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STUDY ON THE MORPHOLOGY OF POLYVINYL CHLORIDE/POLYSTYRENE BLENDS BY ELECTRON MICROPROBE ANALYSIS

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Chinese Journal of Polymer science 2000年第5期18卷 437-441页

作者： Zheng-ping Fang Gen-lin Wang Guo-ping Cai Cheng-wei Xu Jie Qian Institute of Polymer Composites, zhejiang university, hangzhou 310027, china college of chemical engineering, zhejiang university of technology, hangzhou 310014, china zhejiang Univ Inst Polymer Composites Hangzhou 310027 Peoples R China zhejiang Univ Technol Coll Chem Engn Hangzhou 310014 Peoples R China

The morphology of polyvinyl chloride/polystyrene (PVC/PS) blend samples with different mass ratios, prepared by means of solution casting and melt mixing, have been successfully examined by electron microprobe analysis (EMP). This experiment was performed in a scanning electron microscope attached to an energy dispersive X-ray analyzer. Differential scanning calorimetry was also used to investigate the phase separation of the blends. The results show that PVC and PS are incompatible and the blends have sea-islands phase structures. Blends prepared via melt mixing have finer phase-dispersion than those prepared via solution casting.

关键词： electron microprobe analysis polyvinyl chloride/polystyrene blends morphology

Corrosion of titanium in supercritical water oxidation environments

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中国有色金属学会会刊：英文版 2002年第6期12卷 1054-1057页

作者：卢建树毛志远张九渊college of chemical engineering zhejiang university of technology 马淳安college of chemical engineering zhejiang university of technology 毛信表college of chemical engineering zhejiang university of technology 李肖华college of chemical engineering zhejiang university of technology college of chemical engineering Zhejiang University of Technology college of materials and chemical engineering Zhejiang University

Supercritical water oxidation (SCWO) can effectively destroy many kinds of civilian and military wastes. The high temperature and high pressure SCWO operation conditions generate very corrosive environment that many engineering materials fail to withstand. Preliminary test shows that titanium may be a promising material in most of SCWO conditions. Commercially pure titanium is tested in four kinds of SCWO environments. Phenol, sodium dodecyl benzosulfonate, n amine phenol, and chlorpyrifos were chosen as typical target pollutants. The results show that titanium is only superficially attacked in the first three SCWO environments while in chlorpyrifos SCWO medium titanium is corroded. The corrosion is temperature dependent, with heavier corrosion occurring at near critical temperature. X ray diffraction analysis shows that the corrosion products consist of titanium oxy phosphates and titanium oxide, in which Ti 5O 4(PO 4) 4 is the main phase.

关键词：钛腐蚀超临界水氧化

Theoretical analysis of alloy multiplying factor by the empirical electron theory of solids and molecules

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science china(Technological sciences) 2007年第6期50卷 807-814页

作者： SONG YuePeng1,2, LIU GuoQuan2, LI ZhiLin3, FENG ChengMing1 1 Mechanical and Electronic engineering college, Shandong Agricultural university, Tai’an 271018, china 2 college of materials science and engineering, university of science and technology, Beijing 100083, china 3 college of Material science and engineering, Beijing university of chemical technology, Beijing 100029, china Mechanical Electronic engineering college Shandong Agricultural University Tai’an 271018 China college of materials science engineering University of Science technology Beijing 100083 China college of Material science engineering Beijing University of Chemical Technology Beijing 100029 China

By introducing the distribution probability of structural units in austenite contain- ing alloying elements and considering its effects on phase transformation, this paper establishes a calculation model of distribution probability of structural units. A new valence electron structure (VES) parameter-transformation effect coefficient of alloying elements (HL), is defined and then studied both theoretically and ex- perimentally. The relationship between the parameter HL and the multiplying factor (the quenching capability factor) of alloying elements is studied. The results indi- cate that the two parameters (HL and the quenching capability factor) have the same variation characteristic and substance feature. Therefore, the multiplying factor virtually expresses the relative quantity of structural units in the alloying elements-containing austenite.

