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Silicate Glasses with Unprecedented High Nitrogen and Electropositive Metal Contents Obtained by Using Metals as Precursors

机译:以金属为前驱体获得前所未有的高氮和正电金属含量的硅酸盐玻璃

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摘要

A novel glass-synthesis route involving the reaction of electropositive elements in their metallic state with Si3N4 and SiO2 in N2 atmosphere is presented. New silicate glass compositions have been obtained in this way with nitrogen contents higher than 70 e/o (N content in equivalents; e = [N]/ 3[N] + 2[O], where [N] and [O] are the atomic concentrations of N and O, respectively), compared to previously reported oxynitride. glasses typically that have concentrations below 30 e/o.'1"8' The new glasses constitute a significant extension of silicate glass compositions and also show high chemical flexibility. Samples have been prepared with high concentrations of alkaline-earth and rare-earth elements such as Ca, Sr, Ba, La, Pr, and Sm (higher than 50 % cations; hereafter cation %). The glasses can easily be obtained in macroscopic quantities. They demonstrate high refractive indices, up to 2.30, and Vickers hardness values up to 13.3 GPa, which are the highest values reported for any silicate glass.
机译:提出了一种新颖的玻璃合成路线,涉及处于金属态的电正性元素与N2气氛中的Si3N4和SiO2反应。以这种方式获得了新的硅酸盐玻璃组合物,其氮含量高于70 e / o(N含量当量; e = [N] / 3 [N] + 2 [O],其中[N]和[O]为N和O的原子浓度),与以前报道的氮氧化物相比。浓度通常低于30 e / o的玻璃'1” 8”这种新型玻璃构成了硅酸盐玻璃成分的显着扩展,并且显示出很高的化学柔韧性,并制备了高浓度碱土和稀土元素的样品例如Ca,Sr,Ba,La,Pr和Sm(高于50%阳离子;以下为阳离子%),可以很容易地获得大量的玻璃,它们的折射率高,最高可达2.30,并且具有维氏硬度值高达13.3 GPa,这是所有硅酸盐玻璃的最高记录值。

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  • 来源
    《Advanced Materials》 |2005年第18期|p. 2214-2216|共3页
  • 作者单位

    Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden;

    Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden;

    Department of Physical Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden;

    Department of Physical Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden;

    Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden;

    Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden;

    Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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