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Resistance degradation behavior of Ca-doped BaTiO_3

机译：Ca掺杂BaTiO_3的电阻降解行为

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摘要

Resistance degradation of Ca-doped BaTiO_3 ceramics was investigated. A series of coarse and fine-grained (Ba_(1-x)Ca_x)TiO_3 with only Ba site incorporation ranging x from 0 to 0.1, and Ba(Ti_(1_y)Ca_y)O_3 ceramics with only Ti site incorporation ranging y from 0 to 0.015, were prepared with similar grain sizes. The increase of x did not cause any distinct difference in degradation, whereas an increase in y caused a significant resistance degradation in both coarse and fine-grained specimens. The variation of ionic transference number (t_(ion)) as evaluated by the Warburg impedance was negligible with increase in x, but significantly increased with the increase in y. These results demonstrate that the decrease of lattice parameters and lattice shrinkage by the Ba site incorporation of Ca has little influence on the resistance degradation, and that the oxygen vacancy concentration generated by the Ti site incorporation of acceptor Ca is a very important factor that governs resistance degradation.
机译：研究了Ca掺杂的BaTiO_3陶瓷的电阻衰减。一系列粗和细晶粒（Ba_（1-x）Ca_x）TiO_3，其中Ba位置掺入的x范围为0到0.1，以及Ba（Ti_（1_y）Ca_y）O_3陶瓷中Ti位置掺入的唯一y范围为0至0.015，制备具有相似的晶粒尺寸。 x的增加并没有引起任何明显的降解差异，而y的增加导致粗粒和细粒样品的电阻均显着降低。通过Warburg阻抗评估的离子迁移数（t_（ion））的变化随x的增加可忽略不计，但随y的增加而显着增加。这些结果表明，掺入Ca的Ba位点导致的晶格参数的减小和晶格收缩对电阻的降低影响很小，并且接受体Ca的Ti位点的引入产生的氧空位浓度是控制电阻的重要因素。降解。

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  • 来源
    《Journal of Materials Research》 |2010年第11期|p.2135-2142|共8页
  • 作者

    Seok-Hyun Yoon; Sung-Hyung Kang; Sang-Hoon Kwon; Kang-Heon Hur;

  • 作者单位

    LCR R&D Group, LCR Division, Samsung Electro-Mechanics Co. Ltd., Suwon,Gyunggi-Do, 443-743 Korea;

    rnLCR R&D Group, LCR Division, Samsung Electro-Mechanics Co. Ltd., Suwon,Gyunggi-Do, 443-743 Korea;

    rnLCR R&D Group, LCR Division, Samsung Electro-Mechanics Co. Ltd., Suwon,Gyunggi-Do, 443-743 Korea;

    rnLCR R&D Group, LCR Division, Samsung Electro-Mechanics Co. Ltd., Suwon,Gyunggi-Do, 443-743 Korea;

  • 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);
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  • 正文语种 eng
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