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Preparation method of rock salt type high-entropy carbide ceramic with non-equimolar cation and anion carbon vacancies
The invention discloses a rock salt type high-entropy carbide ceramic with non-equimolar cation and anion carbon vacancies, which not only successfully introduces anion carbon vacancy defects, but also expands and complicates the selection range and variety of cation components, and breaks the rule of equimolar cation composition. And finally, preparing the high-entropy carbide ceramic with the single-phase rock salt crystal structure, which has high uniformity from microcosmic scale to nanoscale, by adopting a rapid hot pressing furnace through a solid-phase reaction method. According to analysis of research results of XRD, SEM and TEM, a related crystal structure is verified to be a stable phase. The method has important significance on regulating and controlling the structure and the performance of the material, and a new strategy is provided for realizing the synthesis of the high-performance high-entropy ceramic material. Meanwhile, the preparation method also has the characteristics of easiness in controlling the carbon vacancy content, simplification of the process, avoidance of impurity introduction, low cost, short preparation period and the like.
本发明公开了一种具有非等摩尔阳离子和阴离子碳空位的岩盐型高熵碳化物陶瓷，不仅成功引入阴离子碳空位缺陷，还扩大且复杂化阳离子组元选择范围和种类，打破等摩尔阳离子组成的规律。最终通过固相反应法，采用快速热压炉制备出从微观到纳米尺度均具有高度的均匀性的单相岩盐晶体结构高熵碳化物陶瓷。根据XRD和SEM以及TEM的研究结果分析，验证了相关的晶体结构是稳定相。对调控材料的结构与性能有重要意义，为实现高性能的高熵陶瓷材料的合成提供了一种新的策略。同时，该制备方法还具有易于控制碳空位含量、简化工艺避免杂质引入、成本低、制备周期短等特点。
Preparation method of rock salt type high-entropy carbide ceramic with non-equimolar cation and anion carbon vacancies
The invention discloses a rock salt type high-entropy carbide ceramic with non-equimolar cation and anion carbon vacancies, which not only successfully introduces anion carbon vacancy defects, but also expands and complicates the selection range and variety of cation components, and breaks the rule of equimolar cation composition. And finally, preparing the high-entropy carbide ceramic with the single-phase rock salt crystal structure, which has high uniformity from microcosmic scale to nanoscale, by adopting a rapid hot pressing furnace through a solid-phase reaction method. According to analysis of research results of XRD, SEM and TEM, a related crystal structure is verified to be a stable phase. The method has important significance on regulating and controlling the structure and the performance of the material, and a new strategy is provided for realizing the synthesis of the high-performance high-entropy ceramic material. Meanwhile, the preparation method also has the characteristics of easiness in controlling the carbon vacancy content, simplification of the process, avoidance of impurity introduction, low cost, short preparation period and the like.
本发明公开了一种具有非等摩尔阳离子和阴离子碳空位的岩盐型高熵碳化物陶瓷，不仅成功引入阴离子碳空位缺陷，还扩大且复杂化阳离子组元选择范围和种类，打破等摩尔阳离子组成的规律。最终通过固相反应法，采用快速热压炉制备出从微观到纳米尺度均具有高度的均匀性的单相岩盐晶体结构高熵碳化物陶瓷。根据XRD和SEM以及TEM的研究结果分析，验证了相关的晶体结构是稳定相。对调控材料的结构与性能有重要意义，为实现高性能的高熵陶瓷材料的合成提供了一种新的策略。同时，该制备方法还具有易于控制碳空位含量、简化工艺避免杂质引入、成本低、制备周期短等特点。
Preparation method of rock salt type high-entropy carbide ceramic with non-equimolar cation and anion carbon vacancies
一种具有非等摩尔阳离子和阴离子碳空位的岩盐型高熵碳化物陶瓷的制备方法
WANG YUNPING (Autor:in) / DONG CHUANG (Autor:in) / LIU SHIMIN (Autor:in)
05.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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