氟化

This paper presents the development and the actual state of nitrogen trifluoride in China,analyzed the market of nitrogen trifluoride and give the advice.

综述了我国三氟化氮的发展和现状，分析了市场形势，并提出了三氟化氮今后发展的对策。

For purification of nitrogen trifluoride(NF3) which is used as a plasma etchant and cleaning gas for chemical vapor deposition chambers, a few purification methods and equipments may be chosen according to difference in boiling points and physico-chemical properties of NF3 and its impurities.

三氟化氮作为等离子蚀刻剂和化学气相沉积室的清洗气体，可根据粗三氟化氮气体中各组分的沸点及物理、化学性质的差异选择不同的纯化工艺及设备。

Treat each flask as follows. Add 5.0 mL of a solution prepared by dissolving 14 g of boron trifluoride in methanol to make 100 mL, swirl to mix, and reflux for 15 minutes or until the solid is dissolved.

在每一个锥形瓶中，加5.0mL三氟化硼溶液（取14g三氟化硼，用甲醇溶解并稀释至100ml），搅拌使混合，回流15分钟或直至固体物溶解。

Determination of the uranium content in nuclear grade uranium hexafluoride, uranyl fluoride solutions, uranyl nitrate solutions, uranium oxide, uranium dioxide, powder and pellets; gravimetric method

核子纯的六氟化铀。氟化铀溶液。硝酸溶液。氧化铀粉末。二氧化铀粉末和颗粒铀含量的测定。重量分析法

Conductive polythiophene film was electrochemically deposited by direct oxidation of thiophene in boron thrifluoride diethyl etherate and in the mixed electrolyte of BFEE and acetonitrile.

用电化学方法分别在纯的三氟化硼乙醚离子溶液中，三氟化硼乙醚+乙腈溶液中在导电氧化锢锡ITO电极上成功聚合噻吩。

The result indicated that: the solubility of phosphorus pentafluoride in aether was decreasing as temperature rising; when temperature rises from 0℃ to 30℃, the solubility of phosphorus pentafluoride in aether decrease from 1.5448g/mL to 0.7335g/mL.

通过实验发现，五氟化磷在乙醚中的溶解度随温度的升高而下降，当温度从0℃上升至30℃时，五氟化磷在乙醚中的溶解度从1.5448g/mL下降到0.7335g/mL。

Although they may also be used with fluorinated solvents, we suggest that you investigate our High Performance Degreasing Equipment for those applications.

尽管仍有人会使用氟化的溶剂，但我们建议您在High Performance脱脂机上使用氟化的溶剂。

The research on fluorinated polyurethane-acrylate emulsions were reviewed in this article,including the aspects of categories,structure characteristics,synthesis methods and properties.

介绍了目前国内外氟化聚氨酯-丙烯酸酯乳液的研究现状，综述了已见报道的氟化聚氨酯-丙烯酸酯乳液的种类、结构特点、合成工艺以及性能，并指出了国内相应领域研究的不足和今后研发的重点和方向。

Especially, chiral metal complexes and organo-catalysts in combination with electrophilic fluorinating reagents have found applications to the synthesis of a variety of chiral fluoroorganic compounds.

特别是，手性金属配合物和有机催化剂诱导的不对称催化氟化反应被广泛应用于各类手性氟化物的合成，已成为不对称氟化反应研究的热点。

In this paper,NBR was modified by fluorinating with XeF2 and the reaction kinetics of fluorination was studied by FT-IR spectrometry.The apparent reaction order of 1.5 was suggested,which seemed to become less for long reaction time.

目前报道的高分子表面氟化改性的方法很多，主要的方式有：辐射接枝法、等离子体活化法[1，2]、静电喷涂法、离子注入法及氟化剂表面化学反应法[3—7]等。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