The deoiled asphalt as the carbon source and the ferrocene as the metal source and the catalyst precursor were chosen to synthesize iron-containing carbon microparticles through co-carbonization at the temperature of ...The deoiled asphalt as the carbon source and the ferrocene as the metal source and the catalyst precursor were chosen to synthesize iron-containing carbon microparticles through co-carbonization at the temperature of about 450℃ for 3 h. The resulting products were treated at 2 000 ℃ for 2 h. All samples were examined by high resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD）. The results show that the iron particles in the heat-treated material are completely coated by carbon. In addition to the fully filled carbon microparticles as well as hollow carbon ones, also form carbon fibers with hollow centers. The formation mechanism of the as-prepared products was discussed briefly.展开更多
During the Second world war, the Franco-British cooperation included the organization of purchasing missions for airnautical material in the States. On 25 november 1939, a Franco-British agreement was set up to organi...During the Second world war, the Franco-British cooperation included the organization of purchasing missions for airnautical material in the States. On 25 november 1939, a Franco-British agreement was set up to organize two purchasing missions in the United States under the control of a ＂Liaison Committee＂ supervised by the Treasury Secretary, Henry Morgenthau. Edouard Daladier, French Chief of Government, sent Ren6 Pleven to establish contacts with General Arnold （AirCorps）. The Franco-British financial contribution facilitated a main spurt in investments which help modernize the American products apparatus. First contacts were established on April 1940, to be delivered in September. While France had not be able to benefit from significant part of these orders, Great Britain would take over some units that were originally allocated to France. These contracts would later facilitate the development of transatlantic cooperation.展开更多
基金National Basic Research Program of China (2004CB217808)National Natural Science Foundation of China (20471041, 90306014)+1 种基金Natural Science Foundation of Shanxi Province (20051018)Shanxi Research Fund for Returned Scholars (200428)
文摘The deoiled asphalt as the carbon source and the ferrocene as the metal source and the catalyst precursor were chosen to synthesize iron-containing carbon microparticles through co-carbonization at the temperature of about 450℃ for 3 h. The resulting products were treated at 2 000 ℃ for 2 h. All samples were examined by high resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD）. The results show that the iron particles in the heat-treated material are completely coated by carbon. In addition to the fully filled carbon microparticles as well as hollow carbon ones, also form carbon fibers with hollow centers. The formation mechanism of the as-prepared products was discussed briefly.
文摘During the Second world war, the Franco-British cooperation included the organization of purchasing missions for airnautical material in the States. On 25 november 1939, a Franco-British agreement was set up to organize two purchasing missions in the United States under the control of a ＂Liaison Committee＂ supervised by the Treasury Secretary, Henry Morgenthau. Edouard Daladier, French Chief of Government, sent Ren6 Pleven to establish contacts with General Arnold （AirCorps）. The Franco-British financial contribution facilitated a main spurt in investments which help modernize the American products apparatus. First contacts were established on April 1940, to be delivered in September. While France had not be able to benefit from significant part of these orders, Great Britain would take over some units that were originally allocated to France. These contracts would later facilitate the development of transatlantic cooperation.
