金红石晶种的X射线衍射分析及其转化率测定

X Ray Diffraction Analysis of Rutile Seed and Determination of Its Conversion Rate

中文关键词:  X射线衍射法  绝热法定量  金红石晶种  转化率  相变

英文关键词:XRD  adiabatic method  rutile seed crystal  conversion rate  phase transformation

中文摘要:

      介绍了一种钛白粉生产过程中金红石晶种的转化率测定方法.通过X射线衍射法（XRD）分析金红石晶种物相组成：金红石型TiO₂（R）、锐钛型TiO₂（A）、NaCl.在样品预处理过程中，通过控制体系的pH值靠近金红石晶种等电点，经离心脱盐，消除了金红石晶种中NaCl（111）面对金红石（110）面衍射峰的重叠干扰，同时提高低含量锐钛体积分数，采用"绝热法"定量测定了晶种的金红石转化率.

英文摘要:

      A method for the determination of the conversion rate of rutile seed in the production process of titanium dioxide is introduced. The phase composition of rutile seed, i. e., Rutile(R), Anatase(A) and NaCl was analyzed by the X-ray diffraction(XRD) method. In the sample pretreatment, by controlling pH of the system near the isoelectric point of rutile seed and centrifugal desalination, the overlapping interference of the diffraction peaks of NaCl (111) on the surface of rutile (110) was eliminated, and the volume fraction of low content titanium anatase was increased. The rutile conversion rate of crystal seeds was determined quantitatively by the "adiabatic method".