Characteristics of high-Q microwave dielectric ceramics Nd(Co1/2Ti1/2)O3 with CuO addition

Cheng Liang Huang, Ching Fang Tseng

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We report the microwave dielectric properties and the microstructures of Nd(Co1/2Ti1/2)O3 ceramics prepared by the conventional solid-state route. The prepared Nd(Co1/2Ti1/2)O3 exhibits a mixture of Co and Ti showing a 1:1 order in the B site. Lowering the sintering temperature (as low as 1260°C) and promoting the densification of Nd(Co1/2Ti1/2)O3 ceramics could be effectively achieved by adding CuO (up to 0.75 wt%). At 1350°C, Nd(Co1/2Ti1/2)O3 ceramics with 0.5 wt% CuO addition possess a dielectric constant (εr) of 27.6, a Q × f value of 165 000 GHz (at 9 GHz), and a temperature coefficient of resonant frequency (τf) of -20 ppm/°C. By comparing with pure Nd(Co1/2Ti1/2)O3 ceramics, incorporating additional CuO helps to render a dielectric material with a higher dielectric constant, a smaller τf value, and a 20% dielectric loss reduction, which makes it a very promising candidate for applications requiring low microwave dielectric loss.

Original languageEnglish
Pages (from-to)2409-2414
Number of pages6
JournalJournal of the American Ceramic Society
Issue number8
Publication statusPublished - 2007 Aug 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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