对氧化碳化的合成和导电性的研究
Shaolong Li1,2,3, Fan Yang2, Peizhu Mao2
1State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, China.
Materials (Basel, Switzerland)
|October 16, 2025
概括
氧化碳化 (TiCxOγ) 是通过碳热还原合成的. 增加氧含量改变了谷物颜色,降低了晶格参数,同时提高了导电性和密度.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
背景情况:
- 氧化碳化 (TiCxOγ) 是一种具有可调节性质的有前途的材料.
- 了解组成和结构之间的关系对于材料设计至关重要.
研究的目的:
- 通过碳热还原合成TiCxOγ.
- 研究氧含量对TiCxOγ的结构性,形态性和电气性质的影响.
主要方法:
- 在气氛中通过烧结合成TiO2和石墨.
- 使用X射线衍射 (XRD),扫描电子显微镜 (SEM),能量分散式X射线光谱 (EDS) 和X射线光电子光谱 (XPS) 的表征.
- 使用通用结构分析系统软件 (GSAS-II) 进行结构改进.
- 包括电导率 (四探头方法) 和密度 (阿基米德法) 在内的属性测量.
主要成果:
- TiCxOγ 已成功合成,具有珊瑚状的微观结构和均的元素分布.
- 氧含量增加导致颜色从灰色变为红棕色,并减少了晶格参数.
- XPS证实了多个氧化状态的存在 (双价,三价,四价).
- 电导率和密度随着碳含量增加而增加.
结论:
- 合成方法是有效的生产TiCxOγ.
- 氧含量显著影响TiCxOγ的结构和物理性质.
- 观察到的性能趋势表明,在需要量身定制的导电性和密度的领域有潜在的应用.
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