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The effect of composition on the viscosity, crystallization and dissolution of simple borate glasses and compositional design of borate based bioactive glasses.

机译：组成对简单硼酸盐玻璃的粘度，结晶和溶解的影响以及基于硼酸盐的生物活性玻璃的组成设计。

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摘要

Borate glasses have recently been developed for a variety of medical applications, but much less is known about their structures and properties than more common silicate glasses. Melt properties and crystallization tendency for compositions in the Na2O-CaO-B2O3 system were characterized using differential thermal analysis and viscosity measurements. Characteristic viscosity (isokom) temperatures varied with the ratio between the modifier content (Na2O+CaO) and B2O3, particularly at lower temperatures, consistent with the changes in the relative concentrations of tetrahedral borons in the glass structure.;Similar glasses were used to study dissolution processes in water. These alkali-alkaline earth glasses dissolve congruently and follow linear dissolution kinetics. The dissolution rates were dependent on the glass structure, with slower rates associated with greater fractions of four-coordinated boron. For glasses with a fixed alkaline earth identity, the dissolution rates increased in the order Li
机译：硼酸盐玻璃最近已被开发用于多种医学应用，但是与更常见的硅酸盐玻璃相比，人们对硼酸盐玻璃的结构和性能知之甚少。使用差示热分析和粘度测量来表征Na 2 O-CaO-B 2 O 3系统中组合物的熔体性质和结晶趋势。特性粘度（等温）温度随改性剂含量（Na2O + CaO）和B2O3之比的变化而变化，特别是在较低温度下，与玻璃结构中四面体硼相对浓度的变化相一致。在水中的溶解过程。这些碱-碱土玻璃完全溶解并遵循线性溶解动力学。溶解速度取决于玻璃结构，速度越慢，四配位硼的比例越高。对于具有固定的碱土金属身份的玻璃，溶解速率按Li

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  • 作者

    Goetschius, Kathryn Lynn.;

  • 作者单位

    Missouri University of Science and Technology.;

  • 授予单位 Missouri University of Science and Technology.;
  • 学科 Materials science.
  • 学位 Ph.D.
  • 年度 2014
  • 页码 179 p.
  • 总页数 179
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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