关键词： multiplying factor (the quenching capability factor), empirical electron theory of solids and molecules, transformation effect coefficient of alloying elements, structural units in austenite containing alloying elements

Tetragonal Domain Switching via Reversible tm Phase Transformation

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Journal of materials science & technology 1996年第4期12卷 255-260页

作者： Haiyan ZHU and Zhicheng XU(Dept. of materials science and engineering, zhejiang university, hangzhou 310027, china) Dept. of materials science and engineering Zhejiang University Hangzhou 310027 China

Grinding-induced tm phase transformation and the resultant texture in ceria-yttria-doped tetragonal zirconia polycrystals with varied tetragonality have been studied by XRD. It is observed that the reversible tm phase transformation occurs during grinding and the intensity ratio of I(002)t/I(200)t increases with the transformability. The author proposes that the texture induced by grinding at low temperatures is due to the tetragonal variant reorientation via cyclic,reversible tm phase transformation, termed 'transformational domain switching', instead of the ferroelastic one

关键词： Jun Am Chen Tetragonal Domain Switching via Reversible t m Phase Transformation

Catalytic performance of Fe_3O_4-CoO/Al_2O_3 catalyst in ozonation of 2-(2,4-dichlorophenoxy) propionic acid,nitrobenzene and oxalic acid in water

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Journal of Environmental sciences 2010年第10期22卷 1623-1628页

作者： Shaoping Tong,Rui Shi,Hua Zhang,Chunan Ma college of chemical engineering and materials science,State Key Laboratory Breeding Base of Green Chemistry-Synthesis technology,zhejiang university of technology,hangzhou 310032,china [a] college of chemical engineering materials science State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of Technology Hangzhou 310032 China

Fe3O4-CoO/Al2O3 catalyst was prepared by incipient wetness impregnation using Fe（NO3）3.9H2O and Co（NO3）2.6H2O as the precursors, and its catalytic performance was investigated in ozonation of 2-（2,4-dichlorophenoxy）propionic acid （2,4-DP）, nitrobenzene and oxalic acid. The experimental results indicated that Fe3O4-CoO/Al2O3 catalyst enabled an interesting improvement of ozonation efficiency during the degradation of each organic pollutant, and the Fe3O4-CoO/Al2O3 catalytic ozonation system followed a radical-type mechanism. The kinetics of ozonation alone and Fe3O4-CoO/Al2O3 catalytic ozonation of three organic pollutants in aqueous solution were discussed under the mere consideration of direct ozone reaction and OH radical reaction to well investigate its performance. In the catalytic ozonation of 2,4-DP, the apparent reaction rate constants （k） were determined to be 1.456 × 10^-2 min-1 for ozonation alone and 4.740 × 10^-2 min^-1 for O3/Fe3O4-CoO/Al2O3. And O3/Fe3O4-CoO/Al2O3 had a larger Rot （6.614 × 10^-9） calculated by the relative method than O3 did （1.800 x 10-9）, showing O3/Fe3O4-CoO/Al2O3 generated more hydroxyl radical. Similar results were also obtained in the catalytic ozonation of nitrobenzene and oxalic acid. The above results demonstrated that the catalytic performance of Fe3O4-CoO/Al2O3 in ozonation of studied organic substance was universal to a certain degree.

关键词： catalytic ozonation Fe3O4-CoO/Al2O3 2,4-DP nitrobenzene oxalic acid kinetics

HYDRIDING INFLUENCE OF INDIUM ON Pd-In ALLOYS

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中国有色金属学会会刊：英文版 1996年第3期6卷 63-67页

作者： Chen Yanglin(Department of materials science and engineering, zhejiang university, hangzhou 310027) zhejiang UNIV DEPT MAT SCI & ENGNHANGZHOU 310027PEOPLES R CHINA

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关键词： hydriding valence electrons lattice dilatation Fermi energy

Effect of surfactants on the structure and photoelectric properties of ITO films by sol-gel method

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Rare Metals 2010年第2期29卷 143-148页

作者： LIU Jiaxiang, WU Da, ZHANG Nan, and WANG Yue college of materials science and engineering, Beijing university of chemical technology, Beijing 100029, china college of materials science and engineering Beijing University of Chemical Technology

The Indium tin oxide（ITO） thin film possesses excellent photoelectric properties that enable it to act as an ideal transparent *** obtain high-quality ITO films through sol-gel method, the ionic surfactant monoethanolamine and the non-ionic surfactant polyethylene glycol（PEG） were added to the ITO precursor *** influences of surfactants on the structural and photoelectric properties of ITO film samples were *** patterns indicated that surfactant monoethanolamine contributed to film predominant grain orientation along the（400） *** high transmittance（over 95%） was attributed to the preferred orientation and the grain size expansion of ITO *** showed that the surface particle size and the morphology of ITO films were strongly dependent on the kind of surfactants *** to the shortwave region, the absorption edge of the films exhibited the Burstein-Moss shift.

