Oxyhydrides of (Ca,Sr,Ba)TiO3 Perovskite Solid Solutions

被引：76

作者：

Sakaguchi, Tatsunori ^{[1
]}

Kobayashi, Yoji ^{[1
]}

Yajima, Takeshi ^{[1
]}

Ohkura, Masatoshi ^{[1
]}

Tassel, Cedric ^{[1
,2
]}

Takeiri, Fumitaka ^{[1
]}

Mitsuoka, Shingo ^{[1
]}

Ohkubo, Hiroshi ^{[1
]}

Yamamoto, Takafumi ^{[1
]}

Kim, Jung Eun ^{[3
]}

Tsuji, Naruki ^{[3
]}

Fujihara, Akihiko ^{[3
]}

Matsushita, Yoshitaka ^{[4
]}

Hester, James ^{[5
]}

Avdeev, Maxim ^{[5
]}

Ohoyama, Kenji ^{[6
]}

Kageyama, Hiroshi ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Nishikyo Ku, Kyoto 6158510, Japan

[2] Kyoto Univ, Hakubi Ctr Adv Res, Sakyo Ku, Kyoto 6068302, Japan

[3] SPring 8 JASRI, Sayo, Hyogo 6795198, Japan

[4] Natl Inst Mat Sci, NIMS Beamline Stn SPring 8, Sayo, Hyogo 6795148, Japan

[5] Australian Nucl Sci & Technol Org, Bragg Inst, Menai, NSW 2234, Australia

[6] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

INORGANIC CHEMISTRY | 2012年 / 51卷 / 21期

基金：

日本学术振兴会;

关键词：

CRYSTAL-STRUCTURE; TRANSITION; SYSTEM;

D O I：

10.1021/ic300859n

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The oxyhydride solid solutions (Ca,Sr)TiO3-xHx and (Sr,Ba)TiO3-xHx have been prepared by reducing the corresponding ATiO(3) oxides with calcium hydride. Under the reaction conditions examined, a hydride content of x = 0.1-0.3 was obtained for all compositions. Compared to our previous result with BaTiO3-xHx, the larger particle size in this study (20-30 mu m vs 170 nm) resulted in a somewhat lower hydride amount despite prolonged reaction times. We examined changes in cell volume, octahedral tilt angle, and site occupancy of different anion sites after conversion to oxyhydrides; it appears that these oxyhydrides fit the geometrical descriptions typical for regular ABO(3) perovskites quite well. The hydrogen release temperature, previously shown to be indicative of the hydride exchange temperature, however, does not scale linearly with the A-site composition, indicating a potential effect of chemical randomness.

引用

页码：11371 / 11376

页数：6

共 27 条

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