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Effects of dopants on magnetic properties of Cu-doped ZnO thin films

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Effects of dopants on magnetic properties of Cu-doped ZnO th...

2011中国材料研讨会

作者： H.L.Yang,X.G.Xu,S.Z.Wu,K.Wu,C.Ai,J.Miao,Y.Jiang State key laboratory for advanced Metals and materials,School of materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,china.

＜正＞Because neither metallic Cu nor Cu oxide is ferromagnetic and Cu2+is a potential magnetic ion with a total spin of1/2according to Hund’s rule,Cu is an ideal doping element

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IC-218合金的时效硬化或软化

上海金属 2001年第4期23卷 20-26页

作者：林一坚上海钢铁研究所市金属功能材料重点实验室 200940

IC 2 1 8合金在不同变形量冷轧后 ,表现出不同的退火行为。在 5 0 0℃以下退火时 ,6 0 %冷轧试样表现出时效硬化 ,而 2 0 %冷轧试样则呈现单调软化。结合热分析和X光衍射峰展宽量分析 ,发现这种硬化与软化与有序恢复进程相关。在 6 0 0... 详细信息

IC 2 1 8合金在不同变形量冷轧后 ,表现出不同的退火行为。在 5 0 0℃以下退火时 ,6 0 %冷轧试样表现出时效硬化 ,而 2 0 %冷轧试样则呈现单调软化。结合热分析和X光衍射峰展宽量分析 ,发现这种硬化与软化与有序恢复进程相关。在 6 0 0℃以上 ,两种变形试样都表现出回复软化 ,但在温度不太高时 ,6 0 %冷轧试样的回复程度远低于 2 0 %冷轧试样 ,随着温度进一步升高 ,两种试样的回复程度趋于相同。实验结果定性地支持Cahn关于有序合金时效硬化的半有序判据和相关的机理模型。

关键词： IC-218合金时效硬化回复退火软化有序化

Synthesis of Tributyl Citrate Using a Novel Solid Acid Catalyst Prepared by the Biomass Waste

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Synthesis of Tributyl Citrate Using a Novel Solid Acid Catal...

2011 IEEE International Conference on Waste Recycling,Ecology and Environment(ICWREE 2011)

作者： Yang LIAO1 2 Min PENG1 PeijieTONG1 Yan LI1 Shilin ZHAO1 2* 1 College of Chemistry and Material Science Sichuan Normal University Cheng du china 2 the Fund of key laboratory of advanced Functional materials of Sichuan Province Sichuan Normal University Cheng du china

Synthesis of tributyl citrate （TBC） has been studied by using a novel solid acid which was prepared by using collagen fiber as matrices. The surface morphology of the as-prepared catalyst was observed by scanning electron microscopy （SEM）, the structural properties of the SO42-/ZrO2 catalyst were determined by N2 adsorption/ desorption method, and the corresponding crystalline properties were carried out by X-ray diffraction （XRD）. The catalyst structure remained fibrous confirmed by SEM, and contained the typical mesoporous structure. The results indicated that a novel solid acid showed good catalytic and reusable performance. Under the optimum conditions, the conversion of citric acid was 96.5%. After easily separated from the products the catalyst could be reused 4 times, and the conversion of citric acid was not less than 92.0%. Therefore, the collagen fiber waste in leather manufacturing can be reused and an environment-protection approach to the synthesis of tributyl citrate can be provided.

关键词： tributyl citrate collagen fiber waste solid acid catalyst matrices

Ni-Al金属间化合物为基的微晶合金的制备与性能

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上海钢研 2001年第2期 1-7页

作者：林一坚上海市金属功能材料开发应用重点实验室

通过快速凝固和后继热处理制备出以Ni-Al金属间化合物为基(以Ni_3Al相为主,含少量NiAl相),用M_3B_2型颗粒增强和稳定的,具有均匀亚微米尺度的微晶合金。该微晶组织具有很高的稳定性,经过1000℃退火未发生粗化。微晶合金保持了主要基体相... 详细信息

通过快速凝固和后继热处理制备出以Ni-Al金属间化合物为基(以Ni_3Al相为主,含少量NiAl相),用M_3B_2型颗粒增强和稳定的,具有均匀亚微米尺度的微晶合金。该微晶组织具有很高的稳定性,经过1000℃退火未发生粗化。微晶合金保持了主要基体相Ni_3Al相高温强度高的特性,至少到650℃高温仍保持和室温相同的HV≈580高硬主。淬火态下Ni_3Al相有序程度较低,有利于韧性;退火中随着长程有序的恢复而韧性下降。亚微米尺寸的NiAl相的存在不会对韧性造成特别的危害。

关键词：金属间化合物微晶合金快速凝固制备性能 NiAl合金

Studies on Catalysis in Partial Oxidation of Methane to Syngas(Ⅰ)──Performance and Characterization of Ni-based Catalysts

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Chemical Research in Chinese Universities 1996年第1期12卷 70-80页

