石英

The separation mechanisms of powder quartz and clinochlore as well as the adsorption mechanism of the anionic collector were investigated.

采用油酸作阴离子捕收剂，用反浮选的方法对粉石英的纯化进行研究，探讨粉石英和斜绿泥石的分离机理以及捕收剂的吸附机理。

The purification of powder quartz was studied through reverse flotation by using oleic acid as the anionic collector. The separation mechanisms of powder quartz and clinochlore as well as the adsorption mechanism of the anionic collector were investigated.

采用油酸作阴离子捕收剂，用反浮选的方法对粉石英的纯化进行研究，探讨粉石英和斜绿泥石的分离机理以及捕收剂的吸附机理。

In the experiment,ζ-potential of the two minerals were measured, and the effects of pH, concentration of oleic acid and flotation time on the purity and recovery of SiO2 were tested. Furthermore, the crystal structure, surface characters of quartz and clinochlore, and the solution chemistry of oleic acid as the anionic collector were analyzed.

实验中测定粉石英和斜绿泥石的ζ电位、pH值、油酸浓度、浮选时间对SiO2回收率和纯度的影响；分析粉石英、斜绿泥石的晶体结构和表面性质以及油酸作阴离子捕收剂时的溶液化学。

The results show that quartz cannot react with oleic irons at pH=8-10, because it is difficult to combine with metallic irons. On the contrary, clinochlore can adsorb with oleic ions because there are enough active metallic positive ions between the minerals layers which can combine with clinochlore. The clinochlore can be hydrophobic, and so the separation can be realized finally. At pH=9, the clinochlore removal rate is the maximum, the purity of SiO2 is 99.86%, and the recovery of SiO2 is 35%.

结果表明：在pH为8~10的碱性溶液中，粉石英难与金属阳离子缔合，所以，不与油酸根离子结合；而斜绿泥石解离后层间存在活性金属阳离子，可与油酸根离子发生化学吸附产生疏水作用，因而使用反浮选的方法能有效地实现二者的分离：当pH为9时，斜绿泥石的去除率最高，粉石英的纯度达99.86%，回收率为35%。

The experimental results congruously show that the sandstone aggregate is alkali-silica reactive, and the reactivity mainly results from chalcedonic microcrystalline quartz and undulated extinction quartz.

试验结果一致表明了该砂岩骨料具有潜在的ASR活性，其碱活性主要来自于玉髓状微晶石英和波状消光石英。

In this paper, the relationship between volume of cell and temperature for quartz and cristobalite was analyzed.

建立了石英、方石英晶体的介电常数和温度之间的规律，并且发现在从α-β转变过程中，介电常数相关参数都显著变小。

However,the crystallization of cristobalite at elevated temperature has restricted its further application.

但是，石英及其复合材料在高温下很容易生成方石英相。

Silica is an important structural and functional material, which is widely applied in the fields of aero craft, semiconductor, electronic telecommunication, and optical devices. However, the crystallization of cristobalite at elevated temperature has restricted its further application.

石英是一种重要的结构和功能材料，在航天飞行器、半导体、电子通讯和光学器件等领域得到重要应用，但是高温下方石英的析晶限制了它的进一步应用。

The reflective index of cristobalite is reduced from 1.55 of quartz to 1.48, near to the reflective indexes of PE, PP and some resins.

方石英的折射率从石英的1.55下降到1.48，更接近PE、PP及一些树脂的折射率。

The formation of α-quartz and cristobalite in the composites containing above 50% ceramic content during the sintering process has bad effect on thermal expansion behaviour, but has little effect on the values of dielectric properties of the composites.

锶长石含量大于50%的复合材料中α石英和方石英的析出增加了材料的热膨胀系数，但对材料的介电性能影响不大。

This is not an ordinary box, which is used as a background picture of the dialog box, very pretty.

详细说明：这可不是一个一般的对话框，它是用图片作为背景的对话框，非常好看。

Conceal me what I am,and be my aid for such disguise as haply shall become the form of my intent.

遮掩我的身份，帮助我，我的面具将成为我的目的。