二次成核

实验结果表明：溶液的pH值可影响到氯酸钠晶体的手性分布。晶体手性分布的pH效应，可用随机动力学理论和胚晶凝聚二次成核理论来定性解释。

An experimental results indicated that the pH value in solution could influence the distribution of the crystal chirality of NaClO_3 . The effect of pH might be explained by stochastic kinetics and embryos coagulation secondary nucleation ( ECSN ) qualitatively .

实验结果表明微波辐照促进一次成核，抑制二次成核，是形成PbS纳米棒的关键。

The experimental results show that microwave irradiation helps the production of primary nuclei and suppress the secondary nucleation process , which is the key to form uniform PbS nanorods .

第Ⅲ阶段为二次成核阶段，载能粒子对基片表面的轰击是导致ZnO薄膜再次成核的重要原因。

The second nucleation of ZnO films may result from the bombardment of energetic ions or atoms on the surface of Si substrates .

并在研究APT晶体生长机理的基础上分析了大小晶粒线生长速率的差异，以及破碎、晶粒附聚和二次成核给结果带来的可能偏差。

The breakdown clustering of grains and second nucleation which may influence the results were also analyzed based on the understanding of the crystal growth mechanism of APT.

由于PCL与SAN是相容共混物，因此在用二次成核动力学方程描述PCL球晶生长速率时，我们引进了相互作用参数X。

The radial growth rates of the spherulites were described by the kinetic equation including the interaction parameter , because of miscible mixtures of PCL / SAN .

空气中，高温热处理高掺Ag量的白玻璃样品时发生二次成核，因此，Ag纳米颗粒尺寸呈双峰分布。Ag纳米颗粒尺寸的双峰分布导致其等离子体共振吸收峰出现双峰。

Bi-peak distributions of Ag nanoparticle sizes appear due to the twice nucleation during annealing of the high Ag-doped white glasses in air at a higher temperature , which induces surface plasma resonance bi-peaks .

悬浮状态下氯化钠晶体二次成核过程研究

Secondary Nucleation Process of Sodium Chloride Crystal in the Suspended Status

数值研究二次成核在喷雾冷却中的作用

Numerical study on the effect of secondary nucleation on spray cooling

采用矩量法确定了盐酸大观霉素溶析结晶二次成核和晶体生长动力学经验方程。

The empirical equations for secondary nucleation and crystal growth kinetics were determined by moment method .

新的设备结构设计，还充分考虑减少晶体二次成核几率；

New equipment design also fully considered how to reduce the probability of crystal secondary nucleation .

常规条件下的乙烯动力学为一光滑连续的曲线，在较低温度和较高压力下会有二次成核现象；

The kinetic curves of ethylene in gaseous condition are very smooth with second nucleation happened in lower temperature and higher pressure .

其机制是搅拌强度增大能显著提高α晶型的成核频率因子和二次成核速率。

The mechanism is that the kinetic coefficient and the nucleation rate of second nuclei of α increase relatively with an increase in stirring intensity .

从晶体生长动力学角度对晶须生长的过程进行分析，同时分析了二次成核的生长部位及方向。

Growth process of whisker was analyzed in terms of crystal growth kinetics . And the growth location and direction of secondary nucleation were researched . 3 .

动力学研究表明，在硝酸硫胺沉淀结晶过程中，初级成核是主要的成核方式，当晶浆密度较高且过饱和度很低时，二次成核不能忽视。

Primary nucleation was the main nucleation mode in the precipitation process . However , secondary nucleation cannot be ignored when the slurry density is high , and the supersaturation is low .

而且由于叶轮与流体作用产生的过强的剪切应力对生成的晶体产生碰撞，可能会产生过多的二次成核。

Another disadvantage is that the high shear stress and direct collision brought in by impellers are unfavorable to second-nucleation because of the collision between impellers and crystals by reason of too strong shear stress .

考察了乙烯水合物在乙二醇稀水溶液中的生成行为，发现乙二醇溶液中的水合物生成行为与在纯水中相似，但是出现二次成核现象要比纯水中频繁的多。

The ethylene hydrate formation kinetic behaviors in glycol aqueous solution were discussed . We discovered that the behavior curves in glycol aqueous solution were similar to that in pure water . But there were more frequent phenomenon of hydrate secondary nucleation in glycol aqueous solution .

研究了结晶添加剂对铝酸钠溶液加种分解过程二次成核、附聚的影响，并把这种添加剂应用于工业铝酸钠溶液中，探讨其对产品氢氧化铝粒度、产率的影响。

The influences of the crystallization additive on the secondary nucleation and agglomeration were studied in seed precipitation process of sodium aluminate solution . Then this additive was used in industry sodium aluminate solution and its effects on particle size and production rate of aluminum hydroxide were investigated .