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Bulletin of Materials Science

, Volume 8, Issue 1, pp 13–21 | Cite as

Microstructural and dielectric behaviour of glass ceramics in the system PbO-BaO-TiO2-B2O3-SiO2

  • OM Parkash
  • Devendra Kumar
  • R Rajgopalan
Article

Abstract

Glasses in the system PbO-BaO-TiO2-B2O3-SiO2 with and without P2O5 as nucleant have been prepared. The glass samples were ceramized based ondta studies. The ferroelectric phase crystallizing out has been found to be BaTiO3 fromxrd. The optical and scanning electron micrographs show the presence of BaTiO3 as major phase. In these glass ceramic samples, dielectric constant and dissipation factor are approximately constant with temperature and frequency upto the glass transition temperatureT g and thereafter increase sharply with temperature and finally level off. The addition of P2O5 as nucleant and molar ratio of (PbO + BaO) to TiO2 has marked influence on the dielectric behaviour and composition of ferroelectric phase crystallizing out.

Keywords

Microstructure dielectric behaviour glass ceramic differential thermal analysis 

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Copyright information

© Indian Academy of Sciences 1986

Authors and Affiliations

  • OM Parkash
    • 1
  • Devendra Kumar
    • 1
    • 2
  • R Rajgopalan
    • 1
  1. 1.School of Materials Science and TechnologyBanaras Hindu UniversityVaranasiIndia
  2. 2.Department of Ceramic Engineering, Institute of TechnologyBanaras Hindu UniversityVaranasiIndia

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