硅

Polycarbosilane lower the electronic structure and properties of PCS is a kind of high-molecular compound, the main chain by alternating silicon and carbon atoms of the silicon and carbon atoms are connected to hydrogen or organic group, molecular chains of linear or branch structure.

低聚碳硅烷的电子结构及其性质的研究聚碳硅烷是一类高分子化合物，其主链由硅和碳原子交替组成，硅和碳原子上连接有氢或有机基团，分子链为线形或枝化结构。

Firstly, the specific surface area of nano-coated particle is much larger than that of ordinary wollastonite, and the edges formed in comminuting is passivated, which made the slippy crystal surface coarsened. At the same time, the color of nano-coated particle became whiter, which fit for light ware. Secondly, if the coated wollastonite hasn't been modified by coupling agent, the toughness of PP/ wollastonite composite couldn't be improved.

在硅灰石表面包覆上纳米级SiO2小颗粒对硅灰石的应用特性有重要影响：①纳米包覆粒子填料的比表面积比普通硅灰石大，纳米级SiO2小颗粒钝化了由于机械力粉碎造成的硅灰石的棱角，使其平滑的晶体解理面变得粗糙，同时硅灰石粉体白度增大，可应用于浅色制品。

Through the morphological observation on silicon particles of Al-Si-Cu-Mg cast alloy, it is found, that during solution heat treatment the evolution of eutectic silicon morphology and their effect on mechanical property can be classified into three stages. In the initial stage, necking, stubbing and fragmentation of silicon particles results in an improvement in plasticity of the alloy. In the intermediate stage, the mechanical properties of the alloy attain peak values due to the spheroidization of silicon particles.

在固溶处理过程中，共晶硅相形貌发生了显著的变化，并对合金的性能产生了很大的影响；通过定量金相分析，共晶硅相形貌的演变及其对合金力学性能的影响可划分为三个阶段：固溶初期硅相的熔断和钝化使合金的塑性得到显著的提高；固溶中期以粒化为主，合金的力学性能达到了峰值；固溶后期硅相的粗化符合LSW粗化模型，硅相形貌呈现棱角小面特性，合金性能降低。

From the potential energy profile, it can be predicted that, the dominant channel of this reaction consists of three steps: the two reactants first form a three-membered ring intermediate (INT1) through a barrier-free exothermic reaction of 19.2 kJ/mol; three-membered ring intermediate (INT1) isomerizes to a four-membered ring silylene(P2) via the transition state (TS2) with an energy barrier of 22.8 kJ/mol; four-membered ring silylene(P2) further reacts with ethene(R2) to form a silicic bis-heterocyclic compound (P3), which is also a barrier-free exothermic reaction of 132.2 kJ/mol.

用CCSD//MP2/6-31G*方法研究了单重态二甲基亚烷基硅烯与乙烯生成硅杂双环化合物环加成反应的机理，根据该反应的势能面可以预言，该反应的主反应通道有三步组成：第一步是两反应物（R1， R2）首先生成了一三元环中间体（INT1），它是一无势垒的放热反应，放出的能量为19.2 kJ/mol；第二步是三元环中间体(INT1)经过渡态TS2异构化为了四元环硅烯（P2），其势垒为22.8 kJ/mol；第三步是四元环硅烯（P2）进一步与乙烯(R2)反应生成了硅杂双环化合物（P3），该反应也是一无势垒的放热反应，放出的能量为132.2 kJ/mol。

Organic silicon products can be divided into three kinds: organic silicon singles, organic silicon mid-body and organic silicon products. The key to organic silicon industry is to get goodquality organic silicon singles.

有机硅产品分有机硅单体、有机硅中间体、有机硅产品及制品三大类，进入有机硅行业的关键是取得质优的单体产品。

After dryness, silica powder is put into chlorinated furnace in fluid bed and reacts with dried hydrogen chloride gas in the environment of 340℃ to form crude trichlorosilane. The crude trichlorosilane , through hydroscrubber and pipe bundle condenser to extract silicon tetrachloride in distillation column produces trichlorosilane gas out of the d istillation column , which can be made into the finished product of trichlorosilane by condensation .

