物质在非溶剂中的溶解度对纳米颗粒的制备存在影响,较低的溶解度有利于制备小粒度、弱团聚、颗粒球化度好的粉体材料;
The solubility of substance in non-solvent effect on the preparation, the lower solubility is helpful to obtain lower size, weak aggregation, spherical particles.
贺博士的团队针对不同的形状的纳米颗粒做了实验,发现一个简单的一步到位的方法:采用聚苯乙烯微球,先经氧气处理,然后再涂上硅石,便会形成树莓形状的颗粒。
Dr He's team experimented with different shapes and found a simple one-step method using polystyrene spheres treated with oxygen and then coated with silica to build raspberry-like shapes.
制得的颗粒多孔、速溶、真球度高、表面光泽度好、致密性强、不易破碎。
The prepared granule is porous and can solve quickly, with high sphericity coeficient, good surface luster, certain intensity and is not easy to break.
结果发现,球磨时间对混合粉末的结构及颗粒形貌存在显著影响。
The results show that the milling time has significant effect on the powder structure and particle configuration.
用示踪颗粒法对细玻璃球在斜槽中的低速流动进行了实验研究。
The flow of fine glass beads at low velocity in an inclined chute was investigated by means of tracer particles.
光球还有颗粒结构。
采用硬球模型描述颗粒间的碰撞作用。
The hard sphere model was used to describe inter-particle collisions.
这几种机理从不同的角度说明了高能球磨中,粉末颗粒之间相互作用时所发生的反应方式的复杂性。
At the same time, these mechanisms showed the complexity about powders interaction in the high energy ball-milling.
采用扫描电镜对球磨高炉矿渣粉体和立磨高炉矿渣粉体的颗粒形貌进行了观察。
Granule morphology of granulated blast furnace slag powders prepared with vertical mill (GBFS-V) and close circuit ball mill (GBFS-B) respectively were observed with SEM.
目的:研究托西酸舒他西林明胶微球颗粒的制备与质量控制。
OBJECTIVE to study the preparation of sultamicillin tosilate gelatin microspheres granules and its quality control.
生球落下强度大小体现了固体颗粒间联接桥抗剪作用的强弱。
The drop number reflects the shear resistance property of liquid bridge between solid particles.
结果表明机械球磨方法能有效地使木薯淀粉颗粒微细化。
The results showed that tapioca starch granules can be effectively micronized by ball milling.
模拟结果反映了颗粒间接触,烧结颈生长和气孔球化的微观过程。
The simulation results reflect the microscopic process such as grain contact, sintering neck growth and pore spheroidization.
结果表明:名义尺寸相同而实际尺寸相差较大的磨球所磨出的粉体粒度大且分布不均匀,烧结体硬质相颗粒粗大且等轴性差,抗弯强度和硬度均较低。
It is found that the grain size of the powders milled by balls with different diameters is big, the hard phase is big too and not uniform, the hardness and bending strength are also lower.
用扫描电镜和激光粒度分析仪研究了球磨和立式磨生产的矿渣微粉的颗粒形貌和颗粒群分布。
The appearances and particle size distribution of slag micro-powder produced by ball mill and vertical mill were researched with scanning electron microscope and laser particle size analyzer.
采用高能球磨法混料和低温快速热挤压工艺相结合,是实现增强体颗粒均匀分布的最有效方法。
The results indicate that high energy ball milling together with low temperature quick hot extrusion is the most effective method for obtaining homogenous distribution of reinforcers.
采用高能机械球磨法制备了金属铁、钨微粉,分析了铁、钨粉末产品的粒度分布特性、比表面积变化情况及颗粒形貌。
The powder of iron and tungsten are prepared by using high energy mechanical ball mill. The size distribution, specific surface area and grain shape of iron and tungsten powder are analysised.
悬浮液中的胶体球在一定条件下能够自组装成二维胶体晶体,以此为掩膜可合成纳米颗粒阵列体系,其颗粒形状、尺寸以及间距等参数易于控制。
In the nanoparticle array synthesized by taking the colloid crystal as the lithography mask, the shapes, sizes, spacing and even compositions of the particles can be controlled easily.
综述了无机粉末如石墨粉末、陶瓷粉末、铝粉、金刚石颗粒、空心玻璃微球等材料的化学镀镍研究及发展趋势。
Electroless nickel plating process and its study trends on inorganic powder such as graphite powder, ceramic powder, aluminum powder, diamond, hollow glass microsphere were reviewed.
但随着球磨时间的延长,颗粒粒径的减小速率会逐渐降低。
As the grinding time is prolonged, the rate of size reduction decreases gradually.
研究高能球磨法制备纳米钼铜复合粉末的主要影响因素,通过扫描电镜和透射电镜分析粉末的形貌及颗粒尺寸。
The main influence factors of preparing molybdenum copper nano-powder by high-energy ball milling were studied; the morphology and size of powders were analyzed.
在相同球料比和球磨时间下,粉体平均颗粒尺寸随球磨转速增加而减小,其中的小颗粒数目也增多。
When charge ratio and milling time were constant, the average particle size of the powder decreased with the increase of rotation speed, while the amount of small size particles increased.
研究了不同单体组成对微球的共聚组成、吸液性能和颗粒形态的影响。
The influence of monomer composition on copolymer composition, absorption characteristics and microsphere morphology was investigated.
采用双螺旋和球磨两种混料方式,研究不同混料时间对(铝)热剂性能及颗粒微现形态的影响。
Properties and morphology of thermites mixed up by twin-screw and ball milling procedures are investigated with different mixing time.
实验发现,在液相粘度较高、表面张力大,熔体材料不浸润固相颗粒和基板等因素的影响下,烧结过程中出现了球化现象。球化的出现妨碍了直接金属激光烧结成形的顺利进行。
During the laser sintering, due to the large liquid phase viscosity and surface tension, the balling effect occurred when the molten did not wet the solid metal particle and the underlying substrate.
目的:研究体外培养发育的人胚卵裂球18、X及Y染色体数目变异和培养方式对颗粒细胞分泌功能的影响。
Objective:To study the numerical deviation of chromosome of 18, X and Y in blastomeres developed in vitro and effects of culture system on granulosa cells secretory function.
示踪球的稳定速度和碎纸屑基本一样,可以认为这种颗粒能代表当地水流的运动速度。
It can be assumed that the speed is a good representation of the speed of the water at the spot.
示踪球的稳定速度和碎纸屑基本一样,可以认为这种颗粒能代表当地水流的运动速度。
It can be assumed that the speed is a good representation of the speed of the water at the spot.
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