Advanced Materials Research Vol. 842

Abstract: LiNi_0.5Mn_1.5O₄ is a promising 5 V class anode material for high power applications; however, before applying in lithium-ion batteries, it is necessary to find more appropriate electrolyte systems to exert the perfect electrochemical performance of LiNi_0.5Mn_1.5O₄. In this paper, the electrochemical performances of lithium difluoro (oxalato) borate (LiODFB)-sulfolane (SL)/dimethyl carbonate (DMC) electrolyte are investigated. It shows high oxidation potentials (>5.4 V) and satisfactory conductivities. When used in LiNi_0.5Mn_1.5O₄/Li cells, compared to the cell with the electrolyte system of LiPF₆-ethylene carbonate/DMC, LiODFB-SL/DMC electrolyte exhibits more stable cycle performance and higher discharge voltage plateau (>4.64 V).

Abstract: By using a surface treatment agent on the surface of calcium carbonate, discussed the variation of the specific surface area of the calcium carbonate during the grinding process, determined the added amount and added time of the dispersing agent, and researched on the grinding effect. According to the changes about the specific surface area of the grinding calcium carbonate particles, compared with the different effects that added the uniform dispersant and added the corresponding needs dispersant, had the particle size relationship followed the change of the specific surface area, reach to the purpose that refine the particle size and get a narrower particle size distribution.

Abstract: Bamboo culms as a structural building material have many advantages, are the ideal material for the future green building, and are increasingly brought to the attention of the industry. If it is widely recognized and adopted by structure and architecture, the complete bamboo culms performance parameters, testing methods, application of standards, and digital design and manufacturing methods are needed. Bamboo culms as a new type of building support, axial compression performance is directly related to the safety of the bamboo-framed buildings. This paper aims to study the structural properties of the bamboo culms compression test methods, and compression failure was simulated. Simulation results and experimental results are consistent. The model proposed in the work provides technical support for the structure of bamboo.

Abstract: The resin bond abrasive tool was prepared by hot pressing in this paper. The effects on the mechanical properties for three auxiliary materials were researched by changing the content of the auxiliary materials in the phenolic resin-based bond in this paper. The samples were tested by the abrasive tool sample's bending strength and Rockwell hardness. It shows that following by increasing the Cr₂O₃ content, the bending strength and hardness reduced, when the content was 5% and a substantial increase, and when the content was 5%, flexural strength of 9.28%, the hardness increased up 8.93%. When the content of NaHCO₃ is 16%, the hardness was reduced by 21.71%, the flexural strength fell by 35.61%. As the SiC powder content increases, the hardness of the abrasive will be a weak decrease, the bending strength decreased more, and when the SiC content of 7%, the hardness decreased by 11.11%, 31.25% of the bending strength decreased, while the grinding efficiency is also reduced.

Abstract: The mechanism that hydrated lime can improve water stability of asphalt mixture was analyzed through contrasting the performance of hydrated lime and ordinary limestone ore filler. The test results indicated that hydrated lime can obviously improve the water stability of asphalt mixture.

Abstract: The thermodynamic parameter and microstructure of three contents as-cast magnesium alloys were researched by phase picture, X-ray diffraction and thermodynamic analysis, whereafter prepared semisolid billets by strain induced melt activation (SIMA). The microstructure observation and rheology parameter analysis demonstrated that add zinc content consumedly reduced formation temperature of semisolid microstructure, decreased isothermal holding time, and accelerated microstructure evolution. With increasing zinc content, the semisolid morphology better and better that is propitious to semisolid process. The analysis verified that on the one hand, with increasing aluminum and zinc content the melting point of compound and the nucleation temperature of liquid phase decreased, and the nucleation quantity of liquid phase increased; on the other hand, with increasing alloy content the as-cast microstructure much finer, which to caused much more fine and spherical semisolid microstructure.

Abstract: In this study, the effect of pearlite microstructure on mechanical properties has been analyzed.The high carbon steel wire rods were treated by traditional salt-bath isothermal heat treatment and a new process, respectively. The microstructures and mechanical properties of the wire rods were tested with SEM and Instron 8501. The results shown that with the decrease of the isothermal holding temperature, the pearlite interlamellar spacing and pearlite colony size decreased and the mechanical properties of the wire rod increased. Especially the interlamellar spacing and pearlite colony size were decreased by new heat treatment observably. With the new treatment, the reductions of area increase.

Abstract: MFe₂O₄ (M=Mn, Co, Ni, Zn) Nanoparticles with diameters from 5nm to 30nm have been prepared through a hydrothermal method. In this system, ethanolamine was used as a basic source instead of NaOH. The as-prepared ferrites were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). In addition, the magnetic properties of the obtained ferrites have been studied at room temperature, showing that the magentic properties of ferrites closely depended on the chemical composition of M²⁺.

Abstract: Reactive extrusion as a green has been applied for cellulose/ Butyl Glycidyl Ether (BGE) in-situ chemical blend modification, process was conducted by using co-rotating twin-screw extruder through a reactive extrusion process in presence of IL (1-N-butyl-3-methylimidazolium chloride) which was acts as plasticizer and solvent. The blended materials (cellulose/BGE) were characterized by SEM, elemental analysis, FT-IR, XRD, and thermogravimetric analysis. The SEM showed a good compatibility between cellulose and BGE molecules. FTIR and X-ray diffraction are showed that the hydrogen bonds of cellulose was disturbed through the extrusion, and strong interactions occurred between cellulose molecules and BGE, which was an obvious effect on the thermal stability and the degree of crystallinity (decreased).