CaCu 3 Ti 4O 12/CaTiO 3 composite dielectrics: BaPb -free dielectric ceramics with high dielectric constants

Wataru Kobayashi, I. Terasaki

    Research output: Contribution to journalArticle

    91 Citations (Scopus)

    Abstract

    We have measured dielectric properties of Ca1+x Cu3-x Ti4 O12 (x=0, 0.1, 0.5, 1, 1.5, 2, 2.9 and 3), and have found that Ca2 Cu2 Ti4 O12 (a composite of Ca Cu3 Ti4 O12 and CaTi O3) exhibits a high dielectric constant of 1800 with a low dissipation factor of 0.02 below 100 kHz from 220 to 300 K. These are comparable to (or even better than) those of the PbBa -based ceramics, which could be attributed to a barrier layer of CaTi O3 on the surface of the Ca Cu3 Ti4 O12 grains. The composite dielectric ceramics reported here are environmentally benign as they do not contain BaPb.

    Original languageEnglish
    Article number032902
    JournalApplied Physics Letters
    Volume87
    Issue number3
    DOIs
    Publication statusPublished - 2005 Jul 18

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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