To develop an effective process for titanium powders production, a calciothermic reduction process of pigment titanium dioxide （w（TiO2）〉98%）, based on the preform reduction process （PRP）, was investigated by me...To develop an effective process for titanium powders production, a calciothermic reduction process of pigment titanium dioxide （w（TiO2）〉98%）, based on the preform reduction process （PRP）, was investigated by means of XRD, SEM and EDS. In this process, the mixture of TiO2 powder and CaC12 was pressed into pieces as feed preform and was reduced by calcium vapor. Titanium powders was recovered after leaching from the reduced preform with hydrochloric acid and deionized water. The results indicate when the mass ratio of CaC12 to TiO2 is about 1：4 and at a constant temperature of 1 273 K for 6 h in vacuum furnace, titanium powders with 99.55% purity by EDS analysis and irregular shape （8-15 μm in particle size） are obtained.展开更多
For the purpose of increasing the dispersion of anatase titanium dioxide(A-TiO2)in organic matrix, the surface organic modification of A-TiO2 with the modifier of sodium stearate and sodium oleate, respectively, was s...For the purpose of increasing the dispersion of anatase titanium dioxide(A-TiO2)in organic matrix, the surface organic modification of A-TiO2 with the modifier of sodium stearate and sodium oleate, respectively, was studied. The process condition of modification was optimized, the performance of modified A-TiO2 was characterized and the mechanism between modifier and A-TiO2 was analyzed. The main contents and results are as展开更多
基金Project(51004058) supported by the National Natural Science Foundation of ChinaProject(2011FB039) supported by the Natural Science Foundation of Yunnan Province,China
文摘To develop an effective process for titanium powders production, a calciothermic reduction process of pigment titanium dioxide （w（TiO2）〉98%）, based on the preform reduction process （PRP）, was investigated by means of XRD, SEM and EDS. In this process, the mixture of TiO2 powder and CaC12 was pressed into pieces as feed preform and was reduced by calcium vapor. Titanium powders was recovered after leaching from the reduced preform with hydrochloric acid and deionized water. The results indicate when the mass ratio of CaC12 to TiO2 is about 1：4 and at a constant temperature of 1 273 K for 6 h in vacuum furnace, titanium powders with 99.55% purity by EDS analysis and irregular shape （8-15 μm in particle size） are obtained.
文摘For the purpose of increasing the dispersion of anatase titanium dioxide(A-TiO2)in organic matrix, the surface organic modification of A-TiO2 with the modifier of sodium stearate and sodium oleate, respectively, was studied. The process condition of modification was optimized, the performance of modified A-TiO2 was characterized and the mechanism between modifier and A-TiO2 was analyzed. The main contents and results are as
