硅

The SiCaBa alloy can deoxidize the liquid steel further instead of SiBa an SiCa and can effectively reduce cost improve the product quality.

硅钙钡合金可代替硅钡、硅钙对钢液进行深脱氧，能有效地降低成本和提高产品质量。

Combining ion exchange process and silicon hydrolyze process Silicon dioxide mother nuclide with a specific particle size was prepared from sodium silicate through the dropwise technique , then the large particle size , high concentration and stable silica sol was prepared . The stability of silica sol also can be improved by enwrap .

和"单质硅一步溶解法"相结合的方法，用离子交换法制备晶种，并采用滴加工艺制备一定粒径大小的二氧化硅作为母核，在催化剂和分散剂共同作用下水解单质硅的方法使二氧化硅母核颗粒进一步增长成大粒径的二氧化硅颗粒，并另外还采用水溶性高分子对纳米SiO_2粒子进行"原位表面包覆"提高其稳定性，制备了大粒径，高浓度，稳定的纳米硅溶胶。

This paper expatiate TP touch screen as a epigyny machine management system and the Plc system applied in the silicon oil emulsification and production,This system provide great advantage in the silicon oil emulsification and production,the main system specialties are the TP is communicated with PLC by RS232,greatly improving the efficiency of the silicon oil emusification and production with few malfunction and easy to real time inspection.

本文主要阐述了TP触摸屏作为上位机管理系统与 PLC通讯在硅油乳化生产中的实际应用，该系统在硅油乳化生产中有较大的优越性，系统特点是触摸屏与系统通过 RS232 串行通讯，达到管理与控制相结合，便于实时监控，减少了故障率，大大提高了硅油乳化的生产效率。

In 1997. Our company owns a fixed assets of 6 million RMB and a total area of 10,600 square meters. With powerful technical strength, it is the largest production base for r-chloropropyl, ethylene series silane coupler. And it is the member of China Organosilicon Association.

公司现有固定资产600多万元，占地面积10600平方米，科研技术力量雄厚，是全国较大的γ-氯丙基硅烷偶联剂、乙烯基硅烷偶联剂系列产品的生产基地，是中国有机硅协会认证的会员单位。

After the modification with RE at temperature around 800 C, we have got granular and stubby eutectic silicon.

RE在800℃左右对含硅量为20％的铝硅合金进行变质处理，可获得颗粒状或短杆状的共晶硅。

Ferrosilicon with high silicon content can be used in the manufacture of silicon- ketone in the chemical industry.

在焊条制造业中可作为焊条的涂料。高硅硅铁在化学工业中可用于制造硅酮等产品。

My company's main export and domestic sales have Ferrosilicon Products, silicon slag, micro silica fume, etc..

我公司出口以及内销的主要产品有硅铁、硅渣、微硅粉等。

The work done previously is experiential. To this day, the researches on silicon nitride thin film prepared by PECVD stay initial stages, so it is necessary to further develop PECVD. On the other hand, it is essential to prepare high quality silicon nitride thin film for gate insulator layer of TFT in order to get excellent TFT.

前人做的工作大多也都是经验性的，至今人们对PECVD 氮化硅薄膜的研究还很不成熟，尚处于研究探索的阶段，从而在理论上有必要对PECVD 法氮化硅薄膜做进一步的研究；与此同时，制备高质量的栅绝缘层用氮化硅薄膜也是制备高性能薄膜晶体管这一课题的需要。

Combining the experimental results and theoretical analysis, the following work has been accomplished.(1) Reasons of the decrease of interelectrode capacitance and the increase of discharge gap caused by the powder suspended in dielectric fluid are explained. And the mechanism that surface quality of workpiece improved by powder-mixed EDM is analyzed from this viewpoint.(2) The variation regularity of the percentage of silicon on the machined surface of workpiece has been summarized according to the experiment results when silicon powder was added into the working fluid. The entropy is introduced to explain the reasons for this variation regularity by thermodynamics.(3) The dimensional accuracy is greatly influenced by the overcut resulting from discharge gap and electrode wear in practice application. Empirical formulas for the overcut in EDM and powder-mixed EDM are established based on the experimental results using the ternary linear regressive method in this paper.(4) The influence of main factors on the machined surface characteristics has been evaluated based on the orthogonal experimental design method.

通过一系列普通电火花加工与混粉电火花加工的对比实验，运用工艺实验和理论分析相结合的方法，重点做了以下工作：(1)探讨了粉末颗粒导致极间电容减小、放电间隙增大的原因，并从这个角度解释了混粉电火花加工可以改善工件表面质量的机理；(2)以混合硅粉的电火花加工为例，实验得出峰值电流和脉冲宽度对加工表面层成分中硅元素含量的影响规律，并引入熵的概念从热力学的角度对硅元素含量变化的原因寻找了理论依据；(3)在实际加工中，由于粉末的加入使放电间隙变大，这使得混粉电火花加工的尺寸精度难以控制，本文利用三元线性回归的方法，在实验数据的基础上，建立了两种电火花加工过切量的计算公式；(4)将正交试验法应用于混粉电火花加工实验研究，并通过对实验指标极差的直观分析，得出各电参数对加工指标影响的敏感程度。

Recent developments in the synthesis,modification and catalytic properties of titanium silicalite molecular sieve are reviewed,including the developments in the synthesis of TS-1 with hydrothermal and isomorphous replacement methods,the modification of TS-1,as well as applications in catalytic oxidation and acid catalysis systems.

本文重点综述了近年来钛硅分子筛催化材料的合成、改性及其催化应用的研究进展，包括钛硅分子筛（TS-1）的水热合成方法和同晶取代合成法、改性、成型与负载以及钛硅分子筛催化氧化功能和酸催化功能的研究。

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。