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2014 Dianchi advanced materials Forum

作者： Chen, Wen Yi Guan, Jian Guo Materials Research and Testing Center Wuhan University of Technology Wuhan China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

ISBN: (纸本)9783038353348

Thermogravimetry (TG-DTA) method was used to study the heat resistance properties and the thermal decomposition kinetics of the aromatic amine-terminated polyurethane (ATPU)/Epoxy Resin System (E-44) which includes both flexible chains and rigid structural units. The results indicate that the decomposition temperature of the cured ATPU-2/E-44 is higher than that of the cured ATPU-1.5/E-44, and thermal decomposition residual of cured ATPU-2/E-44 is higher than that of cured ATPU-1.5/E-44 system. These results denote that the cured ATPU-2/E-44 has better heat resistance. The results of decomposition kinetics showed that the decomposition reaction activity of the ATPU-2/E-44 system is higher than that of ATPU-1.5/E-44. © (2014) Trans Tech Publications, Switzerland.

关键词： Polyurethanes

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Preparation and properties of YAG powder and porous ceramics

Preparation and properties of YAG powder and porous ceramics

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2014 Dianchi advanced materials Forum

作者： Zhao, Wen Bo Liang, Xin Hu, Fa Mei You, Liang Liang Ma, Bo Feng Wang, Ruo Lan Liu, Hong Ying Yang, Guo Sheng Tan, Bin Song, Jie Guang Wang, Fang Chen, Fei School of Mechanical and Materials Engineering Jiujiang University Jiujiang China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

ISBN: (纸本)9783038353348

Yttrium aluminum garnet (YAG) with a chemical composition of Y3Al5O12 is an important advanced structural and functional material. The preparation conditions were a pH of 9, a titration rate of lOml/minute and a reaction time of 60 minutes. The analysis shows that the YAG precursor does not have an obvious characteristic crystalline diffraction peak, the characteristic diffraction peak of YAG was found after the calcination of the YAG precursor at 1100°C for 1 hour, the characteristic diffraction peak of YAG is strong, which indicates that the YAG crystalline phase is integrated and pure. The pore microstructure of porous YAG ceramics marked differed with an increase in the sintering temperature, the compress strength of porous YAG ceramics is increased with an increase in the sintering temperature, the compress strength shows the opposite rule with the porosity, which indicates the mechanical properties of materials are effected with the densifìcation effect of materials. © (2014) Trans Tech Publications, Switzerland.

关键词： Yttrium aluminum garnet

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Effect of pH value on the properties of SnO2 nano-cystalline for dye sensitized solar cells 5

Effect of pH value on the properties of SnO2 nano-cystalline...

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5th Annual Meeting on Testing and Evaluation of Inorganic materials, TEIM 2014

作者： Song, Jieguang Hua, Lin Shen, Qiang Wang, Fang Zhang, Lianmeng Hubei Key Lab of Advanced Technology of Automotive Components School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Materials Engineering Jiujiang University Jiujiang Jiangxi332005 China

ISBN: (纸本)9783038353331

The study of dye-sensitized solar cells (DSCs) based on nano-crystalline films of high band gap semiconductors is a progressive field of research that is being carried out by scientists in a wide range of lab.ratories. To improve the conversion efficiency of the DSCs, the SnO2 nanorots photocurrent is prepared via the hydrothermal method, and characterized by XRD, FESEM, BET and Absorption spectrum. Though analysis the results, the conclusion is shown the pure SnO2 is preparation, the SnO2 nano-crystalline both shows the single phase that SnO2 from the sule solution to kalin solution. The prepared SnO2 nano-crystalline under pH=3 shows the particle-shape crystalline, the surface area of SnO2 nano-crystalline is 86.3412m2/g. The prepared SnO2 nano-crystalline under pH=7 shows the short rod-shape crystalline, the surface area of SnO2 nano-crystalline is 58.3408m2/g. The absorbance of SnO2 nano-crystalline shows the strong absorption in the ultraviolet ray range, the absorbance of synthesized SnO2 nano-crystalline under pH=11 shows the highest value. © (2015) Trans Tech Publications, Switzerland.

关键词： Dye-sensitized solar cells

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Graphene-based composite photocatalyst for solar fuel production

Graphene-based composite photocatalyst for solar fuel produc...

