Formation Modes and Nucleation Stage Structural Investigations of Oxynitride Glass-Ceramic Systems

本研究是对成核过程的结构研究 多阴离子氧氮化物玻璃陶瓷材料中的阶段，例如 钡-铝-硅氮氧化物，或镁-铝- 氮氧化硅。 这项研究将确定，使用魔角 样品自旋核磁共振， 局部微观结构单元的成核现象。 眼镜 通过常规的熔融或溶胶-凝胶技术处理将 进行化学分析，热稳定性和微观结构 将被确定。 X射线差热分析 衍射，小角x射线散射，核磁共振 共振和电子显微镜将用于表征 标本。 这项研究将提供所需的知识基础， 制造新的玻璃和玻璃陶瓷材料， 属性的组合。

This research is structural investigation of the nucleation stage in multianion oxynitride glass ceramic materials, e.g. barium-aluminum-silicon oxynitrides, or magnesium-aluminum- silicon oxynitrides. The study will determine, using magic angle sample spinning nuclear magnetic resonance, the relationship of local microstructural units to nucleation phenomena. Glasses processed by conventional melting or by sol-gel techniques will be chemically analyzed, and thermal stability and microstructure will be determined. Differential thermal analysis, x-ray diffraction, small angle x-ray scattering, nuclear magnetic resonance, and electron microscopy will be used to characterize the specimens. The research will provide the knowledge base needed to fabricate new glass and glass ceramic materials having novel combinations of properties.