赵晓鹏
智能材料与结构研究
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- 姓名:赵晓鹏
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学术头衔:
博士生导师
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学科领域:
材料科学基础学科
- 研究兴趣:智能材料与结构研究
赵晓鹏博士,男,46岁,西北工业大学教授、博士生导师、2000年国家杰出青年科学基金获得者、西北工业大学材料物理与化学国家重点学科智能材料的物理与化学特性学科方向学术带头人。1995年中国科学院金属研究所材料物理专业获博士学位,现任中国化学会、中国力学学会流变学委员会副主任、西北工业大学智能材料与结构中心主任、电流变技术研究所所长。1992年起从事智能材料与结构研究。建立了电流变技术实验室,包括材料化学制备实验室,具有溶胶-凝胶、乳液聚合、微乳液聚合等湿化学制备手段;材料物理制备实验室,包括超声、低温冷冻、微波、机械磨合等制备手段;流变性能检测实验室;介电和光谱微波性能检测实验室等,面积248平方米。在纳米无机氧化物如TiO2、BaTiO3、ZnO等、介孔材料制备、稀土改性、表面活性剂包覆和自组装合成技术等方面形成了特色。主持过国家自然科学基金6项及其它省部委基金10多项。先后主持国家自然科学基金重点项目“高性能电流变液制备研究”(1999年1月-2001年12月)和“十五” 计划国家863课题“复合型层状硅铝酸盐电流变液材料与自耦合器件研究”(2001年-2003年12月)。研制的稀土掺杂氧化物电流变液和纳米插层有机/无机改性电流变液材料性能居国际领先水平,首创了用电流变液和压电材料复合的自适应阻尼器。发表科研论文160余篇,其中SCI收录72篇,EI收录64篇。申请中国专利53项(发明专利44项),已获授权中国专利17项,另有33项通过初审已经公开。曾获陕西省科学技术奖、国家教委科技进步奖、中国航空工业科技进步奖、西安市科技进步奖等。培养博士生19人,硕士生31人。
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【期刊论文】Diffraction pattern and optical activity of complex fluids under external electric field
赵晓鹏, Q. Zhao, X. P. Zhao, a) C. Z. Qu, and L. Q. Xiang
Appl. Phys. Lett., Vol. 84, No.11, 15 March 2004,-0001,():
-1年11月30日
We have used laser diffraction methods to demonstrate that water-in-oil microemulsions and emulsions under an electric field present diffraction patterns and optical activity, which can be tuned by the external electric field. When the optical rotation angle increases with the electric field, the electric vector of incident polarized light rotates clockwise. It is thought that the spatial ymmetry breaking of the distribution of the droplets and the charges induced by the applied electric field is the origin of the phenomena in the complex fluids.
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【期刊论文】Preparation and Electrorheological Activity of Mesoporous Rare-Earth-Doped TiO2
赵晓鹏, Jian B. Yin and Xiao P. Zhao*
Chem. Mater. 2002, 14, 4633-4640,-0001,():
-1年11月30日
A new kind of mesoporous rare-earth-doped TiO2 particle with a well-defined crystalline framework was synthesized under a general temperature state for use as electrorheological (ER) active material. The neutral surfactant dodecylamine (DDA) was used as a template to direct the mesoporous structure. The low-angle X-ray diffraction peak showed that the mesoporous rare-earth-doped TiO2 had an interlayer distance of about 3.4 nm and the highangle peaks showed that the material possessed an anatase crystalline framework. ER properties of the suspension based on this material and silicone oil were measured in a dc electric field. It had been shown that the extraordinary high yield stress over 8.1 kPa could be induced when a 3 kV/mm electric field was applied. It was 20 times higher than that of pure TiO2 ER suspension and twice as high as that of single-doped TiO2 ER suspension as reported in our previous works. Interestingly, the shear stress of this suspension was found to continuously increase with temperature elevation in the range 10-100 ℃. These improvements were attributed to the pursuit of slow polarization and suitable conduction properties of this mesoporous-doped TiO2 suspension in terms of the measured results of dielectric and conduction properties. The present experimental result suggests that both the active internal structure and interface or surface structure of ER particles, which merit the pursuit of suitable dielectric and conduction properties, are the key to high ER activity.
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【期刊论文】Preparation and Electrorheological Characteristics of Rare-Earth-Doped TiO2 Suspensions
赵晓鹏, Xiao P. Zhao*, †, ‡ and Jian B. Yin†
Chem. Mater. 2002, 14, 2258-2263,-0001,():
-1年11月30日
According to the dielectric design, a new kind of rare-earth (RE)-doped TiO2 particle was synthesized by means of sol-gel technique for use in electrorheological (ER) fluids. A distinct enhancement in the yield stress under dc electric field was found by using such particles, when compared with that of pure TiO2. The yield stress of typical cerium-doped TiO2 suspension was about 5.0 kPa at 3 kV/mm and 7.0 kPa at 4 kV/mm, which were 10 times higher than that of a pure TiO2 suspension. The yield stress showed a marked dependence on RE-doping degree. Substitution of 10mol% cerium or 8mol% lanthanum for Ti could obtain the highest yield stress. These were well explained by the dielectric measurements that showed an increase in the dielectric loss and the dielectric constant at low frequency and their regular change with rare earth content. The lattice distortion and defects in the TiO2 crystal caused by substitution for Ti with large-radius RE ions may be responsible for the obvious improvement noted above.
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