| 용융염합성법에 의한 Nb2O5 첨가 BaTiO3의 PTCR 효과 |
| 윤기현, 정해원, 윤상옥 |
| 연세대학교 요업공학과 |
| PTCR Effects In Nb2O5 Doped BaTiO3 Ceramics Prepared By Molten Salt Synthesis Method |
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| ABSTRACT |
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The effects of flux KCl and dopant Nb2O5 on the PTCR characteristics of BaTiO3 prepared by molten salt synthesis method have been investigated. As the amount of dopant Nb2O5 is over the solubility limit in BaTiO3, the room-temperature resistivity increases, and the PTCR effect and the grain size decrease. The variation of the amount of flux KCl slightly influences on the room-temperature resistivity, PTCR effect and grain size in Nb2O5 doped BaTiO3, but BaTiO3 ceramics prepared by the method of molten salt synthesis show larger PTCR effect than those of conventional calcining of mixed oxides. |
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