Onion-like Fullerenes were produced at high-temperature in vacuum. The morphology of the carbon nano onion-like fullerenes was examined and characterized by high-resolution transmission electron microscopy (HRTEM). It...Onion-like Fullerenes were produced at high-temperature in vacuum. The morphology of the carbon nano onion-like fullerenes was examined and characterized by high-resolution transmission electron microscopy (HRTEM). It can be seen that the nano-sized, onion-like fullerenes possess high degree of graphization. The results suggested that the catalyst is the main factor affecting the size and yield of the fullerenes. The method is very promising for simple mass production.展开更多
为了探讨石墨涂层铀表面经真空热处理后对铀抗蚀性能的影响,通过增重法和电化学方法研究了处理样在100℃和150℃、含有一定量O2和H2O(g)气氛中的抗氧化腐蚀性和50μg/g C l-溶液中的抗化学介质腐蚀性。抗氧化腐蚀试验表明,当热处理时间(...为了探讨石墨涂层铀表面经真空热处理后对铀抗蚀性能的影响,通过增重法和电化学方法研究了处理样在100℃和150℃、含有一定量O2和H2O(g)气氛中的抗氧化腐蚀性和50μg/g C l-溶液中的抗化学介质腐蚀性。抗氧化腐蚀试验表明,当热处理时间(5 h)不变时,在600℃处理要优于在500℃处理。电化学试验表明,处理样品的抗蚀性能与热处理时间(2.5~10.0 h)和温度(500~650℃)有关,且在600℃处理5 h的样品的抗化学介质腐蚀性能最佳。真空热处理可以提高石墨涂层铀表面的抗蚀性能。展开更多
基金supported by National Natural Science Foundation(59871032,90306014)National Excellent Youth Foundation(50025103).
文摘Onion-like Fullerenes were produced at high-temperature in vacuum. The morphology of the carbon nano onion-like fullerenes was examined and characterized by high-resolution transmission electron microscopy (HRTEM). It can be seen that the nano-sized, onion-like fullerenes possess high degree of graphization. The results suggested that the catalyst is the main factor affecting the size and yield of the fullerenes. The method is very promising for simple mass production.
