(Ba,Pb)TiO_3的水热合成

Hydrothermal Synthesis of (Pb, Ba)TiO_3

以醋酸钡和钛酸四丁酯为原料,在温和的水热条件下成功地制备出四方结构BaTiO_3和纯钙钛矿结构PbTiO_3,以及固溶体(Ba,Pb)TiO_3.与氯离子和硝酸根离子比较,醋酸根离子更有利于BaTiO_3晶粒的增大.以活性的钛酸四丁酯作为钛源,200℃～240℃的碱液中,即会有四方相BaTiO_3的形成,高填充度也能促进四方相BaTiO_3的形成.

Tetragonal BaTiO3, perovskite - typed PbTiO3 and (Ba, Pb)TiO3 solid solution have been prepared from barium (lead) acetate and tetrabutyl titanate under milder hydrothermal condition. As compared with chlorion and nitrate ion, acetate ion would accelerate the formation of great - grained particles of BaTiO3 more considerably. The tetragonal BaTiO3 could be synthesized by adopting reactive titanium source, tetrabutyl titanate, in alkali aqueous solution atas low as 200℃~ 240℃. The higher degree of fill would promote the production of tetragonal BaTiO3.