Bulk and conductive mode investigations of Pb free PTCR ceramics with high switch temperature
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- ZUBAIR Mohammad A.
- Graduate School of Science and Technology, Tokyo Institute of Technology Materials Science Centre, School of Materials, University of Manchester
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- TAKEDA Hiroaki
- Graduate School of Science and Technology, Tokyo Institute of Technology
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- LEACH Colin
- Materials Science Centre, School of Materials, University of Manchester
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- FREER Robert
- Materials Science Centre, School of Materials, University of Manchester
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- HOSHINA Takuya
- Graduate School of Science and Technology, Tokyo Institute of Technology
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- TSURUMI Takaaki
- Graduate School of Science and Technology, Tokyo Institute of Technology
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Lead free positive temperature coefficient of resistivity (PTCR) thermistors with switching temperature TS of 155°C were synthesized from 0.95BaTiO3–0.05(Bi1/2K1/2)TiO3 solid solution for high temperature applications, utilizing the conventional ceramic fabrication technique, which involved sintering ceramics in N2 flow followed by air annealing. Addition of sintering aid AST (Al2O3:SiO2:TiO2 with 4:9:3 molar ratio) and Mn improved the bulk PTCR response. Impedance spectroscopy analysis confirmed the bulk TS and revealed a third ferroelectric resistance-capacitance (RC) element along with a semiconducting grain and PTCR active ferroelectric grain boundary. The investigation of local electrical activity adopting hot-stage conductive mode microscopy revealed the existence of type-I grain boundary-electron beam induced current (GB-EBIC) contrast pertinent to the presence of negatively charged interfaces neighbored with compensating positive space-charge layers typical of double Schottky barrier within the Pb free PTCR system.
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 121 (1411), 268-272, 2013
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680263607296
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- NII論文ID
- 130004950823
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- NII書誌ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL書誌ID
- 024290994
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
- KAKEN
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