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Publication
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| Research Title |
Nonlinear CurrentVoltage Properties and Giant Dielectric Response in Novel (Na1/3Ca1/3Y1/3)Cu3Ti4O12 Ceramics Prepared by a Simple Sol-Gel Method |
| Date of Distribution |
5 December 2016 |
| Conference |
| Title of the Conference |
The 10th Asian Meeting on Electroceramics (AMEC2016) |
| Organiser |
National Taipei University of Technology Institute of Materials Science and Engineering |
| Conference Place |
GIS TAIPEI TECH Convention center, Taipei |
| Province/State |
Taiwan |
| Conference Date |
4 December 2016 |
| To |
7 December 2016 |
| Proceeding Paper |
| Volume |
- |
| Issue |
- |
| Page |
- |
| Editors/edition/publisher |
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| Abstract |
Recently, CaCu3Ti4O12 and ACu3Ti4O12related materials (where A = Y2/3, Na1/2Y1/2 and Na1/2Bi1/2 etc) have gained considerable interest both scientifically and technologically because of their giant dielectric permittivity values (103105). Unfortunately, the loss tangent (tan) values of these ceramics are still too large (>0.05), which unsuitable for practical applications. In this work, we have successfully prepared a new isostructural CaCu3Ti4O12type perovskite, (Na1/3Ca1/3Y1/3)Cu3Ti4O12, using a simple solgel method. Dense ceramic microstructure was obtained. The effects of electrode materials, DC bias and heat treatment in different atmospheres on the dielectric and electrical properties were systematically investigated. Xray absorption near edge structure (XANES) and Xray photoelectron (XPS) analyses confirmed the coexistence of Cu+, Cu3+, and Ti3+ ions in (Na1/3Ca1/3Y1/3)Cu3Ti4O12 ceramics, exhibiting the complex mechanisms of conduction inside the grains. Interestingly, the sintered (Na1/3Ca1/3Y1/3)Cu3Ti4O12 ceramic exhibited a low tan of <0.05 with large 104. Nonlinear current densityelectric field properties were investigated. Using an impedance spectroscopy under different temperatures, a large conduction activation energy of the grain boundary with relatively low activation energy for conduction inside the grain was obtained. The giant dielectric properties of (Na1/3Ca1/3Y1/3)Cu3Ti4O12 were described by the MaxwellWagner relaxation model. |
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| Peer Review Status |
ไม่มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Journal Publication
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