Applied Mechanics and Materials Vols. 672-674

Abstract: Use TPEG and AA , Through free radical polymerization in normal temperature conditions, Synthesis of the high-performance polycarboxylate superplasticizer. The results showed that, Room temperature synthesis of polycarboxylate superplasticizer with high temperature (60°C) synthesis of polycarboxylate superplasticizer have same performance. The synthesis process without heating, Production water without deionized water, To save energy, To greatly reduce the cost.

Abstract: A laser rapid sintering (LRS) method has been developed for the synthesis of La_1-xSr_xGa_1-yMg_y-zM_zO_3−δ (M=Cr, Mn, Fe, Ni, Co), an excellent electrolyte for solid oxide fuel cells. It is shown that pure perovskite La_1-xSr_xGa_1-yMg_y-zM_zO_3−δ phase can be produced within a few seconds with this method under optimized synthetic conditions. The samples prepared by laser rapid sintering give rise to unique ridge-like or spear-like microstructures which are orderly arranged and densely packed. It is found that the La_0.9Sr_0.1Ga_0.8Mg_0.2O_3−δ and La_0.8Sr_0.2Ga_0.83Mg_0.085Co_0.085O_3−δ samples synthesized by LRS exhibit superior electrical properties to those samples for the same composition by solid state reaction (SSR) possibly due to their unique microstructure with relatively oriented and densely packed ridge-like or spear-like grains with large and regular sizes.

Abstract: Fe-based perovskite oxides SrFe_1-xSb_xO_3-δ (SFS, x = 0.05–0.15) have been prepared by a solid-state reaction and studied as novel cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). As SOFC cathodes, the highest electrical conductivity of 100 S cm⁻¹ at 425 oC in air was obtained for the x = 0.05 sample. The area-specific resistances of the SFS ( x = 0.05) cathode on the LSGM electrolyte where at 700 oC is 0.17 Ω cm². All these results demonstrates that Sb-substituted SFS perovskites materials are promising cheaper alternative cathodes for an IT-SOFC.

Abstract: Heavy oil in Liaohe oilfield is buried in more than 1000 meters, and the steam injection temperature is around 350°C. Through the experiment on surfactant product, high temperature foam surface active agent was developed, which was based on high carbon chain alkyl benzene sulfonate or alkyl toluene sulfonate, and auxiliary solvent and stabilizer were added. High temperature foam surface active agent can meet the needs of steam foam profile control technology.

Abstract: The author puts forward the core system design scheme of kilowatt aluminum-air battery on the basis of its chemistry characteristics and calculated function parameters of cell stack, and introduces the component functions, including control design, functional electrolyte circulation, air transport, DC / AC inverter system and other modules.

Abstract: Li₃V₂(PO₄)₃ cathode materials were synthesized by a sol-gel method. The effect of sintering temperature on the morphology and electrochemical performance of Li₃V₂(PO₄)₃ product was studied. XRD, SEM and galvanostatic charge/discharge tests were used to analysis the structure and electrochemical performance of Li₃V₂(PO₄)₃ materials. The results indicate that 800 °C was a suitable temperature to synthesize Li₃V₂(PO₄)₃ materials. The product synthesized at that temperature has more uniform particle and shows higher capacity than other materials.

Abstract: The geometrical structures and electronical properties, as well as hydrogen storage of Al-doped boron nitride nanotube have been investigated using first principles based on density functional theory. The results show that the symmetry of boron nitride nanotube is destroyed slightly by doping one Al atom. Furthermore, physical absorption is found due to the small average absorption energy of Al-BNNT-nH₂, which indicates that this hydrogen absorption will occurs at room temperature. In addition, some novel structures presenting almost same absorption behaviors are predicted, which will offer useful information to future experimental investigation on the design of hydrogen storage materials.

Abstract: Coal Water Slurry (CWS) gasification technology has a stable market due to its technical advantages. China did a lot of research and development work in coal slurry gasification technology, which has made considerable progress. Especially CWS gasification technology with Membrane Water Wall which was put into operation in recent years got a significant improvement in terms of safety, fuel flexibility, reliability and continuous operation cycles.

Abstract: The experiments on microscopic displacement of flowing gel flooding after water and polymer flooding were carried out with the sand-packing model. The experimental results of the microscopic displacement indicate that oil recovery can be further enhanced using flowing gel after water and polymer flooding, and the enhanced range is about 15 percent. Flowing gel flows preferentially through the largerchannels occupied previously by injected water in flowing gel injection process, improves sweep efficiency of injected water. Because of its viscoelastic, it can be stretched through the narrow pore deformation. The strength was reduced by the shear, dilution, and it would be driven out by the water from the pores and continue to move forward. Therefore, the main function of flowing gel is flooding, while profile modification is temporary effect. Flowing gel flooding can significantly reduce the cost of chemicals. From the development of tertiary oil recovery trend, flowing gel flooding is a technology that is being developed and perfected, with high technology-economic feasibility.

Abstract: This paper proposed a separated-frequency identification method of Li-ion battery model for Electric Vehicles (EVs). The main idea is to decompose the measured terminal voltage and current data in wavelet domain, and then the weighting least squares (LS) algorithm is used to extract the model parameters. Since the signal energy of open circuit voltage (OCV) mainly distributes in the low frequency band, the identifiable wavelet-domain battery model can be approximately obtained by neglecting the high frequency wavelet decomposition coefficients. Furthermore, based on the Akaike’s information criterion, we study the optimum decomposition order of the wavelet-domain battery model.