硅粉经干燥后加入氯化沸腾炉，与通入炉中的干燥氯化氢气体在340o C进行反应，生成的粗三氯氢硅经湿法除尘器、列管冷凝器去蒸馏塔分离匹氯化硅，由蒸馏塔出来的三氯氢硅气体经冷凝，制得三氯氢硅成品。

The enterprise can be formed as annual production of polycrystalline silicon 1.3 billion, High-purity silicon tetrachloride 1 thousand tons,φ6"—φ12" polishing flake 2.3 million flake, Silicon extension flake 500 thousand flake, SOI silicon Flake 400 thousand flake, all sorts of zone melting grinding silicon flake 3 million flake, High-purity metal and its compound products 100-150 T/year.

十一五&末期，该企业将形成年产多晶硅130吨、高纯四氯化硅1000吨、φ6&—φ12抛光片230万片、硅外延片50万片、 SOI 硅片40万片、各类区熔硅磨片300万片、高纯金属及其化合物产品100—150T/年的生产能力，并将与新兴硅业、乐山安森美等企业形成完整的硅产品产业链和高纯金属产业基地。

It is analysed by insiders that our national organic silicon industry is at high speed developing period, and at present, the national organic silicon only has 500 kinds; the compound manufacturing and processing capability do not meet the market demand, especially the methyl chloride silicon hydride making, has become the neck of our national organic silicon, so it have active and real meaning to build this project of organic single silicon and its sub-item products.

据权威人士分析，我国有机硅产业正步入高速发展时期，而目前，国内有机硅产品仅500多个品种，聚合物生产及加工能力均不能满足市场发展的需求，尤其是甲基氯硅烷单体生产远不能满足国内市场的需求，已成为制约我国有机硅生产发展的&瓶颈&，建设有机硅单体及下游产品项目具有积极和现实的意义。

After the project completion, it has 100,000 tons / year organic single silicon productive capability( accounted by the methyl chloride silicon hydride), 45,000 tons/ year organic silicon including 20,000 tons/year silicon oil, 10,000 tons/ year silicon rubber, 6,000 tons /year silicone, 6,000 tons/year silicon hydride resin acceptor, and 3,000 tons/year others.

项目建成后生产有机硅单体10万吨/年，生产有机硅产品4.5万吨/年，其中硅油20000吨/年，硅橡胶10000吨/年，硅树脂6000吨/年，硅烷偶联剂6000吨/年，其它3000吨/年。

Upstream has formed an annual output of 300,000 tons has a high-quality silicon mines, when the glass holding company Silicon Mine Ichang limited liability company is a large production base of raw materials of silica, there are two domestic beneficiation of silica sand advanced production lines, annual output of fine quartz sand 300000 t / a, is South Africa's largest silica sand base; mid-stream has a 450t / d, 500t / d float glass production lines and 600 / t self-cleaning glass substrate production line of the article, an annual output of float glass production capacity of 10 million weight boxes; downstream has a glass cover, TiO2 thin-film self-cleaning glass, tempered glass, insulating glass, such as a number of glass deep-processing production lines, processing 3 million square meters of glass products.

上游已形成拥有年产30万吨的优质硅矿，控股公司宜昌当玻硅矿有限责任公司是大型硅质原料生产基地，建有2条国内先进的硅砂选矿生产线，年产石英精砂30万t/a，属中南地区最大的硅砂基地；中游拥有450t/d、500t/d浮法玻璃生产线和600/t自洁玻璃基片生产线各一条，年产浮法玻璃1000万重量箱生产能力；下游拥有强化玻璃盖、TiO2薄膜自洁玻璃、钢化玻璃、中空玻璃等多条玻璃深加工生产线，年加工玻璃制品300万平方米。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。