Investigation of the formation mechanism of perovskite phase in (1-x)PST-xPT ceramics prepared by one-step-sintering-method

(1-x)Pb(Sc/sub 1/2/Ta/sub 1/2/)-xPbTiO/sub 3/ ceramics were synthesized by a conventional mixed-oxide processing (or named as one-step-sintering-method) sintered at 1100/spl deg/C/spl sim/1300/spl deg/C temperature. The XRD patterns showed the percent of the perovskite phase in the samples could be as high as 90%, the highest was up to 100% The perovskite forming impact factor F was defined as the times of tolerance factor and the percent of the ionic bonding in Pb(B/sub 1/, B/sub 2/)O/sub 3/ relaxor ferroelectrics. It was found that the calculated F's values can interpret very well our experimental results and the relative ease sequence of fabrication of the lead-based perovskite relaxor ferroelectrics.