| Research Title |
Effects of Nb5+ and Sc3+ co-doping ions on microstructure and dielectric properties of rutile TiO2 ceramics |
| Date of Distribution |
1 November 2017 |
| Conference |
| Title of the Conference |
The First Materials Research Society of Thailand International Conference (1st MRS Thailand International Conference) |
| Organiser |
Materials Research Society of Thailand |
| Conference Place |
The Empress Convention Center |
| Province/State |
Chiang Mai |
| Conference Date |
30 November 2017 |
| To |
3 November 2017 |
| Proceeding Paper |
| Volume |
2017 |
| Issue |
1 |
| Page |
42 |
| Editors/edition/publisher |
|
| Abstract |
In this work, the effects of donor (Nb5+) and acceptor (Sc3+) dopants on the microstructure and dielectric properties of rutile-TiO2, (Sc0.5Nb0.5)xTi1-xO2 (x = 0.01, 0.025, 0.05 and 0.1), were investigated. The (Sc0.5Nb0.5)xTi1-xO2 ceramics were prepared by a solid state reaction method and sintered in air at temperature 1300 oC for 5 h. Phase composition and microstructure of the (Sc0.5Nb0.5)xTi1-xO2 ceramics were studied. Lattice parameters increases with increasing Sc3+ and Nb5+ concentration (x). The microstructure slightly changes with increasing Sc3+ and Nb5+ concentration. High dielectric permittivities ( 2000-6000) and low loss tangents (tan 0.05-0.3) over wide ranges of temperature and frequency are obtained in the (Sc0.5Nb0.5)xTi1-xO2 ceramics. The excellent dielectric premittivities of ScNTO are achieved in the (Sc0.5Nb0.5)xTi1-xO2 ceramic with x = 0.1. The different electrical properties of grains and grain boundaries are observed using an impedance spectroscopy analysis. The excellent dielectric properties of the (Sc0.5Nb0.5)xTi1-xO2 ceramics were attributed to interfacial polarization.
Keywords: rutile-TiO2, donor, acceptor, dielectric permittivities, impedance spectroscopy
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| Author |
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| Peer Review Status |
ไม่มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Poster |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Publication
Journal Publication
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