MIXED TCR BEHAVIOUR OF GD-DOPED BaTiO3 CERAMICS WITH SINTERING AIDS

Gama S.B.¹, Raibagkar R.L.²*
¹Department of Post Graduate Studies and Research in Materials Science, Gulbarga University, Gulbarga-585106 (Karnataka) India.
²Department of Post Graduate Studies and Research in Materials Science, Gulbarga University, Gulbarga-585106 (Karnataka) India.
* Corresponding Author : rlraibagkar@rediffmail.com

Received : -     Accepted : -     Published : 15-06-2010
Volume : 1     Issue : 1       Pages : 20 - 23
World Res J Appl Phys 1.1 (2010):20-23

Conflict of Interest : None declared
Acknowledgements/Funding : One of the authors (GSB) would like to thank University Grant Commission, New Delhi for award of FIP

Polycrystalline perovskite ceramics of composition (Ba1-xGdx)TiO3, (0.001≤x≤0.005) with sintering aids were prepared by solid state reaction technique. Temperature coefficient of resistivity (TCR) behaviour was studied in the temperature range 300C to 3000C. It is observed that, inclusion of sintering aids lowered the sintering temperature and the room temperature resistivity (ρRT) and also enhances the positive TCR (PTCR) at the ferroelectric Curie temperature, Tc. PTCR property begins from room temperature and remains up to Tc, thereafter show NTCR behaviour, with nearly same range of TCR values for all the samples, which shows the improved TCR properties due to sintering aids in the Gd-doped BaTiO3 ceramics.

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