晶体结构溶液和高温热膨胀在NaZr2(PO4) 3类型材料中
Benjamin S Hulbert1, Julia E Brodecki1, Waltraud M Kriven1
1Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St, Urbana, Illinois 61801, USA.
概括
这项研究合成了具有可调节热膨胀的新型酸材料. 这些材料具有低热膨胀,高达1500°C,因此适用于高温应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 纳兹r2P3O12家族以低和可循环的热膨胀而闻名.
- 了解热膨胀机制对于高温材料应用至关重要.
研究的目的:
- 为了合成和表征SrZr4P6O24,CaZr4P6O24,MgZr4P6O24,NaTi2P3O12,NaZr2P3O12以及相关的固体溶液.
- 为了测量它们的热膨胀特性,高达1500°C.
- 研究这些材料在高温下结构变化和热膨胀机制.
主要方法:
- 有机-无机的固体捕获方法用于合成.
- 在现场高温X射线衍射 (HT-XRD) 从25到1500°C.
- 里埃差异映射和瑞特维尔德精细化用于晶体结构分析.
主要成果:
- SrZr4P6O24和CaZr4P6O24显示了平均线性热膨胀在-1 x 10^-6 /°C和6 x 10^-6 /°C之间.
- 与R3c对称的CaZr4P6O24和SrZr4P6O24的高温多态体在~1250°C以上被确定.
- 测量了所有高达1500°C的合成成分的热膨胀系数.
结论:
- 合成的酸材料具有较低和可适应的热膨胀性能.
- 高温多态体表现出不同的结构特征,影响热膨胀.
- 这项研究为先进的应用提供了对这些材料的热行为有价值的见解.
关键词:
在CaZr4(PO4)6里埃差异地图 里埃差异地图这是NZP类型的材料.SrZr4(PO4)66) 的一个地方.阶段转换的相位转换.粉末衍射衍射的方法结构解决方案结构解决方案热膨胀 热膨胀 热膨胀更多相关视频
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