C.Bouvy
,
B.L.Su
材料科学技术（英文）
Optoelectronic nanocomposites are a new class of materials, which exhibit very interesting and particular properties and attract a growing attention due to their potential applications in information storage and optoelectronic devices. Zinc oxide, ZnO, is one of the most interesting binary semiconductor (3.37 eV) with very important optical properties, which can be used in the fields such as short wavelength lasers, blue light emitting diodes, UV detectors, gas sensors, etc. This paper reviews the very recent progress in the preparation of silica-based ZnO nanocomposites. After an introduction reviewing the theoretical background, the article will begin with a survey of the optical properties and the quantum size effect (QSE) of ZnO/SiO2 nanocomposites prepared by the inclusion of ZnO nanoclusters inside silica mesoporous materials. The second part will focus on one of the most interesting properties of ZnO/SiO2 nanocomposites, which is the random lasing effect after one- and two-photon excitation. The final part will deal with the introduction of ZnO nanoparticles inside microporous zeolites and the observation of QSE. For comparison, the photoluminescence (PL) and QSE properties of ZnS nanoparticles occluded in mesoporous media are also described. New potential applications will be discussed since short-wavelength devices are required by industry to design, for instance, new information storage supports and biolabelling devices.
关键词:
ZnO nanoparticles
,
nanoparticles
,
microporous
,
and
,
mesopo
Z.Z. Yang
,
W. Tian
,
Q.R. Ma
,
null
,
null
,
null
,
null
,
null
,
null
,
null
,
null
金属学报(英文版)
Since the development of offshore oil and gas, the increased submarine oil and gas pipelines were installed. All the early steel pipes of submarine pipeline were depended on importing because of the strict requirements of comprehensive properties such as anti-corrosion, resistance to pressure and so on. In order to research and develop domestic steel pipe used for submarine pipeline, the Longitudinal-seam Submerged Arc Welded (LSAW) pipes were made of steel plates cut from the levelled steel rolls by both JCOE and UOE forming process. And the mechanical properties of the pipe base metal and weld metal were tested, the results were in accord with the corresponding pipe specification API SPEC 5L or DNV-OS-F101, which showed the domestic LSAW pipes could be used to the submarine oil and gas pipeline.
关键词:
Mechanical Properties
,
Properties
,
Offshore
,
oil
,
and
,
g
席振
,
高光明
,
马德成
,
罗晗
中国有色金属学报
Beroen位于厄瓜多尔西南大洋增生地体和原生大陆地体拼接缝合带的东侧.基于矿区围岩和主要硫化物的硫铅同位素特征进行分析.除磁黄铁矿外,其他硫化物平均δ34S为0.1％,来源于深部岩浆来源硫,并有结晶基底还原硫的贡献.围岩及硫化物的206Pb/204Pb为18.605～19.147,207Pb/204Pb为15.621～15.694,208Pb/204Pb为38.378～38.967,放射性成因的异常铅,经历3个阶段,中晚白垩纪前在地幔中为均质的非放射成因铅;始新世时期,富集地幔岩浆源形成,并在浅地壳同化吸收Chaucha和Macuchi基底岩石的放射性铅;在中新世矿床形成时,与浅地壳层岩浆房的热液系统有关的成矿流体淋滤围岩的放射成因铅,在矿石矿物中更加富集地壳铅成分.同时,Chaucha成矿区矿床的矿石矿物铅同位素组成比围岩和中安第斯矿床更富集放射成因铅,这与厄瓜多尔南部中晚第三世大量中小型体积侵入体侵位有密切关系.
关键词:
铅硫同位素
,
成矿物质来源
,
淋滤
,
吸收
,
Beroen金银矿
,
厄瓜多尔西南部
