A potassium titanate-Ti_3 C_2 T_x nanocomposite was synthesized using a facile, low-temperature and environmentally friendly process. The morphology and micro structure of the as-prepared samples were analyzed by mean...A potassium titanate-Ti_3 C_2 T_x nanocomposite was synthesized using a facile, low-temperature and environmentally friendly process. The morphology and micro structure of the as-prepared samples were analyzed by means of XRD, SEM, TEM, and XPS. The tribological property of the nanocomposite as additive in base oil was evaluated. The results reveal that the in-situ formed potassium titanate nanowires with average diameter of 30 nm and the uniform distribution on the surface of Ti3 C2 Tx nanosheets.Compare to Ti_3 C_2 T_x nanosheets, the average friction coefficient and wear scar width of the oil containing potassium titanate-Ti_3 C_2 T_x nanocomposites are decreased by 4.9% and 22% under the same conditions.The excellent tribological performance is attributed to the synergic effects of the two components in the nanocomposite structure.展开更多
Potassium titanate （K4Ti3O8） was synthesized by the reaction between ilmenite and concentrated KOH solution in the atmosphere of nitrogen,still air,and oxygen,respectively.The obtained samples were systematically in...Potassium titanate （K4Ti3O8） was synthesized by the reaction between ilmenite and concentrated KOH solution in the atmosphere of nitrogen,still air,and oxygen,respectively.The obtained samples were systematically investigated by X-ray diffraction （XRD）,inductively coupled plasma optical emission spectrometer （ICP-OES）,and scanning electron microscopy （SEM）.XRD results indicate that K4Ti3O8 have been synthesized in different atmospheres.The oxidizing atmosphere could enhance the conversion rate of Ti from ilmenite to K4Ti3O8,and Fe（II） is easily oxidized to trivalent iron Fe（III） during the reaction.Furthermore,SEM images show that the different atmospheres have significant effect on K4Ti3O8 crystal morphology and particle size.Well shaped K4Ti3O8 crystals are obtained in nonoxidizing atmosphere.展开更多
基金supported by the Opening Fund of Key Laboratory of Harbin Institute of Technology
文摘A potassium titanate-Ti_3 C_2 T_x nanocomposite was synthesized using a facile, low-temperature and environmentally friendly process. The morphology and micro structure of the as-prepared samples were analyzed by means of XRD, SEM, TEM, and XPS. The tribological property of the nanocomposite as additive in base oil was evaluated. The results reveal that the in-situ formed potassium titanate nanowires with average diameter of 30 nm and the uniform distribution on the surface of Ti3 C2 Tx nanosheets.Compare to Ti_3 C_2 T_x nanosheets, the average friction coefficient and wear scar width of the oil containing potassium titanate-Ti_3 C_2 T_x nanocomposites are decreased by 4.9% and 22% under the same conditions.The excellent tribological performance is attributed to the synergic effects of the two components in the nanocomposite structure.
基金supported by the National Key Technologies R&D Program (No. 2006BAC02A05)the National Basic Research Program of China (No.2007CB613501)+1 种基金the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KGCX2-YW-214)the Special Funds of "Mountain Tai Scholar" Construction Project and BHP Billiton LTD
文摘Potassium titanate （K4Ti3O8） was synthesized by the reaction between ilmenite and concentrated KOH solution in the atmosphere of nitrogen,still air,and oxygen,respectively.The obtained samples were systematically investigated by X-ray diffraction （XRD）,inductively coupled plasma optical emission spectrometer （ICP-OES）,and scanning electron microscopy （SEM）.XRD results indicate that K4Ti3O8 have been synthesized in different atmospheres.The oxidizing atmosphere could enhance the conversion rate of Ti from ilmenite to K4Ti3O8,and Fe（II） is easily oxidized to trivalent iron Fe（III） during the reaction.Furthermore,SEM images show that the different atmospheres have significant effect on K4Ti3O8 crystal morphology and particle size.Well shaped K4Ti3O8 crystals are obtained in nonoxidizing atmosphere.
