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氧化锌作用再探讨
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之前发过一个帖子询问了氧化锌在玻璃组分中的作用,在之后的检索中,发现了氧化锌的一些新用途.本人是研究浮法玻璃的新人小菜鸟,以下一段内容摘自PPG1988的一篇专利,针对里面氧化锌的反应部分,我不是特别明白,希望有达人能给予指点. 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. 这段大约的意思是,玻璃中的澄清剂产生的硫会使玻璃着上琥珀色,而氧化锌常被用于漂白硫产生的琥珀色,但在玻璃成型室中氧化锌很容易挥发,最终导致玻璃上留下琥珀色的条纹. 我的问题集中在,澄清剂分解产生能使玻璃着琥珀色硫化物的反应是 Na2SO4(芒硝)+C(炭粉)=Na2S+2CO2,其中硫化钠是琥珀色的来源. 而之后ZnO如何与Na2S反应产生漂白作用呢?之后的产物又是如何在高温下分解的呢? 谢谢.另外求推荐有没有介绍高温下化学反应的资料推荐? |
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2012-11-09 11:46
