Journal of Materials Science

, Volume 46, Issue 21, pp 6823–6829 | Cite as

The influences of firing temperatures and excess PbO on the crystal structure and microstructure of (Pb0.25 Sr0.75)TiO3 ceramics

  • Rattiphorn Sumang
  • Theerachai BongkarnEmail author


Polycrystalline samples of (Pb0.25Sr0.75)TiO3 (PST75) were prepared by the solid-state reaction method. The effects of firing temperatures and excess PbO on PST75 ceramics were investigated. The PST75 was calcined between 600 and 1000 °C for 3 h and the sintering temperature ranged between 1050 and 1250 °C for 2 h. The optimized calcination and sintering conditions were identified as 950 and 1250 °C, respectively. The lattice parameter c increased, while the lattice parameter a decreased with increased firing temperatures. The average particle size and average grain size increased with increased firing temperatures. After the addition of PbO—excess 0, 1, 3, 5, and 10 wt%—in the PST75 samples, the lattice parameter a decreased. The average particle size and the average grain size increased with the increase of PbO. The porous microstructure slightly decreased with an increasing amount of PbO—up to 3 wt%—then slightly increased with the higher excess PbO. The density was improved by adding 3 wt% of excess PbO. A low dielectric loss was observed from the 3 wt% excess PbO sample.


Sinter Temperature Calcination Temperature Perovskite Phase Thermo Gravimetric Analysis SrCO3 



This study was financially supported by the Thailand Research Fund (TRF), Commission on Higher Education (CHE) and The Royal Golden Jubilee Ph.D. Program. The authors wish to thanks the Science Lab Center, Faculty of Science, Naresuan University for supporting facilities. Thanks are also given to Mr. Don Hindle for his help in editing the manuscript.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Physics, Faculty of ScienceNaresuan UniversityPhitsanulokThailand

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