Preparation and Electrorheological Property of Y4O(OH)9(NO3)-NH4NO3 Materials

稀土学报(英文版), 2006, 24(2): 168-171.

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1.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

2.Department of Chemistry, Baoding Teacher′s College, Baoding 071051, China

3.State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;Department of Chemistry, Hebei Normal University, Shijiazhuang 050091, China

4.State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;Department of Chemistry, Hebei Normal University, Shijiazhuang 050091, China

5.Department of Chemistry, Baoding Teacher′s College, Baoding 071051, China

6.Department of Chemistry, Baoding Teacher′s College, Baoding 071051, China

7.State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

8.School of Vehicle and Transmission Engineering, Beijing Institute of Technology, Beijing 100081, China

基金项目: The National Key Project for Fundamental Research(G1998061305) 国家重点实验室基金(51457030103 JW0201) 中国科学院资助项目(20023005;29831010)

Preparation and Electrorheological Property of Y4O(OH)9(NO3)-NH4NO3 Materials

Keywords： electrorheological property

The new electrorheological (ER) material, a particle material composed of Y4O(OH)9(NO3) and NH4NO3, was obtained.They display better ER performance.The shear stress of the suspension of Y4O(OH)9(NO3)(NH4NO3)2.8 material in dimethyl silicone oil reaches 1469 Pa at an electric field strength (E) of 4.2 kV·mm-1 and the shear rate (γ) of 150 s-1.The relative shear stress, τE/τ0 (τE and τ0 are the shear stresses at E=4.2 and 0 kV·mm-1, respectively), is up to 29, which is 19 times that of pure Y2O3 material.The dielectric and conductive property of the materials play important roles in the modification of the ER effect of the particle materials.The researches on these new ER materials are very useful for obtaining a better understanding on the mechanism of the ER effect and finding an ideal ER material.

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Preparation and Electrorheological Property of Y4O(OH)9(NO3)-NH4NO3 Materials

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