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Dispersant-assisted preparation of ultra-fine HfB2 powder

文献类型：期刊论文

作者Wang, Tianxu2,3; Wang, Zhen1,3; Hu, Chenguang1,3; Li, Xinyang1,3; Huang, Zhulin1,3; Hu, Xiaoye1,3; Li, Yue1,3
刊名APPLIED SURFACE SCIENCE
出版日期2022-12-30
卷号606
关键词HfB2 ceramic powder Co-precipitation Carbothermal reduction Dispersant
ISSN号0169-4332
DOI10.1016/j.apsusc.2022.154995
通讯作者Li, Xinyang(xyli@issp.ac.cn) ; Huang, Zhulin(zlhuang@issp.ac.cn) ; Hu, Xiaoye(hxy821982@issp.ac.cn)
英文摘要Hafnium boride (HfB2), as an ultra-high temperature ceramic, has been extensively employed in the aerospace field due to its high melting point and excellent ultrahigh-temperature oxidation resistance. Despite its outstanding performance, the development of the HfB2 for practical applications remained limited by its low -quality production including high oxygen content, large particle size and high agglomeration. In this work, a series of dispersants are adopted for reducing the particle size and suppressing the agglomeration of HfB2 powder during the liquid phase co-precipitation method combined with carbothermal reduction. Based on various characterizations, it is discovered that the presence of dispersants can greatly reduce the particle size and restrain the agglomeration of the HfB2. Specifically, the HfB2 prepared using polyethylene glycol (PEG) demonstrates an ultra-fine particle size down to hundreds of nanometers. To better understand the function of the dispersant, the formation of the HfB2 is unveiled via a combination of multiple characterizations. In detail, the dispersants can cap on the formed HfB2 and restrict their further growth and agglomeration during the reaction through the electrostatic repulsion and steric hindrance of high molecular polymer, thereby greatly improving the quality of HfB2 powder.
WOS关键词HIGH-TEMPERATURE ; FORMATION MECHANISM ; ZRB2 ; CERAMICS ; NANOPARTICLES ; ZIRCONIUM ; OXIDATION
资助项目Major science and technology project of Anhui Province ; Presidential Foundation of Hefei Institutes of Physical Science, CAS ; National Science Fund for Distinguished Young Scholars ; [008192841048] ; [BJPY2021B04] ; [YZJJ202202-CX] ; [51825103]
WOS研究方向Chemistry ; Materials Science ; Physics
语种英语
WOS记录号WOS:000874534900001
出版者ELSEVIER
资助机构Major science and technology project of Anhui Province ; Presidential Foundation of Hefei Institutes of Physical Science, CAS ; National Science Fund for Distinguished Young Scholars
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/130047]  
专题中国科学院合肥物质科学研究院
通讯作者Li, Xinyang; Huang, Zhulin; Hu, Xiaoye
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, HFIPS, Hefei 230031, Peoples R China
2.Anhui Univ, Hefei 230039, Peoples R China
3.Chinese Acad Sci, Key Lab Mat Phys, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Tianxu,Wang, Zhen,Hu, Chenguang,et al. Dispersant-assisted preparation of ultra-fine HfB2 powder[J]. APPLIED SURFACE SCIENCE,2022,606.
APA Wang, Tianxu.,Wang, Zhen.,Hu, Chenguang.,Li, Xinyang.,Huang, Zhulin.,...&Li, Yue.(2022).Dispersant-assisted preparation of ultra-fine HfB2 powder.APPLIED SURFACE SCIENCE,606.
MLA Wang, Tianxu,et al."Dispersant-assisted preparation of ultra-fine HfB2 powder".APPLIED SURFACE SCIENCE 606(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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