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0.57(Bi0.8La0.2)FeO3-0.43PbTiO3 (BLF-PT) ceramics were successfully prepared by sol-gel technique combined with solid-state reaction method. X-ray diffraction (XRD) results revealed that single crystallites with rhombohedral phase could be obtained at 600 °C for 2 h, which is 150 °C lower than that required to prepare single phase material with the same composition from solid-state reactions. The...
In this study, the effects of preparation process on the properties of lead magnesium niobate (PMN) based electrostictive materials, such as phase structure, microstructure and electrical property, are investigated and discussed. The results of experiment show the powder samples, fabricated by a modified two-step synthesis method with alkaline-earth metal dopants introduced in the preparation of common...
In this research, by adding methyl alcohol/water solution with certain concentration into sol to hydrolysis directly and sintering the fresh gel directly, lead titanate ceramics doped with calcium are prepared by using calcium acetate as doper to prohibit the disadvantages contained in conventional sol-gel method, such as low hydrolytic rate, high sintering temperature, long preparation period. The...
The Samarium-modified, lead titanate ceramics with a composition of (Pb/sub 0.67/Ca/sub 0.15/Sr/sub 0.06/Sm/sub 0.08/) (Ti/sub 0.98/Mn/sub 0.02/)O/sub 3/ were prepared by conventional mixed-oxide method. By properly varying the sintering and poling conditions, the samples with zero temperature coefficient of resonant frequency were fabricated. The piezoelectric and dielectric properties were measured;...
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