The tinting phenomena of iron oxide contained glasses were studied from aspects of the electronic configuration, the iron ions coordination fields and the ions structure in glass. Several iron ion tinting forms at dif...The tinting phenomena of iron oxide contained glasses were studied from aspects of the electronic configuration, the iron ions coordination fields and the ions structure in glass. Several iron ion tinting forms at different redox or COD (chemical oxygen demand) conditions and their influential factors were given necessary explanations. The results reveal that the Fe^(3+)-O-Fe^(2+) structure is the real tinting reason of iron involved glasses, whereas the Si^(4+)-O-Fe^(3+) and Si^(4+)-O-Fe^(2+) formulations modify the glass colours. Under oxidizing melting condition, the amount of 4/6-coordinated Fe^(3+) increases and makes the glass colour yellowish. Conversely, reducing melting condition makes the 6-coordinated Fe^(2+) increased and gives much blue tint to the glass. The conventional tank furnace melting the very strong reducing condition, which is of high COD glass batch, is not suitable. The high ratio of ferrous/ferric in glass can be obtained with a new refining technology which contains no or little amount of refining agent.展开更多
研究了MI为20、40、80 g/10 min 3种LDPE对色母粒MI和流变性能的影响,分析了色母粒MI、流变性能与着色力、分散性的关系。结果表明:3种LDPE含量相同,其MI越高色母粒加工流动性能越好。色母粒着色力和分散性随高熔指LDPE含量增加而增加,...研究了MI为20、40、80 g/10 min 3种LDPE对色母粒MI和流变性能的影响,分析了色母粒MI、流变性能与着色力、分散性的关系。结果表明:3种LDPE含量相同,其MI越高色母粒加工流动性能越好。色母粒着色力和分散性随高熔指LDPE含量增加而增加,然后下降。3种LDPE相比,MI为40 g/10 min的LDPE更适合,其制备的色母粒着色力和分散性最好。当其含量为42%时,色母粒着色力和分散性最好。展开更多
文摘The tinting phenomena of iron oxide contained glasses were studied from aspects of the electronic configuration, the iron ions coordination fields and the ions structure in glass. Several iron ion tinting forms at different redox or COD (chemical oxygen demand) conditions and their influential factors were given necessary explanations. The results reveal that the Fe^(3+)-O-Fe^(2+) structure is the real tinting reason of iron involved glasses, whereas the Si^(4+)-O-Fe^(3+) and Si^(4+)-O-Fe^(2+) formulations modify the glass colours. Under oxidizing melting condition, the amount of 4/6-coordinated Fe^(3+) increases and makes the glass colour yellowish. Conversely, reducing melting condition makes the 6-coordinated Fe^(2+) increased and gives much blue tint to the glass. The conventional tank furnace melting the very strong reducing condition, which is of high COD glass batch, is not suitable. The high ratio of ferrous/ferric in glass can be obtained with a new refining technology which contains no or little amount of refining agent.
