在MgO-NiO固体溶液系统中,晶格变化是度和颗粒大小的函数
Chen Barad1, Giora Kimmel2, Agnieszka Opalińska3
1NRCN, P.O. Box 9001, Beer-Sheva, 84190, Israel.
Heliyon
|May 28, 2024
概括
晶体大小显著影响Mg1-xNixO晶格参数. 纳米晶体材料由于表面应力和弱化的离子结合而表现出严重的晶格扩张,为固体溶液的行为提供了洞察力.
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:
- 了解晶体大小和材料特性之间的关系对于开发先进材料至关重要.
- 由于其潜在的应用,Mg1-xNixO固体溶液系统引起了人们的兴趣,但其在纳米尺度上的结构性行为尚未完全理解.
研究的目的:
- 为了研究晶粒大小对Mg1-xNixO固体溶液的晶格参数和晶体结构的影响.
- 分析合成方法和化温度对粒径和随后的晶格变化的影响.
- 阐明纳米晶体材料中表面应力和离子键之间的相互作用.
主要方法:
- 合成Mg1-xNixO固体溶液使用sol-gel和微波热水法.
- 在673K至1473K的温度下进行化,以控制颗粒大小.
- 使用X射线衍射 (XRD) 进行格子参数和颗粒大小分析的表征.
- 扫描电子显微镜 (SEM) 用于形态观测.
主要成果:
- 通过变化化温度,可以实现从纳米到微米的各种粒度.
- 在所有度中观察到与颗粒大小的晶格参数的非单调变化.
- 纳米晶体Mg1-xNixO显示出显著的晶格扩张,而较大的颗粒显示出收缩.
结论:
- 晶粒大小是影响Mg1-xNixO固体溶液晶格参数的关键因素.
- 纳米晶体颗粒中的表面应力和弱化的离子结合是驱动格子扩张的关键机制.
- 这项研究提供了对MgO-NiO系统中晶格变化的全面理解,作为度和粒度大小的函数.
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