Weidong XIANG
,
Zhongcai WANG
,
Quanzhu YANG and Wenxing ZHAO(Changchun Institute of Optics and Fine Mechanics
,
Chinese Academy of Sciences
,
Changchun 130022
,
China)Chengyu WANG(Institute of Glass and Inorganic Materials
,
Dalian Institute of Light Industry
材料科学技术（英文）
A transparent bulk sodium borosilicate gel with the composition of 72SiO2·23B2O3·5Na2O (wt pct) was prepared by using tetraethyl orthosilicate, boric acid, sodium methoxide, sodium alkoxide, sodium acetate as precursor, methanol, ethanol and glycolic methyl ether as precursor solvent and hydrochloric acid as catalyst. Properties of gel, varied principle and related mechanism of conversion for sol to gel are discussed. Ideal composition and dry process are given in this work
关键词:
S.A. Al-Aghbari and Z. W. Lu Ministry of Oil & Mineral Resources
,
Republic of Yemen Thermal-Engineering Department
,
Northeastern University
,
Shenyang 110006
,
China
金属学报(英文版)
A brief introduction to Arab countries, in respect of their locations, populations, areas and mineral resources, was given. The development of steel industry in Am6 countries in last two decades was staled as a whole. And the steel industries in Egypt, Qatar, Saudi Arabia, United Arch Emirates (UAE), Morocco, Libya, Joanal, Tunisia, Syria, Iraq, Algeria and Bahrain were analyzed separately. Some development problems faced by Arab steel industry, such as steel market, natural resources, manpower and finance, were pointed out.
关键词:
steel industry
,
null
,
null
Journal of Applied Physics
Household light bulbs were fabricated using macroscopically long and aligned single-walled carbon nanotube (SWNT) ropes as filaments. It was found that the SWNT filament could emit bright light when an electric current was passed through it. The light spectrum from the SWNT filament showed a nonblackbody characteristic of the thermal emission, and its infrared emission was almost completely suppressed possibly due to the "photonic band-gap" effect that originates in the loose fibrous bundle structure of the SWNT filament. The electrical resistance of the SWNT filament was found to first increase, and then continually decrease during light emission. It was also found that an electric current could cause degradation and burnout of the SWNT filament and result in complete amorphization, and that an interesting mushroomlike carbon structure was formed due to the carbon evaporation of the nanotube filament during light emission. (c) 2005 American Institute of Physics.
关键词:
transformation;mechanism
F.H. Froes(IMAP
,
University of Idaho
,
Moscow
,
ID 838443026
,
USA Manuscript received 26 August 1996)
金属学报(英文版)
The synthesis, processing and mechanical properties of the light metals, aluminum,magnesium and titanium Produced by advanced techniques are reviewed. Synthesis techniques to be addressed will include rapid solidification, spray deposition, mechanical alloying, plasma Processing and vapor deposition.
关键词:
:synthesis/processing
,
null
,
null
,
null
,
null
,
null
,
null
,
null
,
null
,
null
,
null
Journal of Applied Physics
We report the transparent cathodes comprised of a low work function rare earth element (RE) and a Au capping layer for top-emission organic light emitting diodes (TOLEDs). The Sm/Au, Yb/Au, Gd/Au, and Dy/Au cathodes possess a transmittance up to similar to 60% when the RE/Au thickness is 5/10 nm. The light extraction efficiencies for the TOLEDs with a silicon anode and a RE/Au cathode are computed to be 9%-13%, markedly higher than that for a similar device but with an Al/Au cathode. The surface plasmon polaritons at the Yb(or Sm)/Au cathode are found to be much weaker than those at the Al/Au cathode. (c) 2006 American Institute of Physics.
关键词:
interfacial chemistry;silicon anode;thin-films;devices;efficiency;microcavities;extraction;electrode;alq(3)
ZHANG Yunhua
,
GAN Fuxing
,
LI Meng
,
WANG Dihua
,
HUANG Zhongmai
,
GAO Yunpeng
钢铁研究学报(英文版)
Electrosorption technology was used to treat the reused comprehensive wastewater from iron and steel industry. A problem of relatively high conductivity of wastewater which greatly affects the reuse was examined, and industrial test was conducted for the reused water advanced deionization and purification in a comprehensive wastewater treatment plant of WISCO [Wuhan Iron and Steel (Group) Corporation]. The results of the onsite industrial test showed a satisfactory treatment performance for the reused water even at a flow rate of 1000 L/h in a standard 500 L/h unit. The average conductivity decreased by about 70%, from 580-780 μS/cm to 100-350 μS/cm. The average removal efficiency of Cl- and Ca2+ was about 75% and 68%, respectively, and CODCr of the treated water was also reduced in some degree while the pH value was almost unchanged. The energy consumption was as low as 06 kWh/t, which was remarkably superior to the conventional technologies. Therefore, it is entirely feasible that the novel electrosorption technology can be used in enhanced desalination and purification treatment of reused comprehensive wastewater in iron and steel industry.
关键词:
electrosorption
,
desalination
,
purification
,
conductivity
,
industrial reused water
Applied Physics Letters
We present our recent achievement of a transparent ceramic able to produce white light when directly combined with commercially available blue light emitting diodes. The photoluminescence properties of ceramic phosphor (Y1-xCex)(3)Al5O12 are studied as a function of doping fraction (x = 0.0005-0.0020). The emission color is tunable by variations of Ce3+ concentration and ceramic phosphor thickness. A maximum luminous efficacy exceeding 93 lm/W at a low correlated color temperature of similar to 4600 K is obtained, which is superior to samples made from commercial phosphor powders. Hence, the present transparent ceramic phosphor is expected to be an ideal candidate for generating white light. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4742896]
关键词:
optical-properties;luminescence;emission;color
Solid State Communications
Ultraviolet light emission with wavelength of 360-370 nm has been observed from porous silicon ( PS) samples properly oxidized at high temperature. The intensity rather than the peak location of ultraviolet light varies with anodization conditions and the oxidation temperature. Both thermal treatment in nitrogen and oxidation at 1150 degrees C can severely reduce the intensity of ultraviolet light, but the effect of the latter is stronger than that of the former. It is concluded that both the nanoscale silicon particles and the luminescence centers in Si oxide layers covering them play the key role in the ultraviolet light emission from PS.
关键词:
visible luminescence;photoluminescence;mechanism;si
Applied Physics Letters
BiFeO3 films prepared by pulsed laser deposition on Pt/TiO2/SiO2/Si substrates were studied as photoelectrode for water splitting. Under visible-light irradiation, the photocurrent intensity of the polycrystalline BiFeO3 film was found to double that of the amorphous one in a three-electrode cell. The incident photon to current conversion efficiency for the polycrystalline BiFeO3 electrode was approximately 16% at 350 nm and 7% at 530 nm at 1.5 V (versus saturated calomel electrode). The ferromagnetism of the amorphous BiFeO3 film was an order of magnitude weaker than that of the polycrystalline one, supporting the "size effect" explanation for magnetic origin. (C) 2007 American Institute of Physics.
关键词:
thin-films;water oxidation;electrodes;decomposition
