硅酸

Because we will control the content of alkali in clinker, although the clinkerability of high silicon low alkali gritstone composition is insufficient a little, but it"s a good composition. The best control parameters of high silicon low alkali gritstone composition are: adopting "three-high rates composition, in a specific way, three rates should choose KH:0.9, SM:2.6, IM:1.6, and control the granularity of raw material is 280m /kg.

从控制熟料中碱含量的角度出发，高硅低碱砂岩配料虽然易烧性略差，但仍不失为一个好的配料方案；高硅低碱砂岩配料方案的最佳控制参数为：采用"三高"配方，熟料的饱和比0.9，熟料的硅酸率2.6，熟料的铝氧率1.6，生料的细度控制在280m~2／kg。

With oxalic acid and hexamethylenetetramine as the catalysts, and phenolic resin and tetraethoxysilane as the starting materials, a two-step sol-gel processing is developed for preparing Si〓N〓/SiC precursors with homogeneous microstructure composed of nanometer sized particles.

用草酸和六次甲基四胺为催化剂，酚醛树脂和正硅酸乙脂为原料，探索出了制备结构均匀而精细的Si〓N〓／SiC前驱体的溶胶—凝胶两步法。

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

The influence factors such as molar ratio of hexyl alcohol to propionic acid,amount of catalyst, and reaction time on the yield of hexyl propionate were discussed.

以钨硅酸为催化剂，通过丙酸和己醇反应合成了丙酸己酯，探讨了醇酸物质的量比、催化剂用量及反应时间对酯化率的影响。

Contains Horsetail Herb Extract, a natural source of silicic acid, and silica, traditionally associated with healthy hair and nails.

包含马尾提取物，一种天然的硅酸和硅石，传统上认为与头发和指甲健康有关。

The results show that the hydrofluoric acid is a effective catalyst for the gel formation.

以正硅酸乙酯为硅源，分别以HF和HF/氨水为催化剂，通过溶胶-凝胶法常压制备SiO2气凝胶。

This article highlights the proprietary technology used to produce anhydrous hydrogen fluoride with fluorosilicic acid in foreign countries,as well as the scientific research achievem.

介绍了国外用氟硅酸生产无水氟化氢的专利技术以及四川大学的科研成果，认为经过中试获得必要的设计参数，便可推广应用，市场前景看好。

Various technologies, including direct or indirect methods, for the preparation of hydrogen fluoride and white carbon black from the byproduct fluosilicic acid of phosphate fertilizer are introduced, advantages and disadvantages of all the preparation methods are concluded.

介绍了直接法和间接法由磷肥副产的氟硅酸制备氟化氢和白炭黑的多种技术，总结了各种制备方法的优缺点。

The high temperature impact fatigue characteristics of aluminum matrix composites reinforced by aluminum silicate fibre in comparison with ZL109 by squeeze casting has been studied.

采用加压铸造法来制备硅酸铝短纤维增强铝合金复合材料，并通过与ZL109合金的对比试验，研究高温下材料的冲击疲劳特性。

Work, in the drainage extraoral insert point silicate fiber cotton, and to prevent cold air from entering the furnace temperature and impact.

工作时，在排流口外塞入一点硅酸铝纤维棉，可防止外冷空气进入炉膛而影响炉温。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。