...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Science >Preparation, microstructure and electrorheological property of nano-sized TiO2 particle materials doped with metal oxides
【24h】

Preparation, microstructure and electrorheological property of nano-sized TiO2 particle materials doped with metal oxides

机译：掺杂金属氧化物的纳米TiO2颗粒材料的制备，微观结构和电流变特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

New nano-sized TiO2 electrorheological (ER) materials doped with different metal (M = Na, Zr, Ce, Al, Ca, Zn) oxides have been prepared. Relationships between the composition, microstructure, conductivity, dielectric property and ER effect of these materials have been studied. The results show that doping Na2O, ZrO2, Al2O3 or CeO2 can enhance the ER performance of the TiO2 material, whereas, doping CaO or ZnO would decrease the ER activity of the material. The shear stress (sE) of the suspension (25 wt%) of Na-doped TiO2 in dimethyl silicone oil reaches 1.6 kPa at the electric field strength E = 4.2 kV/mm and shear rate c = 300 s(-1), and its tau(r) value of 54.6 (tau(r) = tau(E)/tau(0), where tau(0) is the shear stress at no electric field) is seven times higher than that of pure TiO2 suspension. This high tau(r) value is very advantageous to the use. The dielectric loss tangent (tan delta) plays a dominant role in influencing the ER performance of a particle material, and the effect of the surface area (pore volume, especially) and grain size should be taken into account.
机译：制备了掺杂有不同金属（M = Na，Zr，Ce，Al，Ca，Zn）氧化物的新型纳米TiO2电流变材料。研究了这些材料的组成，微观结构，电导率，介电性能和ER效应之间的关系。结果表明，掺杂Na2O，ZrO2，Al2O3或CeO2可以增强TiO2材料的ER性能，而掺杂CaO或ZnO会降低材料的ER活性。在电场强度E = 4.2 kV / mm和剪切速率c = 300 s（-1）下，Na掺杂的TiO2在二甲基硅油中的悬浮液（25 wt％）的剪切应力（sE）达到1.6 kPa。其tau（r）值为54.6（tau（r）= tau（E）/ tau（0），其中tau（0）是无电场时的切应力）比纯TiO2悬浮液的高7倍。高的tau（r）值对使用非常有利。介电损耗角正切（tanδ）在影响颗粒材料的ER性能中起主要作用，应考虑表面积（尤其是孔体积）和晶粒尺寸的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号