Then Br was mixed with silver fluoborate(AgBF4) in methanol and replacement reaction took place.

進(jìn)而利用Br與AgBF4 在甲醇中發(fā)生復(fù)分解反應(yīng)黄片视频吗，合成出了四氟硼酸N-乙基吡啶(BF4)。

Application areas: ability to live fluoborate (HBF4) corrosion.

應(yīng)用領(lǐng)域：能耐住氟硼酸

The tribological behavior of the fluoborate nanoparticles as lubricating oil additive was evaluated by four-ball test machine,where test conditions are following: load 100～ 700 N,rotating speed 1 200 r/min,testing time 10 min.

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Process for the preparation of fluoboric acid from fluosilicic acid,a byproduct of phosphate was introduced.

闡述了利用磷肥副產(chǎn)氟硅酸制備氟硼酸的新工藝日韩精品中文国产字幕。

The electroplate technology of the series of fluoroborate plating liquid and lead-tin alloys are used diffusely in traditional plating industry.

傳統(tǒng)工業(yè)上多采用氟硼酸鹽電鍍液系列和錫鉛合金電鍍工藝久久久久99。

Inhibitors including sodium dodecyl sulfate, boric acid, sulfur, and potassium fluoroborate (KBF4) are added to compare the surface quality of AZ91 casting Experimental results show that adding sulfur in green sand obtained AZ91sand castings with satisfied surface quality and adding KBF4 in green sand produced sand castings with best mechanical properties.

實(shí)驗(yàn)結(jié)果顯示添加硫磺，可得到較佳模砂性質(zhì)且有效控制產(chǎn)生較好的金屬表面品質(zhì)aaaaaa级黄片，添加氟硼酸鉀有較佳機(jī)械性質(zhì)天堂大秀一级黄片。

The main products are inorganic fluoride, with the integrated capacity of 150 thousand tons per year, our main products are: synthetic cryolite, aluminium fluoride, sodium fluoride, silica white, hydrofluoride, potassium fluoroborate, potassium fluotitanate, potassium aluminium fluoride, magnesium fluoride, barium fluoride, lithium fluoride ,potassium fluoride, magnesium fluorosilicate, potassium fluorosilicate, potassium fluorosilicate etc.

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By analyzing these data,it was concluded that:1The combustion of wood,including rate of heat release,total heat release,effective heat of combustion,mass loss rate,smoke ratio,specific extinction area,concentration of CO_2 and the yield of CO_2Y_(CO2,were decreased considerably by the treatment of FRW;2There is a strong synergistic effect of fire retardance between GUP and boric acid;3The trend of MLR curve of FZ was similar to its RHR curve,weight loss and heat release were happened mainly in flaming phase;4Char formation of wood was markedly accelerated by FRW,which indicated that catalytic charring effect of FRW on wood is the primary side in its fire-retardation mechanism.

對(duì)于組成和結(jié)構(gòu)變異性很大的木材而言人人摸人人操大波，由于CONE實(shí)驗(yàn)所使用的樣品量相對(duì)于其他分析方法要大得多黄色网站操美女，因而實(shí)驗(yàn)結(jié)果比較有代表性。此外，CONE實(shí)驗(yàn)可在模擬火災(zāi)條件下進(jìn)行我要看99国产黄片，這是該方法的又一突出的優(yōu)點(diǎn)[5～6]国产a片小黄片。木材阻燃劑FRW主要由磷酸脒基脲和硼酸組成，此外還含有

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S The role of zinc borate in intumescent flame retarded polypropylene was studied by limited oxygen index, thermal degradation analysis and scanning electron microscope.

通過(guò)氧指數(shù)、熱重分析和掃描電子顯微鏡研究了硼酸鋅在膨脹型阻燃聚丙烯中的協(xié)同阻燃作用观看在线精品在线。