由铅、钛乙醇盐配合物制备纳米PbTiO_3粉体

Preparation of Nanocrystalline PbTiO_3 Powder by Lead and Titanium Ethoxide Complexes

在0.03 mol/L (Bu4N)Br的乙醇溶液中, 电解钛片4 h, 然后电解铅片2 h, 每隔30 min加入0.1 mL乙酰丙酮, 制得铅、钛金属醇盐. 采用红外、拉曼光谱测试结果表明, 纳米PbTiO3前驱体结构中含有acac-(乙酰丙酮基), 可以有效克服团聚现象. 经差热-热重分析、 X射线衍射、电子透射显微镜测试表明, 凝胶经乙醇洗涤、真空干燥24 h后粒径为10 nm; 700 ℃煅烧2 h制得纳米PbTiO3粉体, 粒径在10～15 nm.

The precursor (PbTi(OCH_2CH_3)_(6-y)(acac)_y) of nanocrystalline (PbTiO_3) was prepared by the electrochemical dissolution of titanium for 4 h at 50 and then of lead for 2 h at 40 in an ethanol solution of (0.03) mol/L (Bu_4N)Br. IR and Raman spectroscopy were used to investigate the structure of the precursor. The results show that the precursor contained acac group, which could prevent the precursor from gathering. TG-DT, XRD, and TEM were used to investigate the structure of nano-sized PbTiO_3. The xerogel of 10 nm was obtained by drying in vacuum for 24 h. (PbTiO_3) with a narrow size distribution of 10~15 nm was prepared by heating it at 700 for 2 h.