论文部分内容阅读
通过调控酸碱浓度,在水热条件下得到了金红石、锐钛矿、板钛矿、钛酸钠等一系列TiO2/钛酸盐产物.对上述TiO2、酸洗处理后的钛酸盐等一系列不同晶型、不同形貌的样品进行焙烧处理,系统性地研究焙烧温度的逐渐升高对产物晶型转变和形貌演化的规律性影响.给出了水热酸碱浓度以及焙烧温度两个因素与TiO2/钛酸盐纳米材料晶型和形貌变化行为关系的二维示意图.依据奥斯特瓦尔德阶梯规则、经典热力学理论以及定向附着生长机理,对TiO2/钛酸产物的晶型晶体生长、晶型转变和形貌演化机理进行了探讨.
A series of TiO2 / titanate products such as rutile, anatase, brookite and sodium titanate were obtained under hydrothermal conditions by controlling the concentration of acid and alkali. Series of samples with different crystal forms and morphologies were calcined to systematically investigate the regularity of the regularity of the transformation and morphological evolution of the product by the increase of calcination temperature.According to the experimental results, According to the Osterwald ladder rule, classical thermodynamics theory and directional attachment growth mechanism, the crystal structure of TiO2 / titanate product Crystal growth, crystal transition and morphological evolution mechanism were discussed.