Materials Literature
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With the Schiff base of L-aspartic acid and salicylaldehyde as the ligands,the composite resin of chitosan/attapulgite(CS/ATP) produced by NaOH curing method as the carrier,the Schiff base metal complexes and the load-type Schiff base metal complexes of Co,Mn,Cu,Fe,Ni were synthesized.Their structural characterization…
A SiO2-TiO2 template with ordered tubular mesochannels has been prepared by the sol—gel method.Au nanorods are deposited in the tubular mesochannels of the SiO2—TiO2 template,and the shape of Au is changed from nanorods to nanospheres by ultraviolet irradiation during thermal deposition.The photocatalytic activity of…
Graphene oxide(GO)-filled poly(vinylidene fluoride)(PVDF) or polyacrylonitrile(PAN) microfiltration tubes were fabricated using decompression filtration. The microstructures of the GO nanosheets and GO-filled PVDF tubes were determined using X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and…
In this paper, three kinds of MgO with different specific surface area were prepared, and their effects on the catalytic performance of nickel catalysts for the carbon dioxide reforming of methane were investigated. The results showed that MgO support with the higher specific surface area led to the higher dispersion…
Various grain sizes of an Mg-4Y-3Nd-0.5Zr alloy were obtained by changing the cooling rate in a casting with wall thickness from 10 to 70 mm, and the effect of grain size on the microstructure and mechanical properties was investigated. When the cooling rate increased from 23.6 to 240.2 K min–1, the grain size of as-c…
NaYF 4 ∶ 20% Yb3 +,2%Er3 +crystal has been prepared via a simple hydrothermal route at different volume ratio of diglycol to water.X-ray diffraction( XRD),field emission-scanning electron microscopy( FE-SEM),transmission electron microscopy( TEM),and photoluminescence( PL) spectra were used to characterize and analysi…
We researched the electric heating property from butyl rubber-loaded boron carbide composite. The effects of boron carbide content on bulk resistivity, voltage-current characteristic, thermal conductivity and thermal stability of boron carbide / butyl rubber(IIR) polymer composite were introduced. The analysis results…
铽做了锶镧硼酸盐， Sr3La2 (BO3 ) 4:Tb (SLB ) ，被半实验的计算途径为 lanthanide (III )( 行(III )) 用 PM6 parametrization 和 SPARKLE 模型学习阳离子。兴趣的焦点在结构的方面上，例如房间参数和在象掺杂物集中的功能的各种各样的地点之间的掺杂物离子的分发。房间线性尺寸被计算与增加掺杂物线性地减少臼齿的集中。SLB 为掺杂物提供了二个地点。计算预言这些地点之一应该被 Tb (III ) 掺杂物比较喜欢。优化房间尺寸以及全部的精力专门在地点 1 或地点 2 与掺杂物为结构不同。计算预言对获得的试验性的结果被测试因为 SLB 由改变掺杂物集中的大音阶的第五音胶化…
颤动疲劳是压缩机片的主要失败模式。评估导致裂开的片的颤动压力为颤动疲劳的分析是很有用的。在这份报纸，由量的金属断面的显微镜观察的疲劳压力评价方法通过试验性的片和在职的第一阶段的压缩机片被学习以便评估在职的片的开始颤动压力。开始颤动应力的分析过程被建立。受到离心的力量的在职的片的颤动应力和弯曲颤动应力的评估结果同意飞行器的引擎测试结果。评估方法不能仅仅评估不同裂缝深度的相等的疲劳压力而且产出开始等价物疲劳压力，这被显示出。
A new kind of composite buffering material was made by filling the voids of honeycomb paperboard with polyurethane. Drop tests were performed to evaluate the dynamic energy absorption capacity of the material. Based on the tests results, we analyzed the mechanical behaviors of the material under different conditions a…
The catalysts with high activity and low toxicity for ring opening polymerization(ROP) of e-caprolactone had drawn much attention both in academia and industry. A series of asymmetric Schiff base aluminum complexes containing ligands that differed in their steric properties were synthesized. Their catalytic properties…
A novel aluminum alloy surface pretreatment process with fluoride-free and ammonium-free formula was developed. Through the two-step process of pretreatment etching-neutralizing, the aluminum alloy surface was smooth and had excellent sand finishing, the aluminum consumption was less than 2.0%. The sand finishing perf…
A method of using thermoelectric cooler as temperature control component was developed for the temperature control adjustment on an open-cathode proton exchange membrane fuel cell(PEMFC). A study on the temperature control was conducted to verify the feasibility of the method through analyzing the dynamic response cha…
The numerical modeling of grain drying is a topic of great relevance to post-harvest engineering. The required type of drying process depends on the quantity of grain to be dried and the required quality of the grain. The choice of the drying system depends on the operating parameters of the drying process.The granula…
Yb3+/Tm3+ co-doped and Yb3+/Ho3+/Tm3+ tri-doped tellurite glasses were synthesized by fusing the mixture of TeO2, PbF2, AlF3, BaF2, Yb2O3, Tm2O3 and Ho2O3 in a corundum crucible at 850 oC for 20 min. The synthesized glasses were characterized by upconversion emission spectra under the excitation of 980 nm laser, and t…
Perfluorinated alkyl silicone oil(PFASO) was successfully synthesized from N-ethyl-Nhydroxylethyl perfluorinated octane sulfonamide, succinic anhydride and amino silicone oil by esterification and amide reaction at moderate temperature in the presence of different catalysts. The chemical structure of the synthesized s…
cationic perylene diimide (PDI ) 和 anionic 自己组装胆固醇衍生物(CHOL ) 被静电的吸引力方便地完成并且叠相互作用，展出从几百纳米到微米尺寸的明确的超分子的 nanofibers。
声学的排放(AE ) 监视了张力的测试在受到不同的热处理的 35CrMnSiA 钢上被执行。结果显示出那熄灭并且划分(Q-P ) 热处理为商业 35CrMnSiA 钢提高了高力量和高韧性的联合机械性质，作为与象熄灭和 tempering (Q-T ) 和 austempering 那样的传统的热处理相比(在) 。有高振幅和高精力的 AE 信号在微观结构与保留的奥氏体(RA ) 在 35CrMnSiA 钢的张力的变丑期间被生产(经由 Q-P 并且在热处理获得了) 由于 austenite-to-martensite 阶段转变。而且，另外的 AE 信号不再出现，一旦 RA 为 Q-P 由 tempering 堕落了，机械性质将堕落到底…
Silver-based catalysts have been exten sively investigated as the platinum substituted catalysts due to their high catalytic efficiency,low cost and long-term durability.In this study,the surfactant-free silver nanoparticles supported on graphene quantum dots were synthesized through a facile approach without addition…
The effect of Zn addition on the composition of oxide films formed on 304 austenitic stainless steels was studied in high-temperature and high-pressured waters aiming to simulate the primary water of pressurized water reactor(PWR). After exposed in waters with 60 and 120 μg/kg Zn respectively at 320 ℃ for 600 h, the f…