【摘 要】
：
Fe2O3/Al2O3 nanocomposites prepared by using the sol-gel technique were reduced in H2 atmosphere at different temperatures, and the corresponding Fe/Al2O3 nanoc
【机 构】
：
Physical College,National Key Laboratory of Superhard Materials,Department of Materials Science and
【基金项目】
：
吉林省自然科学基金;吉林大学校科研和教改项目
论文部分内容阅读
Fe2O3/Al2O3 nanocomposites prepared by using the sol-gel technique were reduced in H2 atmosphere at different temperatures, and the corresponding Fe/Al2O3 nanocomposites were obtained after the reduction of Fe2O3/Al2O3 nanocomposites at 1173 K. The structures and properties of the specimens were studied by X-ray diffraction(XRD), M(o)ssbauer spectroscopy(MS), and vibrating sample magnetometry(VSM). The results show that the reduction temperature has a significant influence on the structure, the grain size, and the magnetic properties of the specimens.
其他文献
在以生物质气体为燃料的固体氧化物燃料电池体系中,通过热力学平衡分析编程计算出700～1200 K时气体中各物种例如H2、CO、CO2和CH4的平衡组成,从而得到以氧化钇稳定氧化锆(YSZ)
A neutral dinuclear compound Cu2[(O=PPh2)2N]2(μ-O2PPh2)2 has been unexpec- tedly prepared from the reaction of [Cu2(dppa)2(MeCN)4](ClO4)2 (dppa = bis(diphenylp
Ultrafast cyclic voltammetry was used to study the redox behavior of a gold electrode in acetonitrile. The direct electrochemical evidence of the dissociation a
The reaction mechanism of SiCl4 with H2 has been studied theoretically using Gaussian 98 program at B3LYP/6-311G* level. Three different reaction paths (a, b, c
古典方程一非，用 SaintVenant-Kirchhoff 材料做的线性地有弹性的飞机膜被福克斯， Raoult 和 Simo 和 Pantz (2000 )(1993 ) 认为正当。在压缩下面，联系最小化问题承认的 Weshow
The kinetics of the Fischer-Tropsch reaction over a Co/Nb2O5 catalyst in a fixed bed reactor was investigated experimentally. Experiments were carried out under
A novel 5-aminoisophthalate compound, [Mn(C8H5NO4)(H2O]n(2nH2O 1, has been synthesized by the hydrothermal assembly of 5-aminoisophthalic acid with manganese ac
We propose a scheme for generating the maximally entangled states of many superconducting quantum interference devices (SQUIDs) by using a quantized cavity fiel
The effects of waves on Surface Drag Coefficient (SDC) and surface mixing length were analyzed and discussed by carrying out three-dimensional current modeling
The Reproducing Kernel Particle Method (RKPM) is one of several new meshless numerical methods developed internationally in recent years. The ideal elasto-plast