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首页> 外文学位 >The effects of temperature and composition on the solubility of chromium in multi-component alkali-borosilicate glass melts.
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The effects of temperature and composition on the solubility of chromium in multi-component alkali-borosilicate glass melts.

机译：温度和组成对铬在多组分碱金属硼硅酸盐玻璃熔体中溶解度的影响。

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摘要

The solubility of Cr in waste glass melts has an enormous impact on the cost and schedule of waste vitrification in the U.S. The solubility of Cr was studied in the context of liquidus temperature (TL) in this study, which required development of new, more accurate, experimental methods.; It was hypothesized that the solubility of Cr in glass melts was influenced by its ability to achieve an acceptable oxygen coordination environment within the cages of the network structure. The flexibility of these network cages to accommodate Cr is related to the concentrations and potentials of other ions in the melt. This led to the development of a model that relates the ion potential (IP) of melt components to TL.; The IP model was found to accurately predict the TL of glasses in the spinel ([Fe,Ni,Mn][Fe,Cr,Mn]2O4) primary phase field. The model was rigorously validated and compared to other existing models. For the fundamental assumptions of the model to be valid, it must also be capable of predicting the effects of composition on TL of alkali-borosilicate glasses in other primary phase fields. The model was applied to simulated waste glass melts in the zircon (ZrSiO4) primary phase field with equal success.; The impacts of this study include a better understanding of the fundamental processes that affect the solubility of components in multi-component alkali-borosilicate melts. This model can be directly applied to predict TL of waste glass melts in the two most important primary phase fields and with further development can be applied to prediction of TL of other multi-component silicate glass melts covering a variety of primary phase fields.
机译：Cr在美国废玻璃熔体中的溶解度对废物玻璃化的成本和时间表产生了巨大影响。本研究在液相线温度（T L ）的背景下研究了Cr的溶解度，需要开发新的，更准确的实验方法。据推测，Cr在玻璃熔体中的溶解度受其在网状结构笼内达到可接受的氧配位环境的能力影响。这些网状笼容纳Cr的灵活性与熔体中其他离子的浓度和电势有关。这导致了一个模型的建立，该模型将熔融组分的离子电势（IP）与T L 相关。发现IP模型可以准确预测尖晶石中玻璃的T L （[Fe，Ni，Mn] [Fe，Cr，Mn] 2 O 4 ）主相场。该模型经过严格验证，并与其他现有模型进行了比较。为了使模型的基本假设有效，它还必须能够预测其他初级相领域中成分对碱金属硼硅酸盐玻璃的T L 的影响。该模型被应用于模拟锆石（ZrSiO 4 ）主相场中的废玻璃熔体，取得了相同的成功。这项研究的影响包括对影响组分在多组分碱金属硼硅酸盐熔体中溶解度的基本过程有了更好的理解。该模型可直接用于预测两个最重要的初生相场中的废玻璃熔体的T L ，并且可以进一步开发用于预测其他玻璃熔体的T L 多组分硅酸盐玻璃熔体覆盖了各个主相领域。

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  • 作者

    Vienna, John David.;

  • 作者单位

    Washington State University.;

  • 授予单位 Washington State University.;
  • 学科 Engineering Materials Science.; Physics Condensed Matter.; Chemistry Inorganic.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 193 p.
  • 总页数 193
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;无机化学;
  • 关键词

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