Dielectric Responses and Electrical Properties of CaCu
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概要
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Nanocrystalline CaCu<inf>3</inf>Ti<inf>4-x</inf>V<inf>x</inf>O<inf>12</inf>(x = 0, 0.025, and 0.05) powders with particle sizes of 100--200 nm were successfully synthesized using a poly(ethylene glycol) solution. All the ceramic samples exhibited the pure CaCu<inf>3</inf>Ti<inf>4</inf>O<inf>12</inf>phase. The grain size of CaCu<inf>3</inf>Ti<inf>4-x</inf>V<inf>x</inf>O<inf>12</inf>ceramics increased slightly as V doping ion concentration increased; whereas, the dielectric permittivity of the ceramics decreased slightly. The nonlinear current--voltage properties of CaCu<inf>3</inf>Ti<inf>4</inf>O<inf>12</inf>ceramics were improved significantly by substitution of V ions. Impedance spectroscopy analysis and investigation of non-ohmic electrical properties revealed that the electrical resistance of the grain boundary and breakdown electric field strength were markedly increased by substitution of V ions; whereas, electrostatic potential barrier height at grain boundaries decreased slightly.
- 2013-06-25
著者
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Chindaprasirt Prinya
Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand
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Maensiri Santi
School of Physics, Institute of Science, Suranaree University, Nakhon Ratchasima 30000, Thailand
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Sangwong Nuchjarin
Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
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Thongbai Prasit
Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
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Yamwong Teerapon
National Metal and Materials Technology Center (MTEC), Thailand Science Park, Pathumthani 12120, Thailand