碳/氮化钛粉体制备技术  

Titanium Carbide/Nitride Powder Preparation Technology

作　　者：向茂乔 丁雯珺 朱庆山[1,2,3] XIANG Maoqiao;DING Wenjun;ZHU Qingshan(Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Engineering,University of the Chinese Academy of Sciences,Beijing 100049,China;Innovation Academy for Green Manufacture,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院过程工程研究所,北京100190 [2]中国科学院大学化学工程学院,北京100049 [3]中国科学院绿色过程制造创新研究院,北京100190

出　　处：《华东理工大学学报（自然科学版）》2024年第6期787-794,共8页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(22178348);中国科学院基础前沿科学研究项目(ZDBS-LY-JSC041)。

摘　　要：碳/氮化钛(TiC/N)兼具了金属和陶瓷特性,在机加工、电子和催化等领域引起了广泛关注。高质量TiC/N粉体对于制备高性能材料至关重要,但现有合成体系存在传质屏障与高反应能垒等问题,制备高质量TiC/N粉体面临较大挑战。本文系统分析了不同方法制备高质量TiC/N粉体的难点,并从强化传质和反应等方面介绍了最新进展,同时展望了TiC/N粉体的发展趋势。Titanium carbide(TiC)and titanium nitride(TiN)exhibit a unique combination of metallic and ceramic properties,showing excellent physicochemical performance.This has garnered significant attention in various fields,including machining,electronic information,and catalysis.High-quality titanium carbide/nitride(TiC/N)powders are essential for the preparation of high-performance materials,typically requiring near-stoichiometric compositions,fine particle sizes with narrow size distributions,low oxygen impurity content,and high purity.However,the current synthesis systems face insurmountable mass transfer barriers and have a high nucleation barrier,making the production of high-quality TiC/N powders quite challenging.The main challenge in synthesizing high-quality powders via TiO2 based solid-state reactions lies in the easy solubility of oxygen in TiC/N,along with the numerous side reactions occurring during the synthesis process.For the method involving the carbothermal and nitridation of titanium powder,the greatest difficulty arises from the formation of TiC or TiN on the surface of the titanium powder,which creates an insurmountable mass transfer barrier and releases significant heat,leading to a low stoichiometric ratio and large particle size.For the chemical vapor synthesis,the key issue is the high energy barrier for homogeneous nucleation and the complexity of the reaction pathways.Herein,we present the status of TiC and TiN powders preparation technologies and corresponding powder quality.The recent advancements in addressing above challenges by enhancing mass,improving heat transfer,and optimizing reaction pathways are discussed.The synthesis of single crystal powders,the increase of specific surface area,and the selective exposure of crystal facets are crucial research topics and important development directions for TiC/N powders in the future.

关 键 词：碳化钛 氮化钛 粉体合成 反应工程 过程强化 

分 类 号：TQ134[化学工程—无机化工]