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Effects of heat treatment on structural evolution and morphology of powder synthesized by the sol-gel method

机译:热处理对溶胶-凝胶法合成粉末结构演变和形貌的影响

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BaTi_5O_(11) powder was successfully prepared and characterized by the sol-gel method. The mechanisms of BaTi_5O_(11) formation were studied by the fourier transform infrared spectroscopy (FTIR). The IR absorption peaks confirm the existence of a substitution reaction with the chelating reagent corresponding to different modes of vibration characteristic of the acetate group. The X-ray diffraction (XRD) results showed that the formation of single-phase monoclinic BaTi_5O_(11) began at 700℃ and were stable up to 1100℃ in air. The particle sizes observed from scanning electron microscopy (SEM) are about 100 nm for a calcination temperature at 700℃ and 600 nm at 1100℃.
机译:成功制备了BaTi_5O_(11)粉末,并通过溶胶-凝胶法对其进行了表征。通过傅里叶变换红外光谱(FTIR)研究了BaTi_5O_(11)的形成机理。 IR吸收峰证实了与螯合剂的取代反应的存在,其对应于乙酸酯基团的不同振动模式。 X射线衍射(XRD)结果表明,单相单斜BaTi_5O_(11)的形成始于700℃,在空气中最高可稳定到1100℃。对于700℃下的煅烧温度,从扫描电子显微镜(SEM)观察到的粒径为约100nm,而在1100℃下为600nm。

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