Interceram - International Ceramic Review

, Volume 63, Issue 4–5, pp 216–219 | Cite as

Microwave Dielectric Characteristics of Calcium Titanate-Lithium Lanthanum Titanate Ceramics

  • A. E. Reda
  • D. M. Ibrahim
  • E. R. Souya
  • D. A. Abdel AzizEmail author
High-Performance Ceramics


The microwave dielectric characteristics, microstructure and physical properties of (1−x)CaTiO3−x(Li0.5La0.5)TiO3 (0.08≤x≤0.9) ceramics (abbreviated 92CT-LLT through 10CT-LLT) prepared by conventional solid-state routes were investigated. Increasing the proportion of (Li0.5La0.5)TiO3 compared to CaTiO3 decreased the sintering temperature of ceramic bodies by 50°C, with achievement of optimum density at 1200°C and formation of dense microstructure due to liquid phase development. In the (1−x)CT−xLLT system, the microwave dielectric properties can be effectively controlled by varying the (Li0.5La0.5)TiO3 content to form favourable secondary phase and microstructure. The best combination of microwave dielectric characteristics was obtained in samples of 50CT-LLT ceramic (x = 0.5) sintered at 1200°C/2 h, with dielectric constant εr = 14.1, low dielectric loss = 0.000021 and quality factor Qxf = 364, 524 at 8 GHz.


microwave dielectric properties calcium titanate lithium lanthanum titanate 


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Copyright information

© Springer Fachmedien Wiesbaden 2014

Authors and Affiliations

  • A. E. Reda
    • 1
  • D. M. Ibrahim
    • 1
  • E. R. Souya
    • 2
  • D. A. Abdel Aziz
    • 1
    Email author
  1. 1.Ceramic DepartmentNational Research CentreCairoEgypt
  2. 2.Chemistry Department, Faculty of ScienceAin Shams UniversityCairoEgypt

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