共搜索到696条信息，每页显示10条信息，共70页。用时：0小时0分0秒542毫秒
Cyclic voltammetry studies on 4 V and 5 V plateaus of non-stoichiometric spinel Li1+xMn2-yO4 BAI Ying(白 莹)1, 2, WU Chuan(吴 川)1, 2, WU Feng(吴 锋)1, 2, WANG Guo-qing(王国庆)1, 2 1. School of Chemical... reaction. By X-ray diffraction analysis, Li2MnO3 was detected as a second phase with increasing the Li/Mn ratio; and the role of Li2MnO3 in Li1+xMn2-yO4 spinel was discussed. A slow scanning cyclic......
Spinel增强HAP·TCP复合生物材料研究 阮建明1,刘兵1 (1.中南大学粉末冶金国家重点实验室,长沙,410083) 摘要:采用化学共沉淀法制得羟基磷灰石(HAP)粉和铝镁尖晶石(Spinel)粉,并以HAP粉体和Spinel粉体为原料采用粉末冶金方法制得HAP·TCP-Spinel复合生物材料.采用红外光谱分析,X射线衍射,透射电镜,扫描电镜,金相,力学性能测试和蛋白质吸附实验等对上述合成的材料进行了表征.微观结构表明HAP·TCP与Spinel两相分布均匀,且界面结合良好.该复合材料具有良好的抗弯强度(σ抗弯)和抗压强度(σ抗压).当HAP的含量为62.5wt%时其抗弯强度和抗压强度分别达到σ抗弯=212MPa,σ抗压=352MPa.蛋白质吸附实验表明,HAP·TCP-Spinel复合生物材料对白蛋白和血清蛋白具有较强的吸附能力. 关键词:HAP·TCP-Spinel......
University of Science and Technology, Harbin 150040, China) Abstract:Mn-Zn spinel ferrites were synthesized by sol-gel method. Effects of calcined temperature on structure and particle size of MnZnFe2O4 were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD patterns indicate that the ultra fine Mn-Zn ferrite exhibits a spinel crystal structure. SEM images show......
In-situ Formation of Spinel Fibers in MgO-C Refractory Matrixes谢朝晖High Temperature Ceramics Institute,Zhengzhou University摘 要:In-situ magnesia-rich spinel fiber was formed resulting from the addition of ferrocene into MgO-C refractory matrixes. The formation of in-situ spinel fiber was detected to start at 1300 ℃. The amount, diameter and length......
Electronic structures of new tunnel barrier spinel MgAl2O4:first-principles calculationsZHANG Delin a , XU Xiaoguang a , WANG Wei b , ZHANG Xin a , YANG Hailing a , WU Yong a , MA Chuze a , and JIANG... for Materials Research, Tohoku University, Sendai 980-8577, Japan摘 要:The electronic structures of spinel MgAl 2 O 4 and MgOtunnel barrier materials were investigated......
Spinel增强HAP·TCP复合生物材料研究刘兵,阮建明,邹俭鹏摘 要:采用化学共沉淀法制得羟基磷灰石(Ca10(PO4)6(OH)2)粉体和铝镁尖晶石(MgAl2O4)粉体,并以羟基磷灰石(HAP)粉体和铝镁尖晶石(Spinel)粉体为原料采用粉末冶金方法制得HAP·TCP-Spinel复合生物材料;采用X射线衍射分析,金相分析,红外光谱分析,烧结收缩性能分析和力学性能测试等对制备的材料进行了表征.研究结果表明:HAP·TCP-Spinel复合生物材料的烧结收缩率约为45％;HAP·TCP与Spine两相分布均匀,且界面结合良好;该复合材料表现出优良的抗弯强度和抗压强度性能;羟基磷灰石的含量为62.5％时该复合材料性能达到最佳,其抗弯强度和抗压强度分别为189MPa和352MPa.关......
; First-principle investigation on stability of Co-doped spinel λ-Mn4-xCoxO8 HUANG Ke-long(黄可龙)1, CHEN Chun-an(陈春安)1, LIU Su-qin(刘素琴)1, LUO Qiong(罗 琼)1, LIU..., Zhuzhou 412007, China) Abstract: The mechanism of stability of Co-doped spinel λ-MnO2 that is referred to as spinel LixMn2O4 (x=0) was studied by using the first-principle......
Capacity fading of spinel LiMn2O4 during cycling at elevated temperatureYanbin Chen and Qingguo LiuLaboratory of Solid State Ionics, University of Science and Technology Beijing, Beijing 100083, China (Received 2001-09-20)摘 要:A normal spinel LiMn2O4 as cathode material for lithium-ion cells was cycled galvanostatically (0.2C) at 55℃. To determine......
Effect of annealing treatment on electrochemical property of LiNi0.5Mn1.5O4 spinel ZHANG Bao(张 宝), WANG Zhi-xing(王志兴), GUO Hua-jun(郭华军) School of Metallurgical Science and Engineering, Central... be indexed to cubic spinel structure. The mass loss occurring above 650 ℃ during the heating process can be mostly gained during the cooling process. LiNi0.5Mn1.5O4 synthesized with an annealing treatment......
; 文献标识码: A Compatibilities of electrolytes with spinel LiMn2O4 and LiCoO2 YIN Du... active materials spinel LiMn2O4 and LiCoO2 were studied. The structures and properties of the spinel LiMn2O4 and LiCoO2 prepared were detected by XRD. The oxidation potentials of the above electrolytes......
