氧化钙

The higher CaO content in phosphate rocks will affect the nitric acid consumption, the crystallization of calcium nitrate tetrahydrate and its filtering charge, the viscosity of neutralized slurry and product quality.

磷矿中氧化钙含量偏高将影响：硝酸消耗；四水硝酸钙的结晶与过滤负荷；中和料浆粘度与产品质量。

Shenmu coal contains high content of calcium,so the content of calcium oxide in the coal ash is also very high.

神木煤的含钙量较高，使得燃烧后煤灰中氧化钙含量也很高。

Mainly composed of silica, alumina, iron oxide, magnesium oxide and calcium oxide.

主要成分为氧化硅、氧化铝、氧化铁、氧化镁和氧化钙等。

The distribution of temperature stress was calculated by finite element analysis. The results showed when the surface temperature of concrete was higher than 110℃, the temperature stress was more than 4 MPa without regard to the creep. This might be lead to the damage of the surface of concrete. At the same time, a lot of microstructure analysiss such as XRD, SEM, IR, HSA etc. were done to analysis the difference of the component and microstructre of concrete before and after corrosion. The results indicated that the decomposion of CSH gel and calcium hydroxide and the creation of dilatability calcium oxide were the internal reason of the deterioration of concrete in the corrosion form of high heat.

该文通过有限元方法计算了由于温度而产生的结构应力分布，计算结果表明当混凝土表面温度超过110℃时，如不考虑徐变时表层混凝土受到的温度应力将超过4MPa，这使得表层混凝土很容易因温度应力而破坏；同时通过X射线衍射分析、扫描电子显微分析和混凝土孔结构分析等多种微观结构测试手段，分析了混凝土受热前后的宏观性能以及微观组成和结构的变化，指出混凝土原水化产物如水化硅酸钙凝胶和氢氧化钙的分解以及膨胀性产物氧化钙的产生是高热腐蚀形式下混凝土破坏的内在原因。

Quicklime is calcium oxide or calcium-magnesium oxide.

生石灰是氧化钙或钙镁氧化物。

It was concluded by the X-ray photo spectroscopy that the friction performance of metals could be improved by the lube containing nanosize CaCO3 particles due to the coaction of three matters CaCO3, CaO and Ca during friction process.

通过X射线光电子能谱法得出：含有纳米碳酸钙粒子的润滑油，在摩擦过程中通过碳酸钙、氧化钙、钙三种物质共同作用提高金属的摩擦学性能。

The thermodynamic calculation results indicated that the formation of calcium aluminate hydrate from aluminate solution with CaO is easier than that with Ca2, and the value of αk is great at low temperature; the temperature rise leads to the reduction of stability of calcium aluminate hydrate in the aluminate solution, and it can be decomposed at high temperature, which can both substitute for Ca2 and recover alumina in the process of Bayer.

热力学计算结果表明，氧化钙较氢氧化钙更容易使铝酸钠溶液中的铝酸根离子转化为水合铝酸钙，使铝酸钠溶液的平衡苛性比能达到很高的值；水合铝酸钙随着温度的升高，稳定性降低，因而能在拜尔法高温溶出过程中分解以代替石灰，并回收其中的氧化铝。

The study compared the xonotlite synthesized by crystal silicon and amorphous silicon mixed with calcium oxide and treated in the sealed steel alloy autoclaves, the synthesize temperature and time were studied.

采用晶体与非晶态硅质原料，与氧化钙在高压釜中进行动态水热反应，合成晶须状硬硅钙石晶体，研究合成温度，保温时间等工艺参数对最终结晶产物的影响，并使用XRD、SEM对水热合成的产物进行分析。

A series of calcium borates were hydrothermally synthesized at different temperature using boric acid,borax and calcium oxide as raw materials.

以工业硼酸、硼砂和氧化钙为原料，通过改变反应温度和原料配比，用水热法合成了系列硼钙化合物。

The invention makes full use of sulphur in the high-sulphur coal and the coal gangue to produce stable SO2 with high concentration and provides qualified feed gas for acid-making technique; calcium sulfate is reduced and decomposed to obtain calcium oxide slag which is taken as raw material for producing cement.

本发明充分利用了高硫煤和煤矸石中的硫，产生稳定高浓度的SO 2 ，为制酸工艺提供合格的原料气，硫酸钙还原分解后的氧化钙渣作为制水泥生产的原料。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。