Pb(Zr0.95Ti0.05)O3 powders synthesized by Pechini method: Effect of molecular weight of polyester on the phase and morphology
Pb(Zr0.95Ti0.05)O3 powders synthesized by Pechini method: Effect of molecular weight of polyester on the phase and morphology
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DOI：
10.1007/s10971-006-1509-3
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发表时间：
2007-02
影响因子：
2.5
通讯作者：
Shaojun Qiu;H. Fan;Xiaodong Zheng
中科院分区：
文献类型：
--
作者：
Shaojun Qiu;H. Fan;Xiaodong Zheng
研究了柠檬酸和乙二醇聚合形成的聚酯分子量对Pechini法制备的富锆钛酸铅Pb（Zr0.95Ti0.05）O3粉体的相形成和团聚的影响。用红外光谱法研究了柠檬酸与金属离子螯合作用的演变过程。采用粉末X射线衍射和扫描电子显微镜研究了在400 ~ 800°C煅烧2 h的粉体的相行为和形貌。柠檬酸和乙二醇的摩尔比可以影响羧酸基团与金属离子之间的螯合作用，但对Pb（Zr0.95Ti0.05）O3的形成没有影响。由柠檬酸和乙二醇形成的高分子量聚酯有助于最终晶相的形成，并得到软团聚颗粒的Pb（Zr0.95Ti0.05）O3粉体。
Several experiments were conducted to examine the effects of the molecular weight of polyesters formed by polymerization of citric acid and ethylene glycol on the development of phase formation and agglomerate of Zr-riched lead zirconate titanate Pb (Zr0.95Ti0.05)O3powders prepared by the Pechini method. Evolvement of the chelation of citric acid and metallic ions was detected by FTIR spectroscopy. Phase behavior and morphology of powders calcined at temperature range of 400 to 800°C for 2 h were studied by powder X-ray diffraction and scanning electron microscopy. The molar ratio of citric acid and ethylene glycol could affect the chelation between carboxylate groups and metallic ions but had no effect on the formation of Pb(Zr0.95Ti0.05)O3. Higher molecule weight of polyester formed from citric acid and ethylene glycol could help the formation of the final crystalline phase and gave soft agglomerate particles of Pb(Zr0.95Ti0.05)O3powders.