Preparation and Electrorheological Property of NaNO3-Doped Y2O3 Material

• Published in: Journal of rare earths Vol. 24; no. 1; pp. 39 - 43
• Main Author: 霍莉 马淑珍 商艳丽 贾云玲 许明远 李俊然 张少华
• Format: Journal Article
• Language: English
• Published: Department of Chemistry, Hebei Normal University, Shijiazhuang 050091, China%State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China%School of Vehicle and Transmission Engineering, Beijing Institute of Technology, Beijing 100081, China 01.02.2006; State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; Department of Chemistry, Baoding Teacher′s College, Baoding 071051, China%Department of Chemistry, Baoding Teacher′s College, Baoding 071051, China%State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
• Subjects: NaNO3; Y2O3; 显微结构; 电流变性能; NaNO3 doping; microstructure; electrorheological property; yttrium oxide; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(06)60062-8

A new class of electrorheological （ER） material using rare earth （RE = Y） oxide as the substrate, NaNO3- doped Y2O3 materials, were synthesized using Na2CO3 and Y（NO3）3 as starting materials. Their ER performance, dielectric property, and crystal structure were studied. The results show that doping NaNO3 can markedly enhance the ER activity of the Y2O3 material. For the suspensions of these materials in dimethyl silicone oil, a clear dependence of the shear stress on the doping degree of NANO3 was observed, and the optimal value of Na/Y molar ratio of 0.6 in doping degree was discovered, the relative viscosity ηr（ ηE/η0, E = 4.2 kV·mm^-1） of the suspensions is nine times higher than that of pure Y2O3 material. The new results of the relationship between ER effect and the microstructure were obtained, which are helpful for further understanding the mechanism of ER effect and synthesizing a good ER material.