从崩的性焦岩石,化-1-F中获得的拓上有序的无形:迈向"完美"玻璃的一步
Julien Haines1, Claire Levelut, Aude Isambert
1Institut Charles Gerhardt Montpellier, Equipe PMOF, UMR 5253 CNRS-UM2-ENSCM-UM1, Universite Montpellier II, Sciences et Techniques du Languedoc, Place E. Bataillon cc1504, 34095 Montpellier Cedex 05, France. jhaines@lpmc.univ-montp2.fr
Journal of the American Chemical Society
|August 27, 2009
概括
研究人员创造了一种新的无形,具有独特的结构,与传统玻璃不同. 这种新材料由化石-1-F焦化石衍生,具有独特的特性和在冲击波吸收方面的潜在应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 矿物物理 矿物物理
背景情况:
- 焦岩石是具有多种应用的晶体微孔固体.
- 高压合成可以从晶体前体产生新型无形材料.
- 了解无形结构对于材料开发至关重要.
研究的目的:
- 为了合成和表征一种新型的密度高的无形二氧化,从二氧化-1-F二氧化中制成.
- 为了研究这种新的无形和传统的玻璃之间的结构差异.
- 探索这种材料在冲击波吸收等应用中的潜力.
主要方法:
- 从化石-1-F中高压合成无形二氧化.
- 收集和分析总的X射线散射数据.
- 反向蒙特卡洛 (RMC) 建模以确定原子结构.
- 拉曼光谱检测不同长度尺度的结构变化.
主要成果:
- 在高压下成功制备了一种密集无形的二氧化 (SiO(2) 形式.
- RMC建模揭示了一种与玻璃性不同的结构,保留了热带石框架拓.
- 由于几何扭曲,无形在多个长度尺度上表现出无形化.
- 与标准玻璃相比,该材料显示出较低的和独特的特性,接近"有序"的玻璃状态.
结论:
- 一种新的拓上有序的无形材料已经合成出来,与玻璃不同.
- 这种无形二氧化具有独特的中等范围结构和特性,具有用于冲击波吸收应用的潜力.
- 这种合成方法适用于更复杂的酸地石,保留它们的框架拓和化学顺序.
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