The effect of boron to silica molar ratio, basicity, alkali cations, seeds, aging and reaction time on the crystallization was investigated.
考察了凝胶硅硼比、碱度、碱金属离子、添加晶种、老化时间和晶化时间对晶化产物的影响。
Based on this, the influence of water to cement ratio, fly ash and silica fume on porosity of concrete are studied.
本文采用该方法研究了水灰比、粉煤灰、硅灰等对混凝土孔隙率的影响。
There are many kinds color such as white, grey green and dark green in SiC whiskers color which directly relate to the ratio of silica and carbon in the raw materials.
晶须有白色，灰白色，灰绿色，深绿色等多种颜色，其颜色变化与原料中的硅炭比值有直接关系；
The influence of different TMOS/PEG ratio and concentration of porogenic diluent on monolithic silica column was also discussed.
探讨了原料比例和不同制孔剂浓度对整体柱结构的影响。
The leaching ratio of Al2O3 was greater than 97%, and the main component of the residue was amorphous silica by XRD with the optimum operating conditions.
在此条件下，氧化铝的浸取率可达到97%以上。由x -射线衍射分析结果表明，所得酸浸渣的主要成分为无定形二氧化硅。
The optimum content of silica fume is 0.25, and the lowest water to cementitious materials ratio is 0.18.
此时硅灰的最佳掺量为水泥质量的0.25倍，且水胶比并不是越低越好，最佳水胶比为0.18。
The result is good after experimental production. It's not only to elevate the temperature of furnace but also to enhance the use ratio of silica, the production recovery was improved.
经试验生产，取得良好效果，不但可以迅速提高炉温，而且提高了硅石的利用率，进一步提高了生产中主元素的回收率。
The result is good after experimental production. It's not only to elevate the temperature of furnace but also to enhance the use ratio of silica, the production recovery was improved.
经试验生产，取得良好效果，不但可以迅速提高炉温，而且提高了硅石的利用率，进一步提高了生产中主元素的回收率。
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