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无形二氧化的性化衍生的拓结构

Hirokazu Masai¹, Shinji Kohara², Toru Wakihara³

¹Department of Materials and Chemistry, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan. hirokazu.masai@aist.go.jp.

Communications chemistry

|December 9, 2023

概括

来自石的密集无形 (SiO2) 与玻璃状不同,显示出永久的结构变化. 这种永久的密集化允许通过控制初始晶体结构来设计新的无形材料.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
纳米技术纳米技术

背景情况:

压缩等机械力可以改变无形材料的拓,导致密集.
加密玻璃 (GS) 通常在回火后恢复到原来的状态.
了解无形中的拓变化对于开发先进材料至关重要.

研究的目的:

通过冷压缩研究从化 (SZ) 合成的无形二氧化 (SiO2) 的永久密集.
为了比较密集的SZ衍生的无形SiO2与密集的GS的拓稳定性.
探索基于晶体前体的功能无形材料设计的潜力.

主要方法:

压缩冷的化 (SZ) 形成密集的无形.
玻璃性二氧化 (GS) 的冷压缩用于比较分析.
用X射线衍射 (XRD) 分析结构性质.
密度测量. 密度测量. 密度测量.
热,以评估拓稳定性.

主要成果:

来自SZ的密集无形SiO2表现出永久密集,与密集的GS不同.
密集的SZ衍生的无形SiO2的XRD数据和密度与密集的GS相同.
密集的SZ衍生的无形SiO2的拓保留了晶体SZ的结构.
密集的GS在热化后放松到原始状态.
来自SZ的密集无形SiO2显示出更大的拓稳定性.

结论:

无形的永久密集化是可以通过使用地石前体来实现的.
晶体前体的拓记忆会影响得到的无形材料的稳定性.
这种方法为通过控制初始晶体拓来设计具有量身定制性能的功能无形材料提供了一条新的途径.

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