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中国化学会第29届学术年会

作者： Jiaguo Yu State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology

The production of solar fuels by solar energy conversion is considered to be one of major strategies for solving the global energy and environmental problems in the future. Photocatalytic water splitting for H2 production and CO2 reduction for methane formation have become important and promising methods for clean, economical, and renewal production of solar fuels by using solar light since Fujishima and Honda first reported the photoelectrochemical water splitting on a TiO2 electrode in 1972. Among various semiconductors, titania(TiO2) has attracted special attention because of its strong oxidizing and reduction power, cost effectiveness, lack of toxicity, and high photochemical corrosive resistance. Usually, the photocatalytic H2-production activity on TiO2 is significantly dependent on the type and amount of co-catalyst because bare TiO2 has poor photocatalytic H2-Production activity. It is well-known that the loading of Pt as a co-catalyst on TiO2 significantly enhances H2-production activity for photocatalytic water splitting in the presence of sacrificial reagents. However, Pt is a rare and expensive noble metal. Therefore, alternative co-catalysts based on non-precious metals and earth-abundant materials have been actively pursued. Graphene-based nanocpmposite photocatalysts have recently caused tremendous interest as a viable alternate to increase photocatalytic H2-production and CO2-reduction performance in converting solar energy into chemical energy. The use of graphene as cocatalyst and support to enhance the H2-production activity of photocatalysts has been confirmed due to its unique two-dimensional conjugated structure and electronic properties. In this talk, I will present our recent work on the design and fabrication of graphene-based nanocomposite photocatalytic materials for H2 production and CO2 reduction. The rational designs for high-performance photocatalytic materials using graphene-based materials are described. Our work also demonstrates gr

关键词： Graphene-based composite photocatalyst for solar fuel production

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Modeling of the droplet morphology evolution in polymer blends under shear by the pseudo-potential lattice boltzmann method 72

Modeling of the droplet morphology evolution in polymer blen...

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72nd Annual Technical Conference of the Society of Plastics Engineers: The Plastics Conference, ANTEC 2014

作者： Deng, Lin Huang, Zhigao Zhang, Yun Cui, Shubiao Zhou, Huamin Li, Dequn State Key Lab. of Material Processing and Die and Mould Technology Huazhong University of Science and Technology Wuhan China DGHUST Manufacturing Engineering Institute Dongguan China

ISBN: (纸本)9781634397087

In this work, a novel modeling strategy is proposed to simulate the morphology evolution of polymer blends by the inter-particle-potential lattice Boltzmann method. In this model, the binary components of the polymer blends are tracked by two sets of density distribution functions governed by lattice Boltzmann equation. The model is verified by computing the droplet behavior of deformation, breakup and coalescence under shear, and the results are found in good agreement with the theoretical and experimental observations. Copyright © (2014) by the Society of Plastics Engineers.

关键词： Distribution functions

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Effect of controlling concentration on the properties of SnO2 nanocystalline for dye sensitized solar cells

Effect of controlling concentration on the properties of SnO...

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2014 Dianchi advanced materials Forum

作者： Song, Jie Guang Hua, Lin Shen, Qiang Wang, Fang Zhang, Lian Meng Hubei Key Lab of Advanced Technology of Automotive Components School of Automotive Engineering Wuhan University of Technology Wuhan China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Department of Materials Engineering Jiujiang University JiujiangJiangxi China

ISBN: (纸本)9783038353348

The study of dye-sensitized solar cells (DSCs) based on nano-crystalline films of high band gap semiconductors is a progressive field of research that is being carried out by scientists in a wide range of lab.ratories. To improve the conversion efficiency of the DSCs, the SnO2 nanorots photocurrent, the effect of controlling concentration on the propertiesof SnO2 nano-crystalline were investigated via the hydrothermal method, and characterized by XRD, HRTEM, BET and Absorption spectrum. Though analysis the results, the conclusion is shown the pure SnO2 is preparation, the prepared SnO2 nano-crystalline under 0.05mol/L shows the particle-shape crystalline, the surface area of SnO2 nano-crystalline is 102.1683m2/g. The prepared SnO2 nano-crystalline under 1mol/L the fiber-shape crystalline, the surface area of SnO2nano-crystalline is 79.7591m2 /g. The absorbance of SnO2 nano-crystalline shows the strong absorption in the ultraviolet ray range, the absorbance of synthesized SnO2 nano-crystalline under the concentration of SnCl4solution for 1mol/L shows the higher value. © (2014) Trans Tech Publications, Switzerland.

关键词： Dye-sensitized solar cells

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Design and Production of Filament-Wound Composite Pressure Vessels

Design and Production of Filament-Wound Composite Pressure V...

