期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 100, 期 12, 页码 5358-5362出版社
WILEY
DOI: 10.1111/jace.15106
关键词
borides; powders; synthesis; tantalum/tantalum compounds; ultra-high temperature ceramics
资金
- National Natural Science Foundation of China [51602342]
- bilateral project of NSFC-STINT [51611130064]
- Fundamental Research Funds for the Central Universities [2017QNA03]
- Program for Innovation Research Team of China University of Mining and Technology [2015QN004]
- QingLan Project of Jiangsu Province
Ultra-fine TaB2 powders were synthesized by a liquid phase method using tantalum ethoxide, boric acid and sucrose as the sources of tantalum, boron, and carbon. The TaB2 precursor powders is a Ta-B-C-O network system, which were heat-treated at lower temperature (1500 degrees C) in normal argon atmosphere to obtain the TaB2 powders. XRD confirms the presence of only hexagonal TaB2, while EDS and XPS spectrums confirm the composition and element chemical states of TaB2. The TEM images show a platelet shape of the TaB2 powder and the monocrystal SAED pattern confirms the presence of hexagonal TaB2. Particle size distribution curves show that particle size of the TaB2 powders distributes in the range of 30-160 nm, whose mean particle size is 106 nm.
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