关键词： surfactants indium tin oxide films sol-gel structure photoelectricity

Solvothermal synthesis and ferromagnetic property of bamboo-shoot-like oriented carbon micromaterials

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Chinese science Bulletin 2010年第33期55卷 3838-3841页

作者： YANG YongZhen1,2,LIU XuGuang1,3,REN WenFang1,3,QIU Li1,3 & XU BingShe1,2 1Key Laboratory of Interface science and engineering in Advanced materials(Taiyuan university of technology),Ministry of Education,Taiyuan 030024,china 2college of materials science and engineering,Taiyuan university of technology,Taiyuan 030024,china 3college of Chemistry and chemical engineering,Taiyuan university of technology,Taiyuan 030024,china Key Laboratory of Interface science and engineering in Advanced materials (Taiyuan university of technology) Ministry of Education Taiyuan 030024 China college of materials science and engineering Taiyuan University of Technology Taiyuan 030024 China college of Chemistry and chemical engineering Taiyuan University of Technology Taiyuan 030024 China

Bamboo-shoot-like oriented carbon micromaterials(BOCMs)were synthesized by a solvothermal method at 450°C for 4 h using deoiled asphalt(DOA)as carbon source,toluene as solvent,ferrocene as catalyst precursor and amphiphilic triblock copolymer P123 as *** morphology and structure of the products were characterized by X-ray diffraction,field emission scanning electron microscopy,high resolution transmission electron microscopy and Fourier transform infrared *** results reveal that the obtained products have good distribution with uniform diameters of about 0.5 ?m and the lengths of 1-1.5 μm,and hydrogen-carbon bonds are observed on the surface of *** growth mechanism of BOCMs is discussed,in which that the catalysis of ferrocene and the dispersion and assembly of the aromatic molecules of DOA directed by P123 are critical to the formation of the *** coercivity value(231.91 Oe)from the measurement of a vibrating sample magnetometer shows that the BOCMs have an obvious ferromagnetic behavior.

关键词：溶剂热合成铁磁性碳源场发射扫描电子显微镜高分辨透射电子显微镜傅里叶变换红外光谱两亲嵌段共聚物振动样品磁强计

Preparation of TiC/Ni_3Al Composites by Upward Melt Infiltration

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Journal of materials science & technology 2000年第4期16卷 387-392页

作者： Yi PAN (Department of materials science and engineering, zhejiang university, hangzhou 310027, china) Kewei SUN (National engineering Research Center of Solid Waste Resources Recovery, Kunming university of science and technology,Kunming 650093, china) Department of materials science and engineering Zhejiang University Hangzhou 310027 China National engineering Research Center of Solid Waste Resources Recovery Kunming University of Science and Technology Kunming 650093 China

TiC/Ni_3Al composites have been prepared using upward infiltration method. The densification was performed by both Ni_3Al melt filling and TiC sintering during the infiltration. The dissolution of TiC in liquid Ni_3Al has been evidenced by finding Ni_3(Al,Ti)C after fast cooling in the TiC/Ni_3Al composites. The dissolution may be responsible for the infiltration and sintering. Compared with downward infiltration, the upward infiltration brought about higher strength and fracture toughness and shorter infiltration time. TiC/20 vol. pct Ni_3Al composite processed by upward infiltration had a flexural strength of 1476 MPa with a statistic Weibull modulus of 20.2 and a fracture toughness of 20.4 MPa . Better mechanical properties may be attributed to melt unidirectional movement in upward infiltration.

关键词： TiC Preparation of TiC/Ni3Al Composites by Upward Melt Infiltration Ni Al