Order-Disorder Transition and Microwave Dielectric Properties of Ba (Ni_<1/3>Nb_<2/3>) O_3 Ceramics

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概要

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• Order-disorder transition of Ba (Ni_<1/3>Nb_<2/3>) O_3 ceramics was investigated using X-ray diffraction, transmission electron microscopy, and energy-dispersive spectroscopy. Before sintering samples were pre-fired at 1300℃ for 100 h to achieve higher chemical homogeneity. A transition from ordered to disordered state was observed at1500℃ and the transition was accompanied by the formation of liquid phases. The chemical compositions of liquid phases were analyzed using energy-dispersive spectroscopy. Microwave dielectric properties of ordered and disordered samples were measured using the post resonator method and the transmission cavity method. Variations of dielectric properties such as relative permittivity, quality factor, and temperature coefficient of resonant frequency with sintering temperature were discussed in terms of order-disorder transition, liquid-phase sintering, defect concentration, and grain size.

• 社団法人応用物理学会の論文
• 1995-08-15

著者

• CHUNG Su

  Department of Inorganic Materials Engineering, Seoul National University

• Chung Su

  Department Of Inorganic Materials Engineering Seoul National University

• Kim In-tae

  Ceramics Division Korea Institute Of Science And Technology

• Kim Yoon-ho

  Ceramics Division Korea Institute Of Science And Technology

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