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中国物理学会2011年秋季学术会议

作者： Yingwei Li Faxin Li Hairong Cai State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Institute of Acoustics Chinese Academy of Sciences Beijing 100080 China

In this work,we report some new experimental results on the deformation and fracture of PZT ferroelectric ceramics and BaTiO3 single *** explore the mechanism of crystal-symmetry deformation behavior of PZT ceramics,we fabricate tetragonal PZT (45/55),morphotropic PZT (52/48) and rhombohedral PZT (60/40),respectively,and determine the phase structures and lattice constants using powder XRD and Rietveld refinement.

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Effect of Template Concentration on the Crystallinity and Catalytic Performance of SAPO-34 Molecular Sieve（摘要）

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华东理工大学学报（自然科学版） 2011年第2期37卷 243-243页

作者： WANG Qian WANG Lei LI Zeng-xi MO You-bin WU Hui LI Guang-ming ZHANG Xiang-ping ZHANG Suo-jiang Graduate University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Multiphase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

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Wetting behavior and interfacial characteristic of Sn-Ag-Cu solder alloy on Cu substrate

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Chinese Science Bulletin 2010年第9期55卷 797-801页

作者： ZHANG XiaoRui YUAN ZhangFu ZHAO HongXin ZANG LiKun LI JianQiang Department of Energy&Resources Engineering College of EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Multiphase Complex System Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Wettability of molten Sn-Ag-Cu alloy on Cu substrate has been determined by sessile drop method, as well as its dependence on time and temperature. It was found that the evolution of contact angle at the alloy’s melting point experienced four different stages. Especially, the contact angle was unstable and fluctuant in stage II, and gradually decreased in stage III mainly due to a chemical reaction between Sn-Ag-Cu alloy and Cu substrate. The contact angle decreased with increasing temperature, but increased slightly at 629 K, for another chemical reaction occurred. Interfacial characteristic has been further investigated by examining the sample’s cross section. Intermetallic compounds of Cu6Sn5 and β-Sn phase were found at the interface of Sn-Ag-Cu/Cu.

关键词： contact angle lead-free solder sessile drop method Sn-Ag-Cu intermetallic compounds

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Effects of diluents on the ignition of premixed H2/air at micro-gravity conditions

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Kung Cheng Je Wu Li Hsueh Pao/Journal of engineering Thermophysics 2011年第SUPPL. 1期32卷 240-243页

作者： Zhang, Wei-Kuo Chen, Zheng Kong, Wen-Jun State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China

A computational study was performed to investigate the effects of diluents (He, Ar, or CO2) on the ignition of premixed H2/air mixtures. The objective of this study was to assess and explain the change of the minimum ignition energies (MIE) with the dilution ratio. It was found that, at the same dilution ratio, the MIE of He dilution was always higher than that of Ar dilution. The MIE of CO2 dilution was between those for He and Ar dilution at a low value of the dilution ratio, while it was higher than those for He and Ar dilution at a high value of the dilution ratio. The thermal and flame-dynamic effects of dilution were discussed to explain the change of the MIE with the dilution ratio.

关键词： Dilution

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Wetting between molten iron and prereduced ilmenite with carbon

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Transactions of Nonferrous Metals Society of China 2010年第5期20卷 924-929页

作者：王玉明袁章福赵宏欣熊绍锋姜伟忠李肇毅 Department of Energy and Resources Engineering College of EngineeringPeking University Institute of Ironmaking Research Baoshan Iron and Steel Co.Ltd State Key Laboratory of Multi-Phase Complex System Institute of Process EngineeringChinese Academy of Sciences

An interfacial study between molten iron and the prereduced ilmenite with carbon was conducted at different melting temperatures by the sessile droplet *** wetting characteristics between molten iron and the prereduced ilmenites with carbon were investigated by measuring contact angle of the droplet of molten iron on the prereduced ilmenite *** images of the interface were also examined by the optical microscope and SEM equipped with *** volume of molten iron increased with the melting temperature increasing when titania or high-content titania slag was used as the *** contact angle decreased with the melting temperature increasing and it was independent on time at constant *** contact angle was positively correlated with the reduction degree of the ilmenite,but the work of adhesion was negatively correlated with *** smelting temperature was beneficial to the separation of iron and Ti *** permeability of molten iron into the prereduced ilmenite with carbon was more obvious with reduction degree increasing owing to the high porosity of prereduced ilmenite.

