Hydrothermal Synthesis and Dielectric Properties of Lead Nickel Niobate Ceramics

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概要

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• Lead nickel niobate (Pb(Ni_<1/3>Nb_<2/3>)O_3) has been prepared by a newly developed hydrothermal process. During the hydrothermal reaction at 250℃, a pyrochlore phase is formed. After calcining the 250℃-hydrothermally derived precursors at 750℃, a monophasic Pb(Ni_<1/3>)Nb_<2/3>)O_3 compound is successfully produced. Increasing the hydrothermal temperature significantly facilitates the formation of the perovskite phase. In comparison with the solid-state reaction, the hydrothermal process not only reduces the temperature for synthesizing Pb (Ni_<1/3>Nb_<2/3>)O_3, but also decreases its particle size to the submicron range. The dielectric properties of Pb (Ni_<1/3>Nb_<2/3>)O_3 strongly depend on the electric field frequency. Increasing the field frequency results in an increase in the apparent Curie temperature, which is associated with a decrease in the maximum dielectric permittivity. The critical exponent and diffuseness calculated by a modified permittivity-temperature equation verify the relaxor characteristics of Pb (Ni_<1/3>Nb_<2/3>)O_3.

• 社団法人応用物理学会の論文
• 1999-09-30

著者

• Lu C‐h

  National Taiwan Univ. Taipei Twn

• Hwang W‐j

  National Taiwan Univ. Taipei Twn

• Lu Chung-Hsin

  Department of Chemical Engineering, National Taiwan University

• Hwang Wen-Jeng

  Department of Chemical Engineering, National Taiwan University

• Lu Chung-hsin

  Department Of Chemical Engineering National Taiwan University

関連論文

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