作者： CHEN Ping ZHANG Hong-bin LIN Guo-dong and TSAI Khi-rui (Department of Chemistry &. State key laboratory for Physical Chemistry of the Solid Surface, Xiamen University, Xiamen, 361005) XIAMEN UNIV DEPT CHEMXIAMEN 361005PEOPLES R CHINA XIAMEN UNIV STATE KEY LAB PHYS CHEM SOLID SURFACEXIAMEN 361005PEOPLES R CHINA

Highly active and selective Ni-based catalysts for partial oxidation of methane (POM) to syngas (CO/H,) have been studied and developed. Spectroscopic characterization by XRD, XPS, EPR, etc. demonstrated that under the POM reaction conditions, the Ni-components of the catalysts investigated were reduced and enriched on the surface to form metallic Ni0-phase. A comparative study of the first series of transition-metals showed that only Ni and Co have a high POM activity and selectivity, whereas the others (including Mn, Fe, Cu, etc. ) give mainly complete combustion products, Co, and H2O. The results favor the following viewpoints: the PoM activity is related with the rapidly changeable valence transitionmetal sites, M0/M2+ (e. g. Ni0/Ni2+ ), on the surface of the functioning catalysts;the transition-metal sites in zero-valence state seem to be responsible for the activation and dehydrogenation of methane by homolytic splitting of its C-H bonds on these sites. and the nature of rapidly changeable valence of the active sties is requisite for activation and rapid conversion of dioxygen.

关键词： Partial oxidation of methane Syngas Ni-based catalysts

Micromechanism of Crystallization in Multicomponent metallic Glass

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Journal of materials Science & Technology 1996年第6期12卷 401-408页

作者： Jianmin LP Mingxiu QUAN and Zbuangqi HU (National key Lab. of RSA, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, china)(To whom correspondence should be addressed) National key Lab. of RSA Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

A micromechanism in an atomic level of crystallization of transition metal-metalloid TM(80)M(20) metallic glass is thermodynamically proposed by taking Bernal polyhedra as the starting structure of metallic glass. It is composed of two competitively processes: (i) densification process of atom cluster leads to the formation of the precursor in amorphous matrix; (ii) the growth of atom cluster leads to the decreasing packing density. The preferential precipitation sequence of metastable phase is bcc, bet, cpc (close-packed crystal, hcp or fee structure). A metastable phase decomposition (Fe,Mo)(23)B-6 (fcc)-Fe2B highly strained bet phase was observed during crystallization of (Fe(0.99)M(0.01))(78)Si9B13 metallic glass, which is related to the occurrence of nanocrystalline.

关键词： Si Mo Rev Micromechanism of Crystallization in Multicomponent metallic Glass Nature

Terahertz photonic absorption bands observed in Micro/Nano-structured metallic/dielectric sphere arrays

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Terahertz photonic absorption bands observed in Micro/Nano-s...

第十六届全国光散射学术会议

作者： Guotao Duan~(1*),Fuhai Su~(1*),Wen Xu~1,Cunlin Zhang~2,Weiping Cai~1 (1 key laboratory of materials Physics,Institute of Solid State Physics.Chinese Academy of Sciences,Hefei 230031, china.2 Beijing key laboratory for Terahertz Spectroscopy and Imaging.key laboratory of Terahertz Optoelectronics, Ministry of Education.Department of Physics,Capital Normal University,Beijing 100048,china)

＜正＞In terahertz（THz） region,the metal-dielectric interfaces with the structure of the periodic pattern give rise to the formation of photonic bands of surface plasmons via the strong coupling between electricmagnetic waves and surface plasmons,and therefore provide the possibility to control and modulate the THz propagation,polarization,*** this work,we present the THz spectra of the periodic Au/dielectric sphere array films deposited on Si substrate,which reveal the sphere size induced metal-insulator transition and extraordinary *** studied Au sphere array films were processed

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Excitation of multiple plasmon resonances and local field enhancement in asymmetric double split ring arrays

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Excitation of multiple plasmon resonances and local field en...

第十五届全国光散射学术会议

作者： P.Ding,E.J.Liang~*,W.Q.Hu,G.W.Cai (School of Physical Science & Engineering and key laboratory of materials Physics of Ministry of Education of china, Zhengzhou University,Zhengzhou 450052,china)

＜正＞metallic nanostructures are a topic of considerable scientific and technological importance for their nanophotonic ***,symmetry broken systems have been drawn much attentions for their capability to alter the in...

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Nucleation in metallic Melt on the Ground and under Elevated Gravity

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Journal of materials Science & Technology 1994年第4期10卷 307-309页

作者： Kuiying CHEN Zhuangqi HU and Bingzhe DING (State key Lab of RSA, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110015, china)(To whom correspondence should be addressed) Inst of Metal Research Chinese Acad of Sciences Shenyang China

The expressions for nucleation rate in metallic melt on the ground and under elevated gravity have been derived theoretically and the effects of gravity and elevated gravity on nucleation rate have been discussed. A comparison of nucleation rate under microgravity with those on the ground and under elevated gravity has also been made

关键词： exp Nucleation in metallic Melt on the Ground and under Elevated Gravity