查询词典 boehmite

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。

Thixotropy of peptized concentrated aqueous pseudo-boehmite suspensions of SD and TY was performed with different methods including hysteresis loop and steady shear measurements.

采用经典的滞后环方法和恒剪切速率方法分别考察了山东工业拟薄水铝石和实验室自制拟薄水铝石胶溶所形成的浓水溶性悬浮体系的触变性。

The measurement of acid dispersion index indicates that the pseudo-boehmite powder canbe peptized completely. When n_H+/n_AlOOH·nH2O =0.097, the corresponding pH value is 3.4. The calculated potential barrier is 6.31 ×10~-18J according to DLVO model. The size of the colloidal particulates is around 5-10nm, being cross-link as is shown by TEM.

酸分散指数的测定表明当n_/n_(AlOOH·nH_2O)=0.097时，拟薄水铝石可以完全胶溶，稳定水溶胶的pH值为3.4；根据DLVO模型计算的位能势垒为6.31×10~(-18)J；TEM观察溶胶的胶粒为5-10nm，且部分粒子相互网联。

The peptizing mechanism of pseudo-boehmite powder was analyzed, and the multi- nucleus model of colloidal nucleus and electrical double layers model of micelle were proposed, based on the measurement of conductivity, the analysis of IR infrared spectra and the equilibrium profiles of dissolution-precipitation for Al3+ at different pH values.

通过胶溶过程中电导率的测定、胶团表面基团的FTIR分析和Al~(3+)的沉淀溶解平衡的热力学分析，提出了拟薄水铝石的胶溶过程机理、胶核的多核结构模型和胶团的双电层结构模型。

The effect of quantity of water and peptizing acids, temperature and time of reaction on the stability of boehmite sol was analyzed. The influence of filming, gel drying and calcinating processes and template agent on the preparation of γ-Al2O3 NF membrane with excellent quality was discussed in detail.The structure ofγ-Al2O3 NF membranes were studied by N2 absorption and desorption test.

分析了加水量、酸用量、反应温度和时间对伯姆石溶胶稳定性的影响，讨论了涂膜过程、凝胶干燥过程、焙烧过程以及成膜助剂对获得高质量的γ-Al2O3NF膜的影响。

Pseudo-boehmite was prepared with nitric acid and sodium aluminate under the same precipitation conditions but different ageing and washing conditions. The influences of ageing temperature, ageing time and ageing media were studied. It was shown that pronging the ageing time and increasing temperature lead to improve crystallinity of PB., the pore diameter of PB can be increased after NH4HCO3 is added in the ageing medium.

在相同成胶条件下利用铝酸钠溶液和硝酸制备拟薄水铝石，而在不同条件下进行老化，研究了老化温度、老化时间及老化介质的影响，结果表明延长老化时间、提高老化温度和老化pH值有助于结晶度的提高，使用NH4HCO3等具有扩孔作用的溶液作为老化介质会降低产品的堆密度和增加孔径、孔容、比表面积。

The anodised film on Al alloy was dipped in boehmite sol so as to replace dichromate salt sealing used in common.

摘 要：将铝合金阳极氧化膜浸入勃姆石溶胶中进行封闭。

The anodised film on Al alloy was dipped in boehmite sol so as to replace dichromate salt sealing used in common.

将铝合金阳极氧化膜浸入勃姆石溶胶中进行封闭。

Ceramiccoated cemented carbide cutting tools are prepared from aluminum alkoxide solution and carbide substrates by solgel ro ute. The carbide substrates is coated with boehmite sol by dipcoating process and d ried to get gel film.

以异丙醇铝为前驱物，将溶胶-凝胶工艺应用于硬质合金刀片涂层，研制成功一种新型的陶瓷涂层刀片，从而为涂层刀具制造展示了一种全新的涂层方法。

To Al2 (SO4) 3 and different amounts of urea as raw material, two-block copolymer P - b-P the existence, Microwave prepared by the spherical coral Boehmite, 800 ℃ calcining, Alumina is a powder.

以Al2(SO4)3和不同量的尿素为原料，两亲嵌段共聚物P-b-P的存在，利用微波法制备出珊瑚球状的勃姆石，经800℃煅烧后，得到了氧化铝粉体。

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。