Materials Literature
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Drop weight setup was used to experimentally study the impact behavior of four tubular T-joints.The effects of impact energy(E),length-diameter ratio(α=L/D) and diameter of chord on the dynamic failure modes were obtained.The global and local buckling characteristics of tubular T-joints under impact loading were disco…
Scale samples generated by different cathodic current densities were characterized by scanning electron microscope and the X-ray diffraction method to analyze their surface morphology and polymorph composition.The results show that the electrochemical treatment would greatly change the scale morphologies and crystalli…
The reactivitys of toluene degradation were investigated at room temperature under atmospheric pressure by using a non- thermal plasma reactor loaded with SiO2,Al2O3 and NiO/Al2O3. The different reactivities on these catalysts may originate from their dielectric constant,toluene adsorption and ozone decomposition abil…
In order to study the combined damage of fragments and shock wave on helicopter rotor,we analyzed the rotor structure and equivalent,calculated the damage of helicopter rotor from the combination of fragments and shock wave using given fragments velocity and CONWEP explosion model.The result of rotor damage was compar…
As a kind of reactive power compensation equipment,magnetically controlled reactors(MCRs),based static var compensator,can be directly put into operation in 1 000 kV voltage level with control flexibility and high reliability.For this reason MCR is widely concerned and researched.However,low responding speed has alway…
Considering the varying capacities of polymer foam stabilizer under different environments,the well-performed AOS is selected as the foaming agent to study the effects of partially hydrolyzed polyacrylamide( HPAM),carboxymethyl cellulose( CMC), xanthan gum( XC) and other polymers on the stability of the foam surfactan…
The basic principles of zone melting technology are explained,its latest development and application are reviewed focusing on the progress of its critical process steps.Description is made of the current applications of zone melting in high-pure materials like semiconductors,refractory metals and rare earth elements.C…
The feasibility of preparing sodium borohydride by electrolyzing sodium metaborate has been demonstrated from the thermodynamic perspective and the cyclic voltammetry curves of different electrode materials were investigated. Furthermore, under the condition of copper as a working electrode, the changing relations bet…
SOFC (solid oxide fuel cell) is a very promising technology that achieves high power generation efficiency, while being very nearly usable. It is high time we considered enhancing commercialization and dissemination of SOFC by setting a standard for the evaluation method of SOFC cell/stack performance. In setting the…
The electrical conductivity of acceptor doped La 2 WO 6 and Nd 1.2 Lu 0.8 WO 6 has been characterized as a function of temperature and atmospheric composition. In this work we report proton thermodynamics and transport parameters of nominal La 1.96 Sr 0.04 WO 6-δ . The material displays exothermic hydration, with hydr…
4-ビニル安息香酸メチルあるいはアクリル酸メチルとスチレンとの共重合体をヒドラジンと加熱することで，ヒドラジドを側鎖に有するポリマーへと誘導した．この共重合体をoxoneあるいはジアセトキシヨードベンゼンで酸化することによって架橋させた．架橋体は次亜塩素酸ナトリウムによって酸化的に脱架橋され，カルボン酸をもつポリマーを与えた．このポリマーをメチルエステル化することで，元のポリマーを再生した．このサイクルは再び繰返すことができた．
Star-shaped cationic polyacrylamide was synthesized using free-radical polymerization of acrylamide and acryloxyethyltrimethyl ammonium chloride (DAC). The co-polymerization of acrylamide and acryloxyethyltrimethyl ammonium chloride was conducted using pentaerythritol as a core and ammonium persulfate and sodium sulfi…
Polyfluorinated polymers have unique properties arise from the carbon-fluorine bonds which have small polarizability and strong bond energy. They exhibit the excellent chemical stability and the electrical characteristics (low-dielectric constant, low volume resistivity, low-dielectric loss and good electrical insulat…
水合肼以其碱性及吸附性受到越来越多的关注, 同时它在粘土中的污染问题也越来越受到重视. 本工作构建了高岭石团簇模型为Al6Si6O42H42并在B3LYP/6-31G(d,p), MP2/6-31G(d,p)//B3LYP/6-31G(d,p)和MP2/6-31++G(d,p)// B3LYP/6-31G(d,p)水平下对一水合肼以及二水合肼在高岭石层间的插层性质(如: 优化构型、结构参数、结合能、电荷分布、振动光谱、静电势等)进行探究. 计算表明, 当一水合肼进入层间后, 水分子和肼分子之间的相互作用发生了改变. 即水与肼分子分别以氢键的形式插层于高岭石层间, 且肼与高岭石之间的相互作用要强于肼与水之间的相互作用, 同时插层位点…
林琳 a 陈超 a 柴瑜超 b 何丹农 a,b ( a 纳米技术及应用国家工程研究中心 上海 200241) ( b 上海交通大学材料科学与工程学院 上海 200240) 摘要 通过调控酸碱浓度, 在水热条件下得到了金红石、锐钛矿、板钛矿、钛酸钠等一系列 TiO 2 /钛酸盐产物.对上述 TiO 2 、酸洗处理后的钛酸盐等一系列不同晶型、不同形貌的样品进行焙烧处理, 系统性地研究焙烧温度的逐渐升高对 产物晶型转变和形貌演化的规律性影响.给出了水热酸碱浓度以及焙烧温度两个因素与
Adsorption and desorption characteristics of gradient distributed Bragg reflector (DBR) porous silicon (PSi) were investigated under the exposure of organic vapors. Gradient DBR PSi whose average pore size decreased as the lateral distance from the Pt electrode increased was generated by using an asymmetric etching co…
A novel poly[(alkylamino)borazine] (PPAB) precursor to boron nitride (BN) was synthesized and the effect of synthesis temperature (Tsyn) on its composition and properties was investigated. The results showed that with elevation of temperature, the precursor turned from a colorless transparent liquid to a yellow foamed…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Ashutosh Mishra, Niyati Mishra; Effect of doping on structural and dielectric properties of BaTiO…
This article introduces a new type of mass production technology for CIS absorber formation yielding highest average module efficiencies. Key feature is a novel custom designed mass production furnace exploiting the principle of forced convection during heating, the CIS formation reaction and cooling. In the applied t…
The manganite LSMO films were successfully grown on glass substrates without any additional buffer layer by pulsed laser deposition. The films have been investigated by X-ray diffraction (XRD), field emission-scanning electron microscope (FE-SEM), electrical and magnetic measurements. From the XRD pattern the film is…