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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。
A new method for preparation of porous titanium was proposed. Titanium dioxide with pore structure was firstly prepared by the method of occupancy, and then reduced and leached by calcium vapor to obtain porous titanium. The pore structure of porous titanium dioxide was investigated by means of X-ray diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy and mercury intrusion porosimetry, respectively. The effect of pore-forming agent type, pore former addition amount, sintering temperature, Calcium vapor reduction has been prepared with a porous structure of porous titanium. The experimental results show that the order of the porosity of porous titanium dioxide prepared by adding different pore-forming agents is: citric acid> starch> graphite; the porosity of samples increases first and then decreases when sintering temperature ranges from 800 ℃ to 1100 ℃ , The pore distribution is more uniform when the starch is a pore-forming agent; the prepared porous titanium dioxide is reduced and the obtained porous titanium has a certain pore structure; and as the porosity of the porous titanium dioxide increases, the obtained porous titanium surface Faces increase, porous titanium structure more loose.