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[交流]
氧化鋅作用再探討
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之前發(fā)過一個帖子詢問了氧化鋅在玻璃組分中的作用,在之后的檢索中,發(fā)現(xiàn)了氧化鋅的一些新用途.本人是研究浮法玻璃的新人小菜鳥,以下一段內(nèi)容摘自PPG1988的一篇專利,針對里面氧化鋅的反應(yīng)部分,我不是特別明白,希望有達人能給予指點. Furhtermore, it is taught that in glass in which sulfur is present as a refining aid, as would be the case with most commercially produced flat glass, substantial amounts of zinc oxide should be included to prevent the formation of amber coloration when reducing conditions are imposed. But glass containing zinc oxide has been found to be incompatible with the float process, by which most flat glass is produced.This is due to the volatility of zinc oxide in the float forming chamber,which not only contaminates the interior of the chamber, but also leads to amber streaks in the glass where the zinc oxide content has been depleted. 這段大約的意思是,玻璃中的澄清劑產(chǎn)生的硫會使玻璃著上琥珀色,而氧化鋅常被用于漂白硫產(chǎn)生的琥珀色,但在玻璃成型室中氧化鋅很容易揮發(fā),最終導致玻璃上留下琥珀色的條紋. 我的問題集中在,澄清劑分解產(chǎn)生能使玻璃著琥珀色硫化物的反應(yīng)是 Na2SO4(芒硝)+C(炭粉)=Na2S+2CO2,其中硫化鈉是琥珀色的來源. 而之后ZnO如何與Na2S反應(yīng)產(chǎn)生漂白作用呢?之后的產(chǎn)物又是如何在高溫下分解的呢? 謝謝.另外求推薦有沒有介紹高溫下化學反應(yīng)的資料推薦? |
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