Preparation and Dielectric Properties of Composition-Graded K(Ta, Nb)O3 Single Crystals

Hisanori Yamane, Koichiro Morita, Shunichi Kubota, Masahiko Shimada

    Research output: Contribution to journalArticlepeer-review


    Single crystals of perovskite-type solid solution, K(TaxNb1-z)O3, having composition gradient were prepared by non-equilibrium cooling from a melt with the composition x = 0.3. The size of the crystals was 1∼2 mm. Electron microprobe analysis revealed that Ta content was rich in the core region of the crystals and decreased gradually to the edges with increasing Nb content. The composition gradient depended on cooling procedure. The dielectric constant measured at 500 kHz was in the range from 1000 to 4000 at temperatures from 290 to 720 K. The temperature dependence of dielectric constant reflected the composition gradient in the crystals.

    Original languageEnglish
    Pages (from-to)257-261
    Number of pages5
    JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
    Issue number3
    Publication statusPublished - 1998 Mar


    • Dielectric constant
    • Functionally graded materials
    • Perovskite-type structure
    • Single crystal

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Metals and Alloys
    • Materials Chemistry


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