查询词典 silicon dioxide

In order to find an efficient way to enrich the silicon dioxide(SiO2) in straw, cornstalk was taken as an example. In this research, a new process consisting of steam-explosion, carding, sifting was employed to fractionize the cornstalk, followed by the quantitative analysis of silicon dioxide of the different parts of cornstalk.

为了研究秸秆中SiO2的富集方法，该文以玉米秸秆为研究对象，利用汽爆、梳理加筛分的方式对秸秆进行分级处理，并采用重量法、扫描电镜和X-射线衍射等技术对分级前后秸秆中二氧化硅的含量、迁移规律以及结构变化进行了分析。

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。

There is a protective coating of silicon dioxide on the silicon carbide.

在棒的表面有一层二氧化硅保护涂层。

Forming thick silicon dioxide films on silicon substrate is one of the most important and difficult processing.

在硅衬底上制备厚的二氧化硅膜是工艺难题之一。

Of particular note: Alkylated Silicates form Carbon Dioxide, water, Silicon Dioxide and Oxygen.

特别注意：烷基化硅酸盐形式二氧化碳，水，二氧化硅和氧。

Cellulose, mannitol, hydroxypropyl methylcellulose phthalate, citric acid, sodium starch glycolate, glyceryl triacetate, modified cellulose gum, stearic acid, colloidal silicon dioxide, titanium dioxide and yellow ochre.

纤维素，甘露醇，羟丙基甲基纤维素邻苯二甲酸酯，柠檬酸，淀粉钠乙醇，三醋酸甘油酯，改性纤维素胶，硬脂酸，胶质二氧化矽，二氧化钛和黄赭色。

In this paper, aiming to solve these problems and meet the developmentrequirement, firstly a series of grafted starch sizing agent with good pasting and excellentsizing performance were synthesized utilizing the cheap mealie starch as the reactants.The denatured starch, polyacrylic size combination, nanometer compound acrylic acidcopolymerization pulp with titanium dioxide, the silicon dioxide has designed a series offormulas. The results showed the polyester size had stable viscosity and excellentfilm-formation property, thus it was a good size for fiber. At last, a kind of mixed sizeswas presented to reach the satisfied results of high density and low viscosity.

本文针对当前浆料存在的问题，结合浆料发展的趋势，立足于廉价的玉米淀粉，开发制备了性能优异的接枝淀粉，该浆料上浆性能优异且退浆容易，是一种能获得较好经济效益和社会效益的绿色浆料；将变性淀粉、丙烯酸乳液聚合浆料、纳米二氧化钛和二氧化硅乳液共聚浆料组合，设计了一系列配方，在对这些配方进行了一系列性能测试的基础上，找到了一种无PVA且价格低廉的组合浆料。

Meanwhile, the relationship between microstructure and physical properties is very important, and the existing position of silicon dioxide in the cell wall of wood and their bonding type influences the physical properties of silicon dioxide/wood composite.

同时，分析微细构造与物性的关系，即二氧化硅的存在空间位置、二氧化硅与木材的结合方式对二氧化硅/木材复合材料物性产生的影响。

The silicon dioxide was found in the Matrix region of cell wall of wood for silicon dioxide/wood composite.

构筑了二氧化硅进入木材细胞壁的超微构造图，介入Matrix区域。

In this dissertation, based on glass microspheres and submicron silicon dioxide, the silver-coated core-shell shielding particles were prepared by liquid phase chemical deposition and layer by layer packing technology. The influences of the preparation conditions on the structure of the synthesized core-shell particles were also systemically studied. The conclusions are enumerated as follow:(1) Monodispersed submicron silicon dioxide spheres in the size range of 250～550 nm are synthesized by Sol-Gel method using ammonia as catalyst.

本文在前人研究的基础上设计出以微米级玻璃微珠为基核，采用液相化学沉积法和层层包裹法制备表面包银的核壳粒子电磁屏蔽剂，并对液相化学沉积法和层层包裹法的制备工艺进行了系统研究，取得了以下主要结论：(1)以氨水作催化剂，采用溶胶－凝胶法制备了粒径分布在250～550 nm之间的二氧化硅微球。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。