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      https://www.ias.ac.in/article/fulltext/boms/016/06/0679-0684

    • Keywords

       

      Ferroelectrics; dielectric constant; pyroelectric coefficient

    • Abstract

       

      Modified ceramics (Pb1−xCax)[(Mn0·5W0·5)0·10Ti0·90]O3 have been fabricated forx=0, 0·05, 0·10 and 0·15 by high temperature solid state reaction technique. XRD, SEM, DTA and electrical studies of the sample withx=0·10 have been performed. These studies show that the sample is homogeneous single phase perovskite type with tetragonal structure. The phase transition occurs at 330°C. Electrical behaviour of other samples have also been investigated as a function of frequency (1 kHz to 1 MHz) and temperature (26°C to 300°C). The samples withx=0·05 and 0·10 have low loss, low dielectric constant, and show negligible pyroelectric effect. The sample withx=0·15 has minimum values ofɛ and loss which are temperature independent up to about 200°C. It also shows good pyroelectric behaviour. Hence it may be of use in pyroelectric infrared sensors.

    • Author Affiliations

       

      K Prasad1 R Sati1 R N P Choudhary1 2 T P Sinha1 3

      1. University Department of Physics, Bhagalpur University, Bhagalpur - 812 007, India
      2. Department of Physics, Indian Institute of Technology, Kharagpur - 721 302, India
      3. S.S.M.P. Division, Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Calcutta - 700 064, India
    • Dates

       
  • Bulletin of Materials Science | News

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