多孔二氧化钛制备及其钙热还原的研究

发布时间：2018-03-29 04:16

  本文选题：多孔二氧化钛　切入点：多孔钛　出处：《真空科学与技术学报》2017年03期

【摘要】：提出了多孔钛制备的新方法,先采用占位体法制备出具有一定孔结构的二氧化钛,而后通过钙蒸气还原、浸出,获得多孔钛。借助X射线衍射、扫描电镜、X射线能谱仪、压汞仪等检测手段分别考察了造孔剂种类、造孔剂添加量、烧结温度、升温速率等对多孔二氧化钛孔结构的影响;并且通过钙蒸气还原制备出了具有一定孔结构的多孔钛。实验结果表明:添加不同种类造孔剂制备出的多孔二氧化钛的孔隙率大小的顺序为:柠檬酸淀粉石墨;烧结温度区间在800℃~1100℃时,样品的孔隙率呈现先上升后下降的趋势;淀粉为造孔剂时,获得更加均匀的孔分布;将所制备的多孔二氧化钛还原,所得到的多孔钛具有一定孔隙结构,并且随着多孔二氧化钛孔隙率的增大,所得多孔钛表面孔增多,多孔钛结构更加疏松。
[Abstract]:A new method for the preparation of porous titanium was put forward. Titanium dioxide with a certain pore structure was prepared by the method of space-occupying body, then it was reduced by calcium vapor and leached to obtain porous titanium. By means of X-ray diffraction, scanning electron microscope (SEM) was used to obtain X-ray energy spectrometer. The effects of the type of pore-forming agent, the amount of pore-making agent, the sintering temperature and the heating rate on the pore structure of porous titanium dioxide were investigated by means of mercurimeter. The porous titanium with certain pore structure was prepared by calcium vapor reduction. The experimental results show that the order of porosity of porous titanium dioxide prepared by adding different kinds of pore-making agents is: citric acid starch graphite; At the sintering temperature range of 800 鈩，

本文编号：1679513