Influence of ZnO additions to 0.8(Mg0.95Co0.05)TiO3-0.2Ca0.6La0.8/3TiO3 ceramics on sintering behavior and microwave dielectric properties

Yuan Bin Chen, Cheng Liang Huang, Shih Hung Lin

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20 Citations (Scopus)


The effects of ZnO addition on the microstructures and microwave dielectric properties of 0.8(Mg0.95Co0.05)TiO3-0.2Ca0.6La0.8/3TiO3 ceramics were investigated. ZnO was selected as liquid phase sintering aids to lower the sintering temperature of 0.8(Mg0.95Co0.05)TiO3-0.2Ca0.6La0.8/3TiO3 ceramics. With ZnO additives, the densification temperature of 0.8(Mg0.95Co0.05)TiO3-0.2Ca0.6La0.8/3TiO3 can be effectively reduced from 1450 to 1200-1325 °C. The crystalline phase exhibited no phase difference at low addition levels (0.25-2 wt.%). It is found that low-level doping of ZnO (0.25-2 wt.%) can significantly improve the density and dielectric properties of 0.8(Mg0.95Co0.05)TiO3-0.2Ca0.6La0.8/3TiO3 ceramics. The quality factors Q × f were strongly dependent upon the amount of additives. Q × f values of 36 000 and 13 000 GHz could be obtained at 1200-1325 °C with 1 and 2 wt.% ZnO additives, respectively. During all additives ranges, the relative dielectric constants were significantly different and ranged from 23.1 to 27.96. The temperature coefficient varies from 14.1-24.3 ppm/°C.

Original languageEnglish
Pages (from-to)3591-3595
Number of pages5
JournalMaterials Letters
Issue number29-30
Publication statusPublished - 2006 Dec 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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