PbTiO_3纳米晶的制备及表征

Synthesis and Characterization of PbTiO 3 Nanocrystalline

以硬脂酸、乙酸铅和钛酸丁酯为原料用硬脂酸凝胶法合成ＰｂＴｉＯ３纳米晶原粉，利用改进的烧结设备，同时采用Ｎ２气氛下预烧，通过调节Ｎ２和Ｏ２的流量控制烧结气氛，得到粒径重复性好的ＰｂＴｉＯ３纳米晶。用差热分析，热重分析和Ｘ－射线衍射对合成过程进行了研究；用透射电镜考查纳米晶的粒度和形貌，用５ＤＸ－红外光谱仪对ＰｂＴｉＯ３纳米晶的红外透射谱进行了测试分析。

Using stearic acid,lead acetate and tetrabutyl titanate as raw materials,the raw powder of PbTiO 3 nanocrystalline was synthesized by stearic acid gel method (SAG). The raw powder was sintered in the apparatus improved by us and the calcining temperature was controlled automatically. The first stepsinter was done in nitrogen atmosphere. The PbTiO 3 nanocrystalline which had good repeatability could be obtained after the second step sinter by controlling the flow of nitrogen and oxygen. The synthesis was investigated by DTA,TG and XRD. The size and shape was tested by TEM.The nanocrystalline PbTiO 3 sample was also characterized by IR.