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分别采用钛酸四丁酯(无水乙醇作为溶剂)和稳定的四氯化钛(蒸馏水作为溶剂)为两种钛源,以加糖热解法[1]在不同的温度下处理得到二氧化钛粉体,并利用扫描电镜和X射线衍射对粉体微观结构和晶型进行分析。结果表明,两种制备方法得到的粉体晶粒尺寸均一,在50nm左右。而锐钛矿和金红石型的成相温区存在明显差异:前者在300到500℃之间合成出较纯的锐钛矿相,600到700℃之间完成锐钛矿到金红石型的晶相转变;后者300℃就已经形成较好的锐钛矿结晶相,晶相转变发生在700到900℃之间。而两种方法的成相温度均低于一般方法。
Titanium tetrabutoxide (absolute ethanol as solvent) and stable titanium tetrachloride (distilled water as solvent) were used as the two titanium sources, respectively, and treated with different temperature to obtain titanium dioxide powder The microstructure and crystal structure of the powder were analyzed by scanning electron microscopy and X-ray diffraction. The results show that the powder obtained by the two methods has a uniform grain size of about 50 nm. However, there are obvious differences between the anatase and rutile phase-forming temperature zones: the former synthesizes relatively pure anatase phase from 300 to 500 ℃ and the anatase to rutile phase from 600 to 700 ℃ Transformation; the latter has formed a better anatase crystalline phase at 300 ℃, the phase transition occurs between 700 and 900 ℃. The phase transition temperatures of the two methods are lower than the general method.