Study on Relationships Between Atomic Ratio of Hydrogen to Carbon, Aromaticity and Hydrocarbon Type Content in Heavy Oils 重质油中烃类族组成含量与氢碳原子比、芳香度之间关系的研究
The strong Pt surface sites of CO adsorption were completely covered by Ru atoms in the case of the bimetallic catalyst with atomic ratio of Pt to Ru of 1 ∶ 2. 当双金属PtRu催化剂Pt∶Ru原子比为1∶2时,催化剂Pt原子表面上的强CO吸附位(>112kJ·mol-1)被Ru原子所覆盖而完全消失。
The distributions of Co in TiO_2 anatase were determined by X-ray energy dispersive spectra microanalysis. The Co/ Ti atomic ratio is not as the stoichiometric ratio 0.07 but existing a compositional fluctuation throughout the film in nanometer scale. 通过X射线能谱分析得到了Ti093Co007O2薄膜中Co与Ti的成分分布,Co与Ti的原子比不严格地等同于薄膜的名义配比007,而是在纳米尺度上有成分起伏。
In this method, since atomic ratio of the elements studied is directly determined, accurate weighing and diluting of the sample are not necessary. 此法直接测出的是各被测元素的原子比,无须称量与准确稀释试样。
The influence of the impact energy of Ar as well as the assistance/ deposition atomic ratio ( Ar/ C), on the film structure was investigated. 改变Ar的入射能量和到达比(Ar/C),研究了它对DLC膜结构的影响。
XPS analysis suggests that the atomic ratio of Zn to Se on the epilayer is 1:1. XPS测量分析表明此单晶薄膜中Zn和Se的成分比为1:1。
Under the same sintering conditions, the steel bonded carbides with C/ Ti atomic ratio 0.9 have higher density and hardness, better refinement and distribution uniformity of TiC particles than those with C/ Ti atomic ratio 1.0. 在相同烧结条件下,C/Ti原子比为0.9的钢结硬质合金的密度和硬度比C/Ti原子比为1.0的钢结硬质合金高,所合成的TiC颗粒更细小,分布更均匀。
The atomic ratio of Si and N ranges from 1.1:1 to 1.4:1, indicating that the film is silicon-rich. 薄膜的硅氮比在1.1:1至1.4:1左右,薄膜富硅;
Rapid Non-Destructive Determination of Multi-Components Atomic Ratio in ( Medium-Thickness) Bubble-Domain Films by X-Ray Fluorescence Spectrometry 中厚磁泡薄膜多元组份原子比的X荧光光谱非破坏测定
Increasing Ca/ P ratio of the electrolyte can improve the Ca/ P atomic ratio in the films. 增大电解液钙/磷配比可提高膜中钙/磷原子比。
The XPS results showed that the maximum value of the N/ C atomic ratio in the films was 1 22, close to the stoichiometric value of C 3N 4, and carbon-nitrogen bond forms were mainly C-N and CN, as confirmed by FTIR spectroscopy. XPS分析表明,薄膜最高氮碳原子比N/C为122(接近C3N4中氮碳计量比),碳和氮主要以C&N、CN的形式成键。FTIR支持XPS的分析结果。
The model predicts that with increasing surface-to-volume atomic ratio, the melting temperature and melting entropy of free-standing nanocrystals will decrease while the above two parameters for the embedded nanocrystals will increase, and the conditions of supercooling and superheating of nanocrystals are discussed as well. 模型不仅预测了随表面原子百分数的增大自由表面纳米晶体熔点与熔化熵的减少及包覆纳米晶体熔点与熔化熵的增加,还对纳米晶体产生过冷和过热的条件进行了分析。
Al can improve the oxidation resistance, while the atomic ratio between Ti-and Nb, too high or too low, will reduce the oxidation resistance dramatically. Al提高合金的氧化抗力,而过高或过低的Ti和Nb的原子比都显著地降低合金的氧化抗力。
