在trifenylsilanol晶体中异常的闪光冷却诱导阶段
1Institute of Experimental Physics, University of Wrocław, M. Borna 9, Wrocław, 50-204, Poland.
概括
快速冷却的三基醇晶体诱导了一个新的有序阶段 (第二阶段). 这种可逆转换发生得很快,与缓慢冷却方法不同,这种方法产生了无序的I阶段.
科学领域:
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
- 材料科学 是一种材料科学.
背景情况:
- 三四醇 (Ph3SiOH) 呈现复杂的相位行为.
- 了解相位过渡对于材料开发至关重要.
研究的目的:
- 为了研究三西醇在快速冷却后的相位行为.
- 为了描述新观察到的有序阶段.
主要方法:
- 晶体学 晶体学是指结晶学.
- 可变温度研究 (冷却和加热周期).
主要成果:
- 在100K的快速冷却后,在triphenylsilanol晶体中观察到一种独特,稳定,有序的II阶段.
- 与无序的I阶段相比,II阶段表现出单元细胞参数的增加.
- 从第二阶段回到第一阶段的过渡在加热后可逆地发生在150K左右.
- 这种转换可以在多个冷却/加热周期中重复,而不会导致晶体损坏.
结论:
- 三四醇经历了一个可逆的,温度诱导的相位过渡.
- 快速冷却是进入第II阶段的关键.
- 该材料表现出稳定性和可逆性,表明在响应性材料中的潜在应用.
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