关键词： molten iron prereduced ilmenite wetting interfacial permeability contact angle carbon reduction

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On a general theory for compressing process and aeroacoustics:linear analysis

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Acta Mechanica Sinica 2010年第3期26卷 355-364页

作者： E .Mao Y. P. Shi J. Z. Wu State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University 100871 Beijing China University of Tennessee Space Institute Tullahoma TN 37388 USA

Of the three mutually coupled fundamental processes （shearing, compressing, and thermal） in a general fluid motion, only the general formulation for the compress- ing process and a subprocess of it, the subject of aeroacous- tics, as well as their physical coupling with shearing and thermal processes, have so far not reached a consensus. This situation has caused difficulties for various in-depth complex multiprocess flow diagnosis, optimal configuration design, and flow/noise control. As the first step toward the desired formulation in fully nonlinear regime, this paper employs the operator factorization method to revisit the analytic linear theories of the fundamental processes and their decomposi- tion, especially the further splitting of compressing process into acoustic and entropy modes, developed in 1940s-1980s. The flow treated here is small disturbances of a compressible, viscous, and heat-conducting polytropic gas in an unbounded domain with arbitrary source of mass, external body force, and heat addition. Previous results are thereby revised and extended to a complete and unified theory. The theory pro- vides a necessary basis and valuable guidance for developing corresponding nonlinear theory by clarifying certain basic issues, such as the proper choice of characteristic variables of compressing process and the feature of their governing equations.

关键词： Longitudinal （compressing） processTransversal （shearing） process Acoustic mode Entropy mode Aeroacoustics

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Thermodynamic model of sulphide capacity in CaO-SiO2-MgO-Al2O3 ironmaking slags

Beijing Keji Daxue Xuebao/Journal of University of Science a...

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Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing 2011年第9期33卷 1079-1084页

作者： Zhang, Meng Guo, Han-Jie Ding, Ru-Cai Wang, Xiao-Dong Shi, Cheng-Bin Yang, Xue-Min School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China State Key Lab. of Multiphase Complex Systems Institute of Process Engineering Chinese Acad. of Sci. Beijing 100190 China Shougang Qinhuangdao Metal Material Co. Ltd. Qinhuangdao 066326 China

A prediction model of sulphide capacity in CaO-SiO2-MgO-Al2O3 slag systems was developed based on the ion and molecule coexistence theory (IMCT) of slags, i.e., IMCT-CS2- model. The predicted sulphide capacity by the IMCT-CS2- model was compared with the measured one from experiments and the predicted one by other five prediction models of sulphide capacity. The predicted sulphide capacity of CaO-SiO2-MgO-Al2O3 slags at 1 773 K by the developed IMCT-CS2- model has a higher accuracy than the measured one as well as the predicted one by other sulphide capacity models. The developed IMCT-CS2- model can calculate not only the total sulphide capacity of the slags but also the respective sulphide capacity of free CaO and MgO in the slags. Increasing the Al2O3 content from 10% to 17%, increasing the CaO content from 38% to 44% and decreasing the MgO content from 12% to 4% can improve the contribution ratio of free CaO from 97% to 99 % and decrease the contribution ratio of free MgO from 3% to about 1% to the total sulphide capacity of CaO-SiO2-MgO-Al2O3 slags.

