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Li H.,Inner Mongolia University of Science and Technology | Zhang R.,Baotou Jing Rui New Material Co. | Liu H.,Baotou Jing Rui New Material Co. | Wang S.,Baotou Jing Rui New Material Co. | Hao X.,Baotou Jing Rui New Material Co.
Advanced Materials Research | Year: 2011

Ammonium hydrogen carbonate is taken as the precipitating agent to prepare Pr-N d carbonates from the raw material of Pr-Nd chloride solution. Pr-Nd oxides have been pre pared at different calcination temperature in the range of 800 °C-1500 °C. The oxides were c haracterized by XRD and XPS. Calcination temperature effects on the structure of Pr-Nd oxi des and the valence state of Pr in Pr-Nd oxides have been studied; Results showed that pra seodymium oxide full entered into the lattices of neodymium oxide. The crystal structure ch anged from cubic into hexagonal system with increasing calcination temperature.The valence of Pr in Pr-Nd binary oxides are Pr3+ and Pr4+. © (2011) Trans Tech Publications, Switzerland. Source


Zhao Y.-Z.,Inner Mongolia University of Science and Technology | Zhao Y.-Z.,Baotou Jing Rui New Material Co. | Hao X.-K.,Baotou Jing Rui New Material Co. | Zhang R.-X.,Baotou Jing Rui New Material Co. | And 3 more authors.
Chinese Rare Earths | Year: 2013

In this paper, the solubility of gadolinium in sodium carbonate and ammonium bicarbonate was studied. As a result, the solubility increased then decreased with reaction time. The solubility was improved by increasing carbonate concentration. With the increasing temperature, the solubility increased in sodium carbonate but decreased in ammonium bicarbonate solution. The solubility of gadolinium increased in anmmonium bicarbonate but decreased in sodium carbonate with addition of ammonium hydroxide. Source


Li H.,University of Science and Technology of China | Hao Z.,HIGH-TECH | Chen M.,University of Science and Technology of China | Chen M.,Baotou Jing Rui New Material Co. | And 2 more authors.
Advanced Materials Research | Year: 2013

Sm0.3Ce(0.7-x)MoxO(1.85+δ) yellow pigments were prepared by solid-state synthesis method, which were obtained by doping molybdenum for substitution of Ce4+ in Sm0.3Ce0.7O1.85. Effects of Molybdenum doping amount on crystal structure of the pigments were investigated and the coloring mechanism of the pigments was analyzed. The results show that molybdenum doping has markedly changed the color of the pigments. The color of pigments changed from cream to yellow as molybdenum doping amount increased from x=0.00 to x=0.04. And the color changed from yellow to yellow green when x was adjusted from x=0.05 to x=0.07. When x=0.08, the color of pigments changed to gray. © (2013) Trans Tech Publications, Switzerland. Source


Li P.-Z.,HIGH-TECH | Li P.-Z.,Baotou Huamei Rare earth Co. | Hao Z.-F.,HIGH-TECH | Wang S.-Z.,Baotou Research Institute of Rare Earths | And 7 more authors.
Chinese Rare Earths | Year: 2015

The saponifier were prepared by resuse of rare earths carbonate precipitation wastewater according to the concentration of sodium chloride and concentration of rare earth elements in the raffinate of the separation section. The results show that the fresh water was saved, the volume of evaporating and concentrating the precipitation wastewater was decreased, the concentration of sodium chloride in th saponification wastewater was increased, the energy consumption of recycing sodium chloride was decreased, the yield of rare earths was improved and the consumption of organic was decreased by resuing the precipitation wastewater. ©, 2015, Editorial Office of Chinese Rare Earths. All right reserved. Source


Wang J.,Inner Mongolia University of Science and Technology | Li X.-Y.,Inner Mongolia University of Science and Technology | Hao X.-K.,Baotou Research Institute of Rare Earths | Hao X.-K.,Baotou Jing Rui New Material Co. | And 4 more authors.
Chinese Rare Earths | Year: 2015

The extraction of Sm3+ and Zn2+ was studied by using 1.5 mol/L P507-kerosene as organic phase and the mixed solution of samarium chloride and zinc chloride as feed liqiuid. Effects of feed acidity, concentration of Zn2+, organic saponification degree, phase ratio and mixing time on separation of Sm3+ and Zn2+ were investigated. The optimal process parameters of the extraction separation of Sm3+ and Zn2+ were obtained. Organic saponification degree was 0.54 mol/L, the feed acidity was 0.15 mol/L, the phase ratio O/A was 3:1, and the mixing time was more than 4 minutes. The separation factor of Sm3+ and Zn2+βSm/Zn was 12. ©, 5015, Editorial Office of Chinese Rare Earths. All right reserved. Source

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