氟化硅

The water from cleaning silicon residue could be used as water-confected in refining epsom salt.

对于采用氟化物助浸所产生的氟化硅(SiF_4)气体环境问题，采用空心喷淋塔喷淋清水吸收方式处理。

A patent for fluorosilicic acid production by adsorption of silicon tetrafluoride with pressure water is described in the production of wet-process phosphoric acid or phosphate fertilizer.

介绍一种在湿法磷酸或磷肥生产过程中用水吸收四氟化硅制备氟硅酸的专利技术。

Its specific procedures are :first to treat the sample with hydrofluoric acid to convert the silica into a gas of silicon tetrafluoride to escape, and then at a PH value of 4 to 5 to treat the residual liquid with hydroxylamine hydrochloride to get the ferric ions reduced to ferrous ions.

其具体步骤为：首先用氢氟酸处理试样，使沉淀法白炭黑转化成四氟化硅气体逸出。

Low-quality fluorite mine ; prepare ; cryolite ; silicon tetrafluoride

低品位萤石矿；制备；冰晶石；四氟化硅

The crosslinked PEG-20M glass capillary column was prepared by dynamic coating method with boron trifluoride as catalyst,3-glvcidyl-oxypropyl-trimethoxysilane as crosslinking agent.

以PEG－20M为固定相，三氟化硼为催化剂，3－缩甘油氧丙基三甲氧基硅烷（简称KH－560）为交联剂，二氯甲烷为溶剂，对预先用氯化钠沉积法粗糙化的玻璃毛细管柱进行动态涂渍。

β-Cyclodextrin with the 6-hydroxyls protected by dimethyl-tert- butylsilyl was selectively oxidized by lead tetraacetate. After the silyl groups were removed off by boron fluoride-etherate, mono-2,3- dialdehydro-β-cyclodextrin as a cuniform molecule could be constructed.

用四醋酸铅将七元（6-O-二甲基叔丁基硅基）-β-环糊精选择氧化、并用三氟化硼乙醚脱硅基保护基后，再经分离、纯化，可获得具有&楔筒状&空腔的单-2， 3-二醛基-β-环糊精。

PTFE slurry in HNO〓 was used as fluorinating reagent to convert the silica matrix into high-volatile fluoride, which was subsequently evaporated by selective vaporization prior to the atomization of analytes.

首次报道了以PTFE为氟化剂，通过高温氟化反应和选择性蒸发原位分离基体硅的新方法。

Silicon oxide/Fluorinated amorphous carbon/Silicon oxide multiple-layered films and one-layered Fluorinated amorphous carbon films were prepared using Microwave electron cyclotron chemical vapor deposition reactor with SiH4, O2, CHF3 and CH4 as source gas and were annealed in nitrogen ambience in order to investigate their thermal stability.

食用80％Ar稀释的SiH4，O2，CHF3和CH4作为前驱气体，利用微波电子回旋共振等离子体化学气相沉积方法制备了氧化硅／氟化非晶碳膜／氧化硅(SiO_x／a-C：F／SiO_x)多层膜与单层的氟化非晶碳膜，并在N_2氛围退火处理中考察其热稳定性。

While the sample was dissolved in nitric acid and hydrofluoric acid, the silicon in sample was removed through evaporating in the form of silicon fluoride. As a result, the matrix interference was eliminated, and meanwhile the high blank value as well as the influence on the life span of graphite tubes due to perchloric acid was avoided.

使用硝酸和氢氟酸消解样品，使硅生成氟化硅蒸发掉，消除了基体的干扰，也避免了使用高氯酸作为消解试剂所引起空白值高及对石墨管寿命的影响。

The main purpose of this study is to develop method for control the chemistry on silicon surface at microscopic scale.

研究工作的目的是发展在微米尺度控制硅表面化学的方法，主要开展了两方面的工作：一、系统地研究了硅和二氧化硅在氟化铵水溶液中的腐蚀规律；二、。。。

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