氧化铝

Al (OC3H7)3 was added to an excess of distilled water (Al : H2O = 1:60-100 ) under vigorous stirring. Nitric acid [HNO3] was then added to peptize the hydroxide precipitate (Al: HNO3 = 1: 0.16). The reaction vessel was then closed and maintained for 48h at 90° C to get clear boehmite sol.

水解和缩聚反应的最终产物为非晶态的一水氢氧化铝，由许多 AlOOH 相互聚合交联形成的胶核处于中心位置，其外层是紧密吸附的同种离子 Al2O22+，它们共同构成了胶粒。

A series of Pd/α-Al2O3 catalysts for CO coupling reaction were prepared with α-Al2O3 made from different methods. The effect of pore-foaming agent and peptizer on the support and the effect of alumina pore structure on the dispersion and activity of catalysts were studied.

考察了不同制备方法得到的α-Al2O3载体对CO催化偶联制草酸二甲酯反应的影响，研究了致孔剂和胶溶剂对载体的影响以及氧化铝孔结构对催化剂分散度和活性的影响。

Alumina sols of different content were prepared by using Al3 as precusor, water as solvent, nitric acid as peptizer, ethylacetoacetate and polyvinylpyrrolidone as modified menstruum. We used dip-coating method and spin-coating method prepared of alumina films on the plane glass and used dip-coating method and rising liquid method inside the wall of the fiber.

以仲丁醇铝为前驱物、水为溶剂、硝酸为胶溶剂、同时加入乙酰乙酸乙酯和聚乙烯吡咯烷酮作为改性剂制备了不同浓度的氧化铝溶胶用提拉法和旋覆法在平板玻璃上镀膜，同时用提拉法和液面上升法在石英毛细管内壁上镀膜。

In order to investigate the catalytic performance to remove trace alkene from aromatic hydrocarbon, FTIR and XRD were used to analyze the character of catalysts with different contents of phosphotungstic acid and at different calcining temperature.

采用的催化剂以分子筛和磷钨酸为活性组分、氧化铝为载体，考察其脱除芳烃中微量烯烃的催化性能。

At present, the inorganic membrane whose main component is aluminum oxide is used widely in separate field. Though this membrane has high intensity, its some disadvantages: pockety aperture and different aperture which result from dissimilar technical conditions have a negative influence on its using range.

目前，国内外普遍应用的是氧化铝陶瓷无机膜，虽强度较好，但孔径分布较宽，且孔径因制备工艺不同差异较大，影响了无机膜使用范围。

The first year of this project studied the sintering behavior of sub-micron .theta.-alumina powders. After forming using cold isostatic pressing, green specimens were heat treated at various temperature and time. The pore size distribution, density, phase transformation, and microstructure were analyzed using mercury porosimeter, XRD, SEM.

中文摘要本计画第一年进行次微米之θ相氧化铝粉末的烧结行为研究，粉末以冷均压成型后以不同之温度及时间进行热处理，坯体/烧结体以水银孔隙仪、XRD及SEM等仪器，分析其孔隙分布、密度、相转换量、微结构等。

English:Activated alumina is a porous solid material with high dispersion and large specific surface area, which has fine adsorption capability, fine pressureproof performance, fine wear resistant performance and fine heat-resistant performance, and as a result it is widely used as adsorbents.

产品简介：活性氧化铝是一种具有多孔性高分散度的固体物料，有很大的比表面积，既有良好的吸附性能，又有良好的耐压、耐磨损和耐热性能，因而，被广泛地用作高效吸附剂、干燥剂本品为白色，球状多孔性物质无毒、无臭、不粉化、不溶于水。

Surface-treated aluminum hydroxide and magnesium hydroxide mixture, linear low density polyethylene and polyethylene grafted by maleic anhydride were melt-kneaded and extruded to produce a flame-retardant masterbatch, and then was extruded with polyamide 6(PA6) to yield PA6/SAMH/PE(50/30/20 by mass ratios)ternary composite.

采用表面处理过的氢氧化铝与氢氧化镁混合物（质量比2：1）、线型低密度聚乙烯、马来酸酐接枝聚乙烯共混挤出制成母料，然后与聚酰胺6(PA6)共混挤出即母料法制备了PA6/SAMH/PE三元复合材料。

Do you ever seem to see specks in front of your eyes?

起催化作用的是大量微小的铂颗粒分布在有许多微孔的氧化铝材料中。

The alumina bubble is a hollow spherulitic heat-insulating material,which is made by electro-melted method.

氧化铝空心球是由电熔法制得的空心球状隔热材料。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。