Grain Alignment
复制标题
BaO 掺杂和晶粒排列诱导多晶硅酸镧氧磷灰石的氧离子电导率增强
DOI:
10.1021/acs.cgd.6b00638
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发表时间:
2016
影响因子:
3.8
通讯作者:
and H. Yoshida
中科院分区:
文献类型:
--
作者:
K. Fukuda;R. Watanabe;M. Oyabu;R. Hasegawa;T. Asaka;and H. Yoshida
We prepared thec-axis-oriented polycrystal of BaO-doped lanthanum silicate oxyapatite (LSO) by a reactive diffusion technique. The sandwich-type ternary diffusion couple, which was made up of La2SiO5/[BaO-doped La2Si2O7+ BaO-doped LSO]/La2SiO5, was heated at 1873 K for 100 h. The thin-plate polycrystalline electrolyte was mechanically extracted from the inner part of the annealed couple and characterized by optical microscopy, transmission electron microscopy, electron probe microanalysis (EPMA), X-ray diffractometry (XRD), Raman spectroscopy, and impedance spectroscopy. On the basis of the numbers of cations determined by EPMA and structural data refined by single-crystal XRD, the chemical formula of the constituent crystallites was determined to be (La9.32Ba0.28)(Si5.87□0.13)O26, where □ denotes a vacancy in the Si site. The combined use of BaO-doping and grain-alignment techniques effectively improved the oxide-ion conductivity, which steadily increased from 2.17 × 10–2to 1.42 × 10–1S cm–1as the temperature increased from 723 to 1023 K. The activation energy of conduction was 0.48 eV.
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DOI:
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发表时间:
2013
期刊:
影响因子:
--
作者:
M. Okabe;T. Asaka;K. Fukuda;A. Berghout;E. Bechade;O. Masson;I. Julien and P. Thomas
通讯作者:
I. Julien and P. Thomas
DOI:
--
发表时间:
2014
期刊:
影响因子:
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作者:
原 晋次;大藪 雅之;浅香 透;福田 功一郎
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福田 功一郎
影响因子:
4.6
作者:
P. Mallinson;Z. Gál;S. Clarke
通讯作者:
S. Clarke
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
影响因子:
2.8
作者:
M. Macatrão;M. Santos;C. Alves;F. Oliveira;T. Marcelo;J. Mascarenhas;B. Trindade
通讯作者:
B. Trindade