Enhanced microwave-assisted sintering of X7R ceramic dielectrics for use in multilayer capacitors

A. B. McInroy, A. T. Rowley, R. Freer

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A hybrid furnace, allowing the simultaneous application of microwave (2.45 GHz) and radiant energy, has been used to investigate the sintering of a commercial X7R powder commonly used in multilayer capacitors. Samples were processed at temperatures in the range 1060-1120 °C. Enhanced sintering has been observed in the form of accelerated densification when a microwave field is applied. At 1090 °C for example, 99.4% dense material was obtained by microwave-assisted heating but only 96.9% density was reached by conventional heating. The relative permittivity of the microwave sintered material was ∼2200, typically 10%, higher than for conventionally sintering. The Curie temperature was lower by 5 °C in the microwave heated samples. © 2010 Elsevier Ltd and Techna Group S.r.l.
    Original languageEnglish
    Pages (from-to)2007-2010
    Number of pages3
    JournalCeramics International
    Volume36
    Issue number6
    DOIs
    Publication statusPublished - Aug 2010

    Keywords

    • A. Microwave processing
    • BaTiO3
    • Dielectric
    • E. Capacitor

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