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Electrical investigations of holmium-doped BaTiO_3 derived from sol-gel combustion

机译：溶胶-凝胶燃烧衍生的掺-BaTiO_3的电学研究

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摘要

Holmium-doped BaTiO_3 with composition Ba_(0.97)Ho_(0.03)TiO_3 was prepared by sol-gel combustion method. A molar ratio of citrateitrate (CA/NO_3 = 1.3) was used to prepare nanopowders of (Ba,Ho)TiO_3. The structure and microstructure of (Ba,Ho)TiO_3 powders and ceramics were investigated. The ceramics exhibit a dielectric constant of about 4400 and dielectric loss (tan δ = 0.267) at 10 Hz, and at the Curie temperature (T_c =132 ℃). The remanent polarization and the coercive field of Ba_(0.97)Ho_(0.03)TiO_3 ceramics, at 1 kHz, were P_r = 6 μC/cm~2 and E_C = 0.75 kV/cm. The dielectric and ferroelectric behavior of the holmium-doped BaTiO_3 is influenced by the amphoteric character of Ho~(3+) ions.
机译：采用溶胶-凝胶燃烧法制备了掺Ba_（0.97）Ho_（0.03）TiO_3的掺BaBaTiO_3。柠檬酸/硝酸盐的摩尔比（CA / NO_3 = 1.3）用于制备（Ba，Ho）TiO_3纳米粉。研究了（Ba，Ho）TiO_3粉体和陶瓷的结构和微观结构。陶瓷在10 Hz和居里温度（T_c = 132℃）时的介电常数约为4400，介电损耗（tanδ= 0.267）。 Ba_（0.97）Ho_（0.03）TiO_3陶瓷在1 kHz时的剩余极化和矫顽场为P_r = 6μC/ cm〜2和E_C = 0.75 kV / cm。 〜掺杂的BaTiO_3的介电和铁电行为受Ho〜（3+）离子的两性特性影响。

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  • 来源
    《Journal of Materials Research》 |2010年第6期|1057-1063|共7页
  • 作者

    Marin Cernea; Carmen Galassi; Bogdan S. Vasile; Paul Ganea; Roxana Radu; Georgiana Ghita;

  • 作者单位

    National Institute for Materials Physics, RO-77125, Magurele-Bucharest, Romania;

    rnCNR-ISTEC, Research Institute of Science and Technology for Ceramics,National Research Council, Faenza, Italy;

    rnUniversity Politehnica of Bucharest, RO-060042, Bucharest, Romania;

    rnNational Institute for Materials Physics, RO-77125, Magurele-Bucharest, Romania;

    rnNational Institute for Materials Physics, RO-77125, Magurele-Bucharest, Romania;

    rnNational Institute for Materials Physics, RO-77125, Magurele-Bucharest, Romania;

  • 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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