The minerals of the silt of the end of Sanxia reservoir of Yangtze River were studied. Through the spectral analysis of the samples, the analysis of chemistry components and the content mensuration of main minerals, c...The minerals of the silt of the end of Sanxia reservoir of Yangtze River were studied. Through the spectral analysis of the samples, the analysis of chemistry components and the content mensuration of main minerals, chemistry components and composition of the main minerals were tested. The results show that: (1) The silt of Sanxia of the Yangtze in Chongqing is mainly composed of silicolites and quartz, containing Fe and Ti in small quantity and Yt, Yb and Sc in minim quantity. The content of Yt, Yb and Sc is 25.8, 2.06, and 6.60 g·t -1 respectively. (2) Thereinto, the content of Sc is 101 g·t -1 in ilmenite and 121 g·t -1 in titanium-picrite. On the basis of these results, Sc leaching conditions and Sc leaching media are investigated by leaching media of HCl, H_2SO_4 and HNO_3. The results show that HCl can be used as the leaching media and its best leaching conditions are as follows: The leaching concentration is 2280%; the leaching ration on liquid-solid is 2∶1; the leaching temperature is 90 ℃; the leaching time is 10 h and the leaching granularity of the test sample is -0.040 mm. The best condition of HCl adding assiting solvent is that assisting solvent is No.7 and its dosage is 40 g·t -1, which leaching ratio is 81.31%.展开更多
The studies were made on the preparation processes of the rare earth metal and alloy target materials and their characterization. In this work the rare earth metals were prepared by electrolysis of the oxide in molten...The studies were made on the preparation processes of the rare earth metal and alloy target materials and their characterization. In this work the rare earth metals were prepared by electrolysis of the oxide in molten salt for Nd metal and metallothermic reduction of the fluorides for Gd, Tb, Dy metals. After vacuum refining and distillation purification these rare earth metals were used for manufacturing the element targets, mosaic targets and as the starting materials of preparing the rare earth-transition metal (RE-TM) alloy targets. The four kinds of Dy-FeCo, NdDy-FeCo, Tb-FeCo and GdTb-FeCo alloy targets with diameter of 100 mm and thickness of 3 mm were prepared using powder metallurgical technique. The oxygen content and microstructure of the prepared RE-TM cast alloys and sintered targets were analyzed. The features and requirements of the RE-TM alloy sputtering target materials were also discussed.展开更多
文摘The minerals of the silt of the end of Sanxia reservoir of Yangtze River were studied. Through the spectral analysis of the samples, the analysis of chemistry components and the content mensuration of main minerals, chemistry components and composition of the main minerals were tested. The results show that: (1) The silt of Sanxia of the Yangtze in Chongqing is mainly composed of silicolites and quartz, containing Fe and Ti in small quantity and Yt, Yb and Sc in minim quantity. The content of Yt, Yb and Sc is 25.8, 2.06, and 6.60 g·t -1 respectively. (2) Thereinto, the content of Sc is 101 g·t -1 in ilmenite and 121 g·t -1 in titanium-picrite. On the basis of these results, Sc leaching conditions and Sc leaching media are investigated by leaching media of HCl, H_2SO_4 and HNO_3. The results show that HCl can be used as the leaching media and its best leaching conditions are as follows: The leaching concentration is 2280%; the leaching ration on liquid-solid is 2∶1; the leaching temperature is 90 ℃; the leaching time is 10 h and the leaching granularity of the test sample is -0.040 mm. The best condition of HCl adding assiting solvent is that assisting solvent is No.7 and its dosage is 40 g·t -1, which leaching ratio is 81.31%.
基金Former the Ministry of Metallurgical Industry of China (BJ95-06-01)
文摘The studies were made on the preparation processes of the rare earth metal and alloy target materials and their characterization. In this work the rare earth metals were prepared by electrolysis of the oxide in molten salt for Nd metal and metallothermic reduction of the fluorides for Gd, Tb, Dy metals. After vacuum refining and distillation purification these rare earth metals were used for manufacturing the element targets, mosaic targets and as the starting materials of preparing the rare earth-transition metal (RE-TM) alloy targets. The four kinds of Dy-FeCo, NdDy-FeCo, Tb-FeCo and GdTb-FeCo alloy targets with diameter of 100 mm and thickness of 3 mm were prepared using powder metallurgical technique. The oxygen content and microstructure of the prepared RE-TM cast alloys and sintered targets were analyzed. The features and requirements of the RE-TM alloy sputtering target materials were also discussed.
