扩散控制

电流阶跃法和循环伏安法证明Cr（Ⅲ）还原是单步骤三电子的不可逆过程，反应受扩散控制，反应不存在前置反应，但有吸附的情况。

Chronopotentiometry and cyclic voltammetry indicated that Cr ( III ) / Cr is a one step irreversible process with diffusion controlled .

苯乙烯Ziegler-Natta聚合扩散控制动力学研究

Studies on the diffusion controlled kinetics of styrene Ziegler-Natta polymerization

Na和B元素在90℃条件下浸出属于离子扩散控制过程。

The leaching behaviors of Na and B element were controlled by ion-diffusion reactions under 90 ℃ .

高温时还发生碳纤维和CO2反应，受气体扩散控制，并分析了碳纤维的氧化机理，建立了氧化动力学模型。

The oxidation reaction mechanism was analyzed and oxidation reaction kinetic model was founded .

结果表明，纯Ni发生快速腐蚀，其腐蚀电化学阻抗谱呈典型的扩散控制反应的特征；

Experimental results indicated that pure nickel underwent fast corrosion , and its impedance spectra showed typical characteristics of a diffusion-controlled reaction .

Fe3O4烧结为表面扩散控制。

The Fe_3O_4 sintering proceeded via surface diffusion .

基于混沌加密和误差扩散控制的AVS压缩域视频水印

Chaotic encryption and error propagation control based video watermarking for AVS in compressed domain

动力学方程结果表明：YAG的烧结和晶粒生长动力学受晶界扩散控制。

The kinetic equation revealed that both the sintering mechanism and the grain growth of YAG ceramic were dominated by grain boundary diffusion .

山嵛酸Langmuir膜结合氨气扩散控制生长碱式硝酸锌的分形结构

Fractal Structure Formation of Zinc Hydroxide Nitrate under a Behenic Acid Langmuir Monolayer Combined with Ammonia Vapor Diffusion

SEM观察表明：晶内疲劳微裂纹纵剖面二维形态发生了主要由表面扩散控制的形态变化，由初始的扁椭圆形演化成多个球洞定向排列的形态；

SEM observations show that the two-dimensional longitudinal section of the intragranular microcracks evolves from the original thin-ellipse shape into the several aligned spherical voids dominated by surface diffusion .

Ti-Fe合金中温转变是以Fe原子扩散控制的切变型相变。

And that mid temperture transformation of Ti Fe alloy is shear transformation controlled by diffusion of Fe atom .

结果表明：在较高的阴极过电势条件下，Ni和Ni-SiC薄膜均遵循扩散控制下的3D瞬时成核/生长机制。

In the case of high deposition overpotential , the electroplating of Ni and Ni-SiC coating followed 3D nucleating and subsequent instantaneous grain growth mechanism .

研究表明甲醇在Pt-Ru／CNT／C电极上的反应过程复杂，但整个过程仍受扩散控制。

The methanol oxidation reaction at Pt-Ru / CNT / C electrode is still controlled by diffusion process though it is complexity .

扩散控制反应阶段：Si蒸汽经过N2气层扩散到Si3N4晶种表面与N2反应，反应受扩散控制，速度较慢。

Diffusion-controlled reaction stage : Si vapor diffuses through a layer of N_2 to the surfaces ofSi_3N_4 and reacts with N_2 , the reaction is diffusion-controlled and slows down obviously .

通过对葡萄糖氧化酶（GOD）的米氏常数Km值及衡量扩散控制作用的Y值的计算，从理论上说明了扩散限制膜的引入是提高葡萄糖传感器响应线性范围的一种有效方法。

By calculating the values of Km and Y , it was explained theoretically that the introduction of polyurethane diffusion limited membranes was an effective method for extending the linear range of glucose snesor .

四种吸附材料对Au（III）的吸附动力学研究表明吸附过程均为液膜扩散控制机理，较好的符合拟二级动力学方程。

The kinetic adsorption results showed that the adsorption process of four adsorption materials for Au ( III ) was controlled by the film diffusion and well followed pseudo-second-order rate model .

利用溶质扩散控制模型对TiAl合金定向凝固初始阶段变速过程中胞晶／枝晶转变进行了数值模拟。

Solute diffusion controlled solidification model was applied to simulate the initial stage cellular to dendrite transition of TiAl alloys during directional solidification at different velocities .

