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Effect of Fluxing Additive on Sintering Temperature, Microstructure and Properties of BaTiO3
Bulletin of Materials Science
  • Yaseen Iqbal, University of Peshawar
  • Asad Jamal, University of Peshawar
  • Riaz Ullah, University of Peshawar
  • M. Naeem Khan, University of Peshawar
  • Rick Ubic, Boise State University
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Various fluxing materials are added to technical ceramics in an attempt to lower their sintering temperatures and make their processing economical. The effect of 0·3wt% Li2CO3 addition on the phase, microstructure, phase transition temperatures and dielectric properties of BaTiO3 was investigated in the present study. The addition of 0·3wt% Li2CO3 was observed to lower the optimum sintering temperature by ∼200◦C with no second phase formation and cause a five-fold reduction in grain size. Rhombohedral-to-orthorhombic and tetragonal-to-cubic phase transitions at the expected temperatures were evident from the Raman spectra, but the orthorhombic-totetragonal phase transition was not clearly discernible. The persistence of various phase(s) at higher temperatures in the flux-added materials indicated that the phase transitions occurred relatively slowly. A decrease in dielectric constant of Li2O-added BaTiO3 in comparison to pure BaTiO3 may be due to the diminished dielectric polarizability of Li+ in comparison to Ba2+.
Copyright Statement

This document was originally published by Indian Academy of Sciences in Bulletin of Materials Science. Copyright restrictions may apply. DOI: 10.1007/s12034-012-0306-6

Citation Information
Yaseen Iqbal, Asad Jamal, Riaz Ullah, M. Naeem Khan, et al.. "Effect of Fluxing Additive on Sintering Temperature, Microstructure and Properties of BaTiO3" Bulletin of Materials Science (2012)
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