When Ag/ Sn atomic ratio is lower than 0.20, the main silver species is silver oxide existing in both dispersed state and crystal phase, and all the corresponding catalysts show relatively large surface areas and high catalytic activities. Ag/Sn原子比低于0.20的样品中,银物种为分散态氧化银及晶相氧化银,这些样品具有较高的比表面和催化活性;
The results show that C/ Ti atomic ratio has strong influence on the component, microstructure and hardness of TiC/ Fe composite coating. 结果表明,前驱体碳化复合技术制备的TiFeC系反应喷涂复合粉末中C/Ti原子比是影响涂层相组成、显微结构和硬度的关键因素。
Different atomic ratio La/ O film cathodes were prepared by pulsed laser deposition under various vacuum conditions. The emission properties were measured and their surface composition was investigated with in situ AES analyses. 利用脉冲激光沉积在不同真空度下制备了不同La/O的La-Mo薄膜阴极,测量其发射性能并进行了原位AES分析,讨论了氧在镧钼阴极热电子发射中的作用。
A measurement method of GaAs surface composition and Ga/ As atomic ratio was developed using X ray photoelectron spectroscopy ( XPS). A series of GaAs polished wafers and GaAs wafers treated with some chemical solutions were studied by XPS. 用X射线光电子能谱分析技术(XPS)研究了几种砷化镓抛光片及经不同表面处理方法处理的砷化镓晶片表面的化学计量比和表面化学组成。
By multivariate linear regression analysis method, the correlation of structural parameters was obtained from the basic property data ( H/ C atomic ratio, molecular weight, density) of residues and their fractions under ultra-critical condition. 利用减压渣油及其超临界流体萃取分馏馏分的基本性质数据(H/C原子比、分子量、密度),由多元线性回归分析法得到了结构参数的关联式。
The atomic ratio of Fe to Pt atoms was accurately controlled by DC co-sputtering. 利用直流共溅射方法精确控制Fe和Pt的原子比。
Many parameters have been achieved, such as fuel consumption, apparent atomic ratio of hydrogen to oxygen, fire front advance speed, air consumption, etc. the influence arising from the ratio of water injected to air injected upon combustion performance are also studied. 研究了湿式燃烧条件下的燃料消耗量、视氢碳原子比、燃烧前缘推进速度和空气需要量等参数,以及注水量与注空气的比值对火烧油层性能的影响。
The density of the ZrC layer changed with deposition temperature. The effects of the atomic ratio of carbon and zirconium and the flowrate ratio of hydrogen and argon in the coating gas on the characteristics and structure of ZrC coating layer were studied. 研究表明碳化锆镀层的密度随沉积温度而变化,反应气体中碳锆的原子数比值和氢氩流量比值影响碳化锆镀层性能和结构。
An Au-Si alloy ion source has been developed using the alloy with atomic ratio of69% Au and 31% Si. 采用原子比为Si(31%),Au(69%)的金硅合金,研制成了Au-Si共晶合金液态金属寓子源。
The Ca/ P atomic ratio and crystallinity of the film got higher with more fluorine. 随氟含量的增加,薄膜的Ca/P原子比和结晶度增加。
Pd and P atomic ratio in Pd-P/ C catalyst is 100:23, and the P0 content is about one third. 在获得的催化剂中Pd和P的原子比为100:23,有大约三分之一的P以Po的形式存在。
Evaluation of catalyst activity through a reaction system to adding the amount of rare earth, the best catalyst system reached its adding rare-earth Tb/ Zn atomic ratio of 0.06. 通过催化剂活性评价研究了反应体系中稀土添加量,得出催化剂体系的最佳稀土添加量为Tb/Zn原子比为0.06。
Their catalytic performances for low-temperature CO oxidation were preliminary discussed. The atomic ratio between Cu and Ti and calcination temperature were also investigated. 初步探讨了焙烧温度和铜钛不同原子比对催化氧化CO的活性影响。