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    • H Sharma

      Articles written in Bulletin of Materials Science

    • Volume 25 Issue 2 April 2002 pp 133-136 Ceramic Materials

      Synthesis, structure and characterization of ceramic Ca4Bi2Ti4Nb6O30

      H Sharma Kiran Kumari L S Singh R N P Choudhary

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      The polycrystalline samples of Ca4Bi2Ti4Nb6O30 (herein designated CBTN) were synthesized by the conventional ceramic method. Preliminary X-ray structural study of the compound showed the formation of a single phase solid solution having orthorhombic structure in the paraelectric phase. Measurements of the dielectric constant (𝜀') and dielectric loss (tan 𝛿) as a function of temperarure (-180-200°C) at 1 kHz and 10 kHz and also as a function of frequency (102 Hz to 104 Hz) at five different temperatures [-180°C, -40°C, -10°C, 26°C (room temperature) and 75°C] have shown a dielectric anomaly and a phase transition at -13 ± 1°C in CBTN.

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