查询词典 AL

Aluminum Ispropoxide was hydrolyzed to prepare Al〓O〓 sol. The hydrolyzed 〓CHOH affected the sol peptization. The colloidal particle was the smallest when the peptization time was 12 hours.γ-Al〓O〓 membrane without cracks, thickness about 2μm, was prepared from 1M sol with a suitable amount of PVA solution. The mean pore size of the membrane was about 3nm. And, the H〓/N〓 separation factor was 3. 53, exhibiting good separation performance.

异丙醇铝为前驱体，水解制备Al〓O〓溶胶，水解产生的异丙醇影响溶胶的胶溶效果，并且胶溶12小时得到的胶粒最小。1M溶胶加PVA制备厚度2μm左右，无开裂γ-Al〓O〓膜，经600℃煅烧，平均孔径为3nm，H〓/N〓分离系数可达到3.53，表现了很好的分离性能。

By using the calculated results of EET theory, the local valence electron structure elements of residual chemical bonds of Al-Si and Mg-Al alloy melts, that is, the residual bond structure models, were established. From the viewpoint of effect of pressure on melt structure, the essential reason of deviation phenomenon for maximum solution point and eutectic point in thermodynamics equilibrium phase diagram was analysed. Moreover, under pressure condition, the change of thermodynamics equilibrium phase diagram was macroscopic reflection of microstructure change of alloy melt.

运用固体与分子经验电子理论的计算结果分别建立Al-Si、Mg-Al两种合金熔体的剩余化学键的局域价电子结构基本单元即残余键结构模型，从压力对熔体结构作用的层面，分析热力学平衡相图中最大固溶点和共晶点发生偏移的本质原因，并指出压力作用下热力学平衡相图的变化是合金熔体微观结构信息变化的宏观反映。

He stood up against al-Aswad al-^Ansiyy, an evil man who falsely claimed the status of prophethood.

他坚决的反对 al-Aswad al-^Ansiyy，该人是谎称具有圣品的坏人。

X-ray radiography, X-ray radioscopy and X-ray computed tomography were performed to the C preforms and C/SiC composites made by chemical vapor infiltration method. Elementary research of the simulation of X-ray nondestructive testing of C preforms and C/SiC composites was conducted. The main contents and conclusions are summarized as follows:(1) The equivalent absorption coefficients of graphite and SiC to Al (KAl/sic, KAI/C) were measured. It was found that in 35-45KV, KAl/sic=1.1~1.2 and KAl/c=0.08~0.12. That means X-ray radiography was much less sensitive to fiber defects than to SiC matrix. It was suggested that Al Image Quality Indicator would be used to evaluate the quality of X-ray radiographs of C/SiC.

本文选择X射线照相、X射线实时成像和X射线CT等三种方法对C纤维预制体及C／SiC复合材料进行了检测和研究，并对C／SiC复合材料X射线检测的计算机模拟做了初步的探索，主要研究内容和结果如下：(1)测定了C和SiC的X射线照相等效系数，在35～45KV的条件下，Al对SiC的等效系数K_为1.1～1.2，Al对C的等效系数K_为0.08～0.12，所以X照相射线检测C／SiC对C纤维缺陷不敏感，而对SiC基体缺陷敏感。

In order to investigate the influence of surface tension gradient driven convection on solidification behavior of alloys under microgravity, remelt and solidification of Al-Al〓Ni eutectic alloys, which have characteristics of directional growth along temperature gradient, were carried out on board Chinese retrievable satellite.

利用我国返回式科学实验卫星搭载的梯度炉和Al-Al〓Ni共晶合金定向生长的特点，研究了与重力无关的表面张力驱动对流（Marangoni对流）对合金凝固行为的影响，在空间微重力下获得了弯曲的双涡放射状共晶组织。

Remelt-dilution process for in-situ aluminum matrix composites Al2O3-Al3Ti/Al and Al2O3-TiC/Al produced by reactive sintering was investigated,and effect of the remelt temperature and the types of primary composites on the microstructure were discussed.

将反应烧结所获得的Al2O3－Al3Ti／Al和Al2O3－TiC／Al原位复合材料初坯进一步用于重熔稀释，获得了致密的、颗粒弥散分布且颗粒含量适中的铝基复合材料铸坯，并对影响该铸坯组织的因素进行了分析讨论。

He said in his book Ta'yad al-Haqiqat al-cAliyya, p. 57, Sufism in itself is the best and most honorable knowledge.

他在著作《Ta'yad al-Haqiqat al-cAliyya》的57页说：苏菲本身具有最好的，最值得尊敬的知识。

Little overdose aluminum caused that the displacement reaction occurred between Al and TiO2 with releasing much heat, and Al2O3 and free Ti were formed, then the active Ti combined with C and produced TiC; more overdose aluminum caused the thermit reaction happened between Al and TiO2, and was generated, then Al3 Ti combined with C and produced TiC.

首先在无过量铝的情况下，Al与TiO2发生置换反应，生成了Ai2O3和游离态，而后游离态与C结合生成TiC；而存在过量铝的情况下，首先发生铝热反应生成Al3Ti，进而Al3Ti与C结合生成TiC。最终完全获得Ai2O3-TiC/Al复合材料。

SiC/Al composites were prepared with pressureless infiltration method. Using pin on disk tribometer, the influence of volume fraction and particle size of SiC on dry friction and wear properties of the SiC/Al composites were investigated. The wear mechanism of the composites was studied with the analysis of the worn surface by SEM.

采用无压浸渗法制备不同碳化硅粒度和体积分数的SiC/Al复合材料，利用销－盘摩擦磨损试验机考察了碳化硅的粒度和体积分数等对SiC/Al复合材料干摩擦磨损性能的影响，采用扫描电子显微镜观察磨损表面形貌并分析其磨损机理。

Parabolic relation between the etching rate of AlGaAsSb materials and their Al content was found, unselective etching could be performed for GaSb and AlGaAsSb material with certain Al content.

实验中发现该腐蚀液对AlGaAsSb的腐蚀速率与其Al组份呈抛物线关系，在合适的Al组份下可对AlGaAsSb和GaSb两种材料进行非选择性的刻蚀。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。