Preparation, Structure, and Electrical Conductivity of Calcium-Antimonate-Based Materials

V. V. Zyryanov; V. G. Ponomareva; G. V. Lavrova

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Preparation, Structure, and Electrical Conductivity of Calcium-Antimonate-Based Materials

机译：锑酸钙基材料的制备，结构和电导率

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Metastable antimony(V) oxide compounds are prepared via mechanochemical reactions in mixtures of CaO and Sb_2O_3, followed by mild oxidizing heat treatment and calcium leaching in a hydrochloric acid solution, and are characterized by x-ray diffraction and thermal analysis. The synthesized compounds have the pyrochlore structure or a monoclinic pyrochlore-like structure (Ca_(16)Sb_8~(3+) Sb_8~(5+) O_(48)). Doping with fluorine slows down subsequent oxidation, while doping with lanthanum impedes calcium leaching. The composition and morphology of the powders (nanopores and core-shell microstructure of the grains) determine their properties: water release in a broad temperature range, proton conductivity, and low absorption capacity for Na~+ ions. In hydrogen atmosphere, the reduction of antimony decreases their conductivity.

机译：通过在CaO和Sb_2O_3的混合物中进行机械化学反应，然后在盐酸溶液中进行轻度氧化热处理和钙浸出，制备亚稳态氧化锑（V）化合物，并通过X射线衍射和热分析对其进行表征。合成的化合物具有烧绿石结构或类单斜烧绿石结构（Ca_（16）Sb_8〜（3+）Sb_8〜（5+）O_（48））。掺氟会减慢随后的氧化，而掺镧会阻碍钙的浸出。粉末的组成和形态（纳米颗粒的纳米孔和核壳微结构）决定了它们的性能：宽温度范围内的水分释放，质子传导性以及对Na〜+离子的低吸收能力。在氢气气氛中，锑的还原会降低其电导率。

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来源
《Inorganic materials》 |2006年第4期|p.410-417|共8页
作者
V. V. Zyryanov; V. G. Ponomareva; G. V. Lavrova;
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作者单位

Institute of Solid-State Chemistry and Mechanochemistry, Siberian Division, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128 Russia;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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Preparation, Structure, and Electrical Conductivity of Calcium-Antimonate-Based Materials

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