The single-crystalline Bi2Fe4O9 nanoparticles have been synthesized by hydrothermal synthesis.The shape of the samples is flake, and changes with the alkali concentration as confirmed by SEM.Furthermo
White light emitting diodes have attracted more attention due to their potential applications in extensive fields, such as device indicators, backlight, automobile headlights and general illumination.
采用液相还原法制备出了单分散性良好的Co磁性纳米颗粒.以Co(CH3COO)2为前驱体,油酸和三苯基膦为表面活性剂,制备出了粒径为8～10nm的Co纳米颗粒.室温磁性能测试表明,Co纳米粒子为超顺磁性.采用TGA对Co纳米粒子表面修饰,实现了在水相中均匀稳定分散.采用静电自组装(Layer-by-Layer, LBL)的方法,在石英基片上了得到了(Co/PEI)n(n=2,4,6,8,10)的自组
W-type barium ferrite (BaZn2Fe16O27)/Antimony-doped tin oxide (ATO) composite materials were synthesized by co-precipitation method, using BaZn2Fe16O27 prepared by traditional solid method and SnCl4·5
Nitride-doped ZnO bulk samples were prepared by solid-state reaction method.Structural, magnetic, and optical properties of ZnNxO1-x samples have been studied.The ZnO lattice parameters a and c increa
近期的研究发现内应力及颗粒尺寸对一级相变的滞后有较大的影响[1,2].本文研究了La0.sPr0.5Fe11.4Si中不同颗粒度对滞后的影响.如图1(a)所示,各种颗粒度的居里温度和块体一样,都在185K(居里温度由M(T)曲线的一阶导数的极小值温度确定).块体样品对应的热滞为1K左右,而颗粒度为100 μm以下的样品的热滞几乎完全消除.图1(b)所示为平均颗粒尺寸为4μm的样品的扫描电镜图片.图