二氧化硅

The modified silica had dispersing ability and could be applied in the detergent ...

改性后二氧化硅有一定的再分散性，能够应用在洗涤助剂中。

Scanning electron microscopy observed that the mesoporous silica single crystal had a regular rhombic dodecahedron morphology with a uniform particle size of 5 μm.

扫描电子显微镜观察到这种介孔二氧化硅单晶具有菱形十二面体形貌， X射线衍射和透射电子显微镜测试结果证实这种介孔单晶属于简单立方Pm3n对称结构。

Based on silica on silicon, all the manufacture processes are implemented. At last the fabricating of some EDG chip samples is made.

对设计好的集成波导器件，本论文分别采用硅基二氧化硅波导结构，实现了器件制作的全部工艺研究，并实现了器件样品的制作。

The present invention relates to preparation technology of electromagnetically responding composite grain, and is especially one kind of porous composite silica/nickel/titania grain in core-shell structure and its preparation process.

本发明涉及一种电磁响应性复合颗粒的制备技术，特别涉及一种多孔二氧化硅/镍/二氧化钛核-壳结构的复合颗粒及其制备方法。

Companies are professional development, production sales silica electrothermal components, high-temperature experimental furnace, tungsten and molybdenum products, high-tech enterprises.

公司是专业研制，生产销售二氧化硅电热元件，高温实验电炉，钨钼制品的高新技术企业。

Two triphase catalysts of comb-like polyether s supported by silicas were synthesized,and their catalytic behavior in the iodo-substitution,etherization and the addition reaction of dichlorocarbene to styrene were also studied.

以表面经偶联剂修饰的二氧化硅为载体，通过聚(β-氯乙基缩水甘油醚)和醇钠反应，合成了两种梳状聚醚三相转移催化剂，研究了它们在碘代、二氯卡宾对双键加成和混合醚制备反应中的催化活性。

This dissertation aims to: improvement in regularity of ladderlike polysiloxane through strong H-bonding template and"half-water-hydrolysis"methods; synthesis of several functional polysilsequioxane with ethoxyl, hydro and aminopropyl groups respectively; and the preparation of nanoporous film with good mechanic properties from ladderlike functional polysilsesquioxane with intermolecular porogen via micro-phase separation process.

本论文旨在利用强氢键模板作用和"半水水解-脱氯化氢缩聚"的改进方法，提高反应性的梯形聚硅氧烷的规整度；合成乙氧基封端、含氢基和氨丙基的几种功能性梯形聚硅氧烷；以及探索利用含分子内成孔剂的梯形聚倍半硅氧烷通过微相分离制备低介电常数二氧化硅纳米微孔膜。

Acid electrode main component of skin medicine acidic oxides such as silica, titanium dioxide, ferric oxide and so on.

酸性焊条药皮的主要成分为酸性氧化物，如二氧化硅、二氧化钛、三氧化二铁等。

The proposed method was fast,accurate,simple,and has been applied to determine silicon dioxide content in the fluorspar in the routine determination wi.

研究了硅钼蓝分光光度法测定氟石中二氧化硅含量的快速分析方法。

Based on the establishment of a model of silicon dioxide structure, the effect of germania concentration across the fiber core on Raman gain spectrum was analyzed by the method of Gaussian decomposition.

分解图谱表明掺杂物破坏了二氧化硅的分子结构，并在拉曼增益范围内产生了新的峰值，从理论上证明了光纤掺杂物对拉曼增益系数和增益谱的影响。

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％。