Direct calciothermic reduction of porous calcium titanate to porous titanium
Direct calciothermic reduction of porous calcium titanate to porous titanium
复制标题
多孔钛酸钙直接钙热还原为多孔钛
DOI：
10.1016/j.msec.2018.05.027
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Yang Bin
中科院分区：
文献类型：
--
作者：
Lei Xianjun;Xu Baoqiang;Yang Guobo;Shi Tengteng;Liu Dachun;Yang Bin
提出了以多孔钛酸钙（CaTiO 3）为原料，采用钙热还原法制备金属钛粉和多孔钛的冶金材料一体化概念。采用钙蒸气还原法在1273 K下还原6 h制备了多孔金属钛，在钛样品中制备了两种类型的连通孔。多孔CaTiO_3中继承了50-300 μm的连通大孔，而5-40 μm的微孔则是由还原产物中的副产物CaO溶出而形成的。在CaO-CaCl 2熔盐混合物中，采用自烧结法制备了内部连通性良好的多孔钛，多孔钛的厚度约为155 μm，孔隙率为65- 81%。
A metallurgical material integration concept, using porous calcium titanate (CaTiO3) as raw material, was put forward for preparation of metallic titanium powder and porous titanium by calciothermic reduction. Porous metallic titanium was prepared by calcium vapor reduction at 1273 K for 6 h with two types of interconnected pores in titanium samples. The interconnected macropores about 50–300 μm were inherited from porous CaTiO3, and the micropores about 5–40 μm were made by leaching removal of byproduct CaO in reduction products. Metallic porous titanium was fabricated in Ca-dissolved CaO-CaCl2molten salt mixtures by self-sintering and had a good interconnectivity inside with thickness about 155 μm and the porosities of the porous titanium are 65–81%.