By adding methyl alcohol/water solution with certain concentration into sol to hydrolysis
directly and sintering the fresh sol directly, lead titanate(PbTiO3) ceramics doped with magnesium
are prepared by using magnesium 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 purely and
high density magnesium 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 doped lead
titanate ceramics exhibite excellent dielectric, ferroelectric and pyroelectric properties compare with
pure lead titanate.
Sol-gel processing and physic-chemical characterization of La and Ce doped lead titanate ceramics