同时在单链聚集体的熔体结晶时也观察到密集海草型（CompactSeaweedCS）晶体形态，说明了晶体生长受扩散控制。

Meanwhile , the Compact Seaweed ( CS ) crystal was observed to coexist with sheaflike spherulites in the melt-crystallized single-chain samples , indicating a strong diffusion-controlled characteristic of crystal growth .

动力学计算表明，生石灰干式消化过程属于扩散控制，利用Carter方程基本上能够描述生石灰干式消化反应的机理过程。

Dynamics calculations show that the dry lime diffusion controlled the digestion process , lime carter equation could basically describe the reaction mechanism of dry digestion process .

在甲醇中，树脂对鞣酸的吸附符合Langmuir单分子层吸附模型，静态饱和吸附量为34mg/g，吸附为粒扩散控制过程。

The adsorption of tannin from methanol fits the Langmuir model , and the saturated adsorption capacity was 34mg / g resin . The adsorption was controlled by particle diffusion .

结果表明：改性-γAl2O3有机碳含量与吸附量呈正相关，吸附过程可能是灰层扩散控制。

The results show that the content of organic carbon in γ - Al_2O_3 is relative to the adsorption amount , and the adsorption process may be controlled by the ash layer diffusion step .

当贫溶质微区成分作为MS，其温度等于或高于等温淬火（或时效）温度时，贝氏体将以马氏体样切变形核，故贝氏体是在溶质原子扩散控制下切变形核。

It is proposed that when the M S temperature of the solute depleted regions is equal or higher than isothermal ( or aged ) temperature , the bainitic nucleation occurs within the solute depleted regions in the manner of martensitic shear .

Al-45%Ge亚共晶合金中初生（Al）相由柱状枝晶向等轴枝晶转变，其生长始终受溶质扩散控制。

The primary ( Al ) phase in Al-45 % Ge hypoeutectic undergoes a microstructural morphology transition from columnar dendrite to equiaxed dendrite with the increase of undercooling . The growth of the primary ( Al ) phase is always controlled by solute diffusion .

在膜内，气体渗透由Knudsen扩散控制，H2O与N2的分离因子分别为2.46和2.22。

The gases diffused through membranes are under the control of Knudsen diffusion and the separation factors of H 2O and N 2 in those membranes are 2.46 and 2.22 .

假定在高温下还原反应主要受扩散控制，基于此假设对还原过程进行了动力学实验，确定了还原学动力学模型，并拟合出速率常数K，为工业化生产提供了必要的基础理论数据。

Assume that reduction reaction at high temperatures controlled by diffusion , carry on dynamics experiment based on this assumption to the reduction process , determine the dynamic model , and fits speed constant K , provide the essential basic theory data for the industrialization production .

通过旋转圆盘电极（RDE）技术的流体动力学理论对实验数据处理，得出PQ的电化学反应机理是包括一个扩散控制的准可逆过程和一个两电子转移过程。

By the RDE technique and treatments of the experimental data , the electrochemical reaction mechanism of PQ involves a diffusion-controlled quasi-reversible process and a two-electron-transfer process . 2 .

结果显示.Cu（phen）2+2MP与6-MP无论在扩散控制过程或电化学控制过程都发生了相互作用。

The results show that the interaction of Cu ( phen ) 2 + 2 with 6-MP is proved to exist under diffusion control or electrochemistry control .

在硫酸铵介质中，金属锰与水的置换反应属扩散控制，反应的表观活化能为17.46kJ/mol；

The reaction was controlled by diffusion with apparent activation energy of 17.46kJ/mol .

制作了以纳米（20～30nm）YSZ粉体为原料的电解质基片、Pt电极上带有多孔涂层的扩散控制极限电流型氧传感器。

Oxygen sensor of limiting current type with a porous layer on platinum film electrode to limit the diffusion rate of oxygen was fabricated using the solid electrolyte of nanocrystalline ( 20 ~ 30nm ) YSZ based .

反应后期高转化率时，低温下反应受扩散控制影响，NCO和NH2反应的二级反应动力学速率常数逐渐变小，而高温下，逐渐升高；

At high conversion rate , the 2nd-order constants at lower temperature decreased with increasing reaction time due to the influence of diffusion control . However , they increased with increasing reaction time at higher temperature .