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第十一届中日复合材料学术会议（CJJCC-11）

作者： Lei Zu Jihui Wang Shuxin Li State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

One of the most important issues for the design of filament-wound pressure vessels reflects on the determination of the most efficient meridian profiles and related fiber architectures. To better understand the design and production of filament-wound pressure vessels, in this paper we present an overview and comprehensive treatment for a variety of composite pressure vessels produced using filament winding. A generalized optimality criterion that is adapted to various optimal design problems for pressure vessels is elab.rated. A new possibility to improve the vessel performance can be offered by the application of adapted cross-sectional shapes instead of the conventional shapes. The isotensoid design, which leads to equal fiber tension throughout the whole vessel, is conducted to determine the netting-based optimal cross-sectional shapes. In addition, a simplified method for designing isotensoid pressure vessels with unequal polar opening is also outlined, with the aid of non-geodesic trajectories. The optimal design, based on orthotropic plate theory, is divided into two basic approaches: numerical and semi-analytical methods. A numerical optimization method is specially designed for determining the optimal meridian profiles of bellow-shaped pressure vessels. The semi-analytical design methods are presented for the determination of the optimal meridian profiles for continuum-based domes and toroids, respectively. The optimal cross sectional shapes lead to significantly improved structural performance of filament-wound products.

关键词： Composite pressure vessels Filament winding Fiber architecture Geodesic Non-geodesic

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Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO_2 to solar fuel

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Science China materials 2014年第1期57卷 70-100页

作者：李鑫温九青刘敬祥方岳平余家国 State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology College of Science South China Agricultural University Department of Physics Faculty of Science King Abdulaziz University

The shortage of fossil fuels and the disastrous pollution of the environment have led to an increasing interest in artificial photosynthesis. The photocatalytic conversion of CO2 into solar fuel is believed to be one of the best methods to overcome both the energy crisis and environmental problems. It is of significant importance to efficiently manage the surface reactions and the photo-generated charge carriers to maximize the activity and selectivity of semiconductor photocatalysts for photoconversion of CO2 and H2 O to solar fuel. To date, a variety of strategies have been developed to boost their photocatalytic activity and selectivity for CO2 photoreduction. Based on the analysis of limited factors in improving the photocatalytic efficiency and selectivity, this review attempts to summarize these strategies and their corresponding design principles, including increased visible-light excitation, promoted charge transfer and separation, enhanced adsorption and activation of CO2, accelerated CO2 reduction kinetics and suppressed undesirable reaction. Furthermore, we not only provide a summary of the recent progress in the rational design and fabrication of highly active and selective photocatalysts for the photoreduction of CO2, but also offer some fundamental insights into designing highly efficient photocatalysts for water splitting or pollutant degradation.

关键词： CO2 二氧化碳光催化剂 Ti

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Impedance analysis of Nb2O5 doped BaTiO3-Na0.5Bi0.5TiO3 ceramics

Impedance analysis of Nb2O5 doped BaTiO3-Na0.5Bi0.5TiO3 cera...

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IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Yue Sun Hanxing Liu Hua Hao Shujun Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Material Research Institute The Pennsylvania State University USA

BaTiO 3 -based MLCC materials were limited for high temperature applications (temperature range up to 200°C), due to their low Curie temperatures. The addition of Na 0.5 Bi 0.5 TiO 3 (NBT) component in BaTiO 3 (BT) based ceramics was found to increase the Curie temperature, without sacrificing the dielectric constant. The Curie temperature was reported to increase from 125°C to 156°C with addition up to 10mol%, making it possible to satisfy the X8R or X9R criterions. In addition, the small amount of Nb 2 O 5 dopant in the system leads to a diffused dielectric maxima and improved temperature stability. The NBT-BT with 2wt% Nb 2 O 5 addition was found to exhibit a core-shell structure, while maintaining the dielectric constant at about 2500. To analyze the electrical microstructure variation, the obtained impedance data was fitted by a 4RC equivalent circuit, corresponding to the core, shell, grain boundary, and ceramic/electrode interface regions. All the electrical properties, including the capacitance, activation energy, and conductivity could be well explained by using this equivalent circuit.

关键词： Niobium Ceramics Grain boundaries Dielectrics Impedance Temperature Conductivity

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Design and Production of Filament-Wound Composite Pressure Vessels

Design and Production of Filament-Wound Composite Pressure V...

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The 11th China-Japan joint conference on Composite materials(第十一届中日复合材料学术会议)

作者： Lei Zu Jihui Wang Shuxin Li State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi RoadWuhan 430070China

One of the most important issues for the design of filament-wound pressure vessels reflects on the determination of the most efficient meridian profiles and related iber architectures.

关键词： Composite pressure vessels Filament winding Fiber architecture Geodesic Non-geodesic

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