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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structural studies on boroaluminosilicate glasses
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Structural studies on boroaluminosilicate glasses

机译：硼铝硅酸盐玻璃的结构研究

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Two series of boroalumino silicate glasses having varying mole ratios of B2O3/Na2O (series I) and B2O3/SiO2 (series II) were prepared by conventional melt-quench method. Based on Si-29 and B-11 MAS NMR studies, it has been established that for series I glasses up to 15 mol% B2O3 content, Na2O preferentially interacts with B2O3 structural units resulting in the conversion of BO3 to BO4 structural units. Above 15 mol% B2O3 for series I glasses and for all the investigated compositions of the series II glasses, silicon structural units are unaffected whereas boron exist in both trigonal and tetrahedral configurations. Variation of microhardness values of these glasses as a function of composition has been explained based on the change in the relative concentration of BO4 and BO3 structural units. These glasses in the powder form can act as efficient room temperature ion exchangers for metal ions like Cu2+. It is seen that the ion exchange does not affect the boron and silicon structural units as revealed by IR studies. (c) 2007 Published by Elsevier B.V.
机译：通过常规的熔融淬火方法制备了具有不同摩尔比的B 2 O 3 / Na 2 O（系列I）和B 2 O 3 / SiO 2（系列II）的两个系列的硼铝硅酸盐玻璃。基于Si-29和B-11 MAS NMR研究，已经确定，对于I系列玻璃，B2O3含量最高为15 mol％，Na2O优先与B2O3结构单元相互作用，从而导致BO3向BO4结构单元的转化。对于系列I玻璃和所有所研究的系列II玻璃，高于15mol％的B 2 O 3，硅结构单元不受影响，而硼以三角和四面体构型存在。基于BO4和BO3结构单元的相对浓度的变化，已经解释了这些玻璃的显微硬度值随组成的变化。这些粉末形式的玻璃可以用作金属离子（例如Cu2 +）的高效室温离子交换剂。可以看出，离子交换不影响硼和硅的结构单元，正如红外研究所揭示的那样。 （c）2007年由Elsevier B.V.

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