The Preparation of Lead Strontium Titanate Ceramics by the Combustion Method

In this work, (Pb1-xSrx)TiO3 (PST) ceramics with 0.25 ≤ x ≤ 0.75 were successfully prepared by the combustion method. The calcination and sintering temperatures were 800°C–1050°C and 1050°C–1250°C for 2 h, respectively. A single perovskite phase of the PST powders was found with calcination temperatures above 1000°C. The samples were indexed in a tetragonal system when x = 0.25. The lattice parameter c and c/a ratio increased while, the lattice parameter a decreased with increasing firing temperatures. For x = 0.75, the samples were indexed in a cubic phase and the lattice parameter a decreased with an increase in the firing temperatures. The samples were indexed in a tetragonal and cubic phase coexist when x = 0.50. The pure perovskite phase was found in all the sintered pellet samples. The average particle size and average grain size tended to increase with increasing calcining and sintering temperatures. The maximum density was 7.67, 6.52 and 5.59 g/cm3 obtained from the samples sintered at 1150°C with...