摘要
以醋酸铅和钛酸丁酯为原料,乙二醇单甲醚为溶剂,分别用溶胶 凝胶直接水解法和溶胶 凝胶水热合成法制备纳米晶体PbTiO3,用XRD、TEM、Raman、ICP和氮吸附表面积测量等测试手段对纳米PbTiO3进行了分析。单纯sol gel直接水解法(无酸催化)合成样品经400℃处理后仍为无定形结构,但同样条件下经溶胶 凝胶水热过程处理过的样品经400℃热处理可得到形状均一,颗粒较小,平均粒径在20～30nm左右,具有单相钙钛矿结构的钛酸铅纳米粉。在sol gel酸性条件下水解合成的样品300℃形成晶相,但颗粒分布不均匀,经400℃处理的样品平均粒径在50nm左右。
Lead titanate nanocrystal was synthesized using sol-gel and hydrothermal method with lead acetate and tetrabutyl titanate as precursors and methoxyethanol as solvent. Process control and its effects on properties of product were checked by techniques of XRD, TEM, Raman spectroscopy. ICP and surface area measurement. The results show that the method of sol-gel direct hydrolysis, no acid added as catalyst, results in amorphous powder, even calcined at 400°C. While the sol-gel hydrothermal method, without acid addition but the gel was hydrothermally treated at 180°C. gives uniform nanocrystal of perovskite lead titanate with average size of -20 nm after calcination at 400°C. Nanocrystal PbTiO3 with average size of -50 nm can be obtained by sol-gel acidic hydrothermal process and calcination at 300°C, but the resultant displayed much more wider size distribution.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2003年第1期51-52,共2页
Journal of Functional Materials
基金
国家"九五"攀登资助项目(G25)
关键词
溶胶-凝胶法
水热合成法
纳米晶
钛酸铅
Acids
Amorphous materials
Calcination
Hydrolysis
Hydrothermal synthesis
Lead compounds
Nanotechnology
Raman spectroscopy
Sol
gels
