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    • Keywords


      Glass ceramics; microstructure; crystallization

    • Abstract


      Glass of the nominal composition 64 wt%(SrO·TiO2)·35 wt%(2SiO2·B2O3)-1 wt%(CoO) was prepared. The glass samples were subjected to heat treatment at 900 and 950 C. The phase progression in these glass ceramics from X-ray diffraction studies shows the formation of Sr2B2O5 as primary crystalline phase followed by rutile (TiO2), Sr3Ti2O7, SrB2Si2O8 and Sr3B2SiO8 as secondary phases. The first DTA exothermic peak of glass corresponds to the crystallization of Sr2B2O5, rutile and Sr3Ti2O7 phase while second crystallization peak may be assigned to the formation of SrB2Si2O8 and Sr3B2SiO8 phases. From microstructure studies we find that strontium borate grows with larger grain size whereas the other phases like Sr3Ti2O7, TiO2 appear smaller in size. Cobalt oxide content in the strontium titanate borosilicate glass ceramic gives the thermal stability to dielectric behaviour and decreases the dielectric loss.

    • Author Affiliations


      O P Thakur1 Devendra Kumar1 O M Parkash1 2 Lakshman Pandey1 3

      1. Department of Ceramic Engineering, Institute of Technology, Banaras Hindu University, Varanas - 221 005, India
      2. School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanas - 221 005, India
      3. Department of Post Graduate Studies and Research in Physics, Rani Durgavati Vishwavidyalaya, Jabalpur - 482 001, India
    • Dates

  • Bulletin of Materials Science | News

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