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characteristics of sedimentation volume and accumulation density are obviously better than those of carbonate precipitation products. The carbonization method can be used not only to obtain ultra-fine rare earth... with special physical properties were prepared by carbon dioxide carbonization method. According to characterization of SEM, XRD, and TG-DSC, Ce(OH)3 prepared at pH = 7.5 exhibits smaller particle size than......
characteristics of sedimentation volume and accumulation density are obviously better than those of carbonate precipitation products. The carbonization method can be used not only to obtain ultra-fine rare earth... with special physical properties were prepared by carbon dioxide carbonization method. According to characterization of SEM, XRD, and TG-DSC, Ce(OH)3 prepared at pH = 7.5 exhibits smaller particle size than......
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Periodical attenuation of Al(OH)3 particles from seed precipitation inseeded sodium aluminate solution WU Yu-sheng(吴玉胜)1, ZHANG Di(张 迪)1, LI Ming-chun(李明春)1, BI Shi-wen(毕诗文)2, YANG Yi-hong... the decrease of the specific surface area of seeds, which is the major reason causing explosive attenuation of Al(OH)3 particles in seed precipitation process. Key words: Bayer process; sodium......
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Preparation of Al(OH)3 by ion membrane electrolysis and precipitation of sodium aluminate solution with seeds LI Yuan-gao(李元高)1, 2, CHEN Qi-yuan(陈启元)2, WANG Song-sen(王松森)2, YIN Zhou-lan(尹周澜)2...; Abstract: The preparation of Al(OH)3 by the ion exchange membrane electrolysis followed by the precipitation of sodium aluminate solution with seeds......
; temperature 40 ℃): 1 Washed precipitation seed; 2 Spent liquid-attached precipita- tion seed; 3 Seed dried at 110 ℃ for 2 h; 4 Seed baked at 550 ℃ for 15 min; 5 Washed carbonization seed When... [J]. Light Metals, 1995, 8: 12-14. (in Chinese) [10] WU Yu-sheng, BI Shi-wen, LI Wen-cheng, TONG Zhi-fang, YANG Yi-hong. Effect of carbonization seeds on precipitation of sodium aluminate solution......
Aging Precipitation Characterics of Lead Frame Cu-Cr-Zr-Mg Alloy LI He-jun1,KANG Bu-xi2,DONG Qi-ming2,LIU Ping2,SU Jua-hua2 (1.Northwestern Polytechnical University, Xi'an China;2.Henan University..., 73%IACS and 106HV, 76%IACS, respectively. Aging precipitation was dealt with by transmission electronic microscope (TEM). At 470℃ aging for 4h the fine precipitation of an ordered compound CrCu2(Zr, Mg......