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Sintered compacts of nano and micron-sized BaTiO3: Dramatic influence on the microstructure and dielectric properties

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Abstract

Sintered compacts of nano-sized and micron-sized BaTiO3 show sharp ferroelectric transition and high dielectric constant at specific compositions. The sintered compacts with 1 wt% nano-BaTiO3 show a maximum dielectric constant of 1680. At the transition temperature (Tc) there are two maxima at 0.5 and 2 wt%. The variation in the dielectric constant at Tc is also reflected in the behavior of the ferroelectric transition as studied by differential scanning calorimetry. This interesting oscillatory variation of the dielectric constant and dielectric loss with increase in the amount of nanoparticles in the sintered compacts is observed for the first time. The variation of the dielectric properties and the ferroelectric transition of the sintered compacts could be related to subtle changes in the microstructure.

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Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi, 110016, India

    Vishnu Shanker, Tokeer Ahmad & Ashok K. Ganguli

  2. Department of Chemistry and Biochemistry, Center for Materials Research and Education, Rowan University, Glassboro, New Jersey, 08028, USA

    Henry Ip

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  1. Vishnu Shanker
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  2. Tokeer Ahmad
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  3. Henry Ip
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  4. Ashok K. Ganguli
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Correspondence to Ashok K. Ganguli.

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Shanker, V., Ahmad, T., Ip, H. et al. Sintered compacts of nano and micron-sized BaTiO3: Dramatic influence on the microstructure and dielectric properties. Journal of Materials Research 21, 816–822 (2006). https://doi.org/10.1557/jmr.2006.0102

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