Abstract
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 changes of structure, microstructure, synthesis process and electric properties of modified ceramics are studied in detail. The sizes and morphology of high density calcium doped lead titanate nanocrystals thus obtained are observed by TEM photographs and the structures and affection of sintering temperature of to lattice constant and sizes of nanocrystals are detected by XRD. Electric properties detection results show that lead titanate ceramics doped with calcium exhibit excellent dielectric, ferroelectric and pyroelectric properties compare with pure lead titanate
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