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- Title
The influences of firing temperatures and excess PbO on the crystal structure and microstructure of (Pb Sr)TiO ceramics.
- Authors
Sumang, Rattiphorn; Bongkarn, Theerachai
- Abstract
Polycrystalline samples of (PbSr)TiO (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.
- Subjects
POLYCRYSTALS; CERAMICS; CERAMOGRAPHY; MICROMECHANICS; FIRING (Ceramics)
- Publication
Journal of Materials Science, 2011, Vol 46, Issue 21, p6823
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-011-5641-2