关键词： Aluminum oxide

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Effect of acidic surface functional groups on Cr(Ⅵ) removal by activated carbon from aqueous solution

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Rare Metals 2010年第3期29卷 333-338页

作者： ZHOU Hualei CHEN Yunfa School of Applied Sciences University of Science and Technology Beijing Beijing 100083 China State Key Laboratory of Multi-phase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China

The activated carbon with high surface area was prepared by KOH *** was further modified by H2SO4 and HNO3 to introduce more surface functional *** pore structure of the activated carbons before and after modification was analyzed based on the nitrogen adsorption *** morphology of those activated carbons was characterized using scanning electronic microscopy （SEM）.The surface functional groups were determined by Fourier transform infrared spectroscopy （FTIR）.The quantity of those groups was measured by the Boehm titration ***（VI） removal by the activated carbons from aqueous solution was investigated at different pH *** results show that compared with H2SO4,HNO3 destructs the original pore of the activated carbon more seriously and induces more acidic surface functional groups on the activated *** pH value of the solution plays a key role in the Cr（VI） *** ability of reducing Cr（VI） to Cr（III） by the activated carbons is relative to the acidic surface functional *** higher pH values,the Cr（VI） removal ratio is improved by increasing the acidic surface functional groups of the activated *** lower pH values,however,the acidic surface functional groups almost have no effect on the Cr（VI） removal by the activated carbon from aqueous solution.

关键词： activated carbon surface functional groups removal modification chromium（VI）

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A Novel Method of Recycling CO_2 for Slag Splashing in Converter

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Journal of Iron and Steel Research International 2010年第12期17卷 11-16页

作者： ZHAO Hong-xin YUAN Zhang-fu WANG Wen jing PAN Yi-fang LI Shu-qing State Key I.aboratory of Multiphase and Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China College of Engineering Peking University Beijing 100871 China Graduate University Chinese Academy of Sciences Beijing 100049 China Tianjin Iron and Steel Group Co Ltd Tianjin 300301 China

Converter off-gas, an important energy resource for steel industries, is one of the weak points in the recov ery and utilization of secondary energy resources. To improve the level of recycling converter off-gas in steel plants, a novel approach to the recycle of CO2 separated from converter off-gas or other off-gas for the green slag splashing technique was developed, and the CO2 equilibrium conversion ratio of the green CO2 slag splashing under different technological conditions was calculated by the program of enthalpy （H）, entropy （S）, and heat capacity （C）, i.e. HSC software. Furthermore, the experiments of CO2 injected into molten converter slag were carried out, and the influencing factors of the green slag splashing technique using CO2 were analyzed. The experimental results showed that the carbon content for smooth slag splashing using COs was about 4.0%.

关键词： converter slag converter off-gas slag splashing CO2

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Crystallization behavior of zeolite beta from acid-leached metakaolin

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Petroleum Science 2010年第4期7卷 541-546页

作者： Li Qiang Zhang Ying Cao Zhijun Gao Wei Cui Lishan Department of Materials Science and Technology China University of Petroleum Beijing 102249 China National Key Laboratory of Multiphase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Microstructure Laboratory for Energy Materials China University of Petroleum Beijing 102249 China

Well-crystallized zeolite beta was synthesized by using acid-leached metakaolin as the silica-alumina source and tetraethylammonium hydroxide structure-directing *** influence of the composition of the reaction mixture on product crystallinity was investigated,and the crystallization process was studied by examining solid samples obtained at different synthesis *** showed that the acid-leached metakaolin was fully converted into soluble aluminum and silicon species,which is crucial for the formation of well-crystallized zeolite *** the beginning of the crystallization process,these soluble aluminum and silicon species formed a aluminum-rich intermediate structure with layer *** the crystallization proceeding,more silicon species were incorporated into the zeolite beta framework and the layered structure was changed into spherical particles of zeolite beta with high SiO 2 /Al 2 O 3 ratio and crystallinity.

关键词： Zeolite beta acid-leached metakaolin tetraethylammonium hydroxide （TEAOH） liquid phase transformation mechanism

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