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Positive Temperature Coefficient of Resistivity in Donor-Doped BaTiO3 Ceramics derived from Nanocrystals synthesized at Low Temperature

Authors

  • R. L. Brutchey,

    1. Institute for Collaborative Biotechnologies, California Nanosystems Institute, and Materials Research Laboratory, The University of California, Santa Barbara, Santa Barbara, CA 93106-9610 (USA)
    2. Present address: Prof. R. L. Brutchey, Department of Chemistry, University of Southern California, Los Angeles, CA 90089-0744 (USA)
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  • G. Cheng,

    1. Institute for Collaborative Biotechnologies, California Nanosystems Institute, and Materials Research Laboratory, The University of California, Santa Barbara, Santa Barbara, CA 93106-9610 (USA)
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  • Q. Gu,

    1. Institute for Collaborative Biotechnologies, California Nanosystems Institute, and Materials Research Laboratory, The University of California, Santa Barbara, Santa Barbara, CA 93106-9610 (USA)
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  • D. E. Morse

    1. Institute for Collaborative Biotechnologies, California Nanosystems Institute, and Materials Research Laboratory, The University of California, Santa Barbara, Santa Barbara, CA 93106-9610 (USA)
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  • This work was supported in part by grants from the U.S. Army CERDEC contract W15P7T-06-A402, U.S. Dept. of Energy (DE-FG03-02ER46006), the Institute for Collaborative Biotechnologies through grant DAAD19-03-D-0004 from the U.S. Army Research Office, and the MRSEC Program of the National Science Foundation under award DMR05-20415 to the UCSB Materials Research Laboratory. We thank Dr. Hisashi Tsukamoto for his inspiration and guidance, and Dr. Ed Plichta for his support that together made this work possible.

Abstract

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Small, donor-doped Ba1-xLaxTiO3nanocrystals are successfully prepared for the first time. These nanocrystals are suitable precursors for small-grain Ba1-xLaxTiO3 ceramics with a sizeable positive temperature coefficient of resistivity (PTCR) that is comparable to that of traditional large-grain ceramics derived from solid-state routes.

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