Additive-assisted synthesis of boride, carbide, and nitride micro/nanocrystals

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.05.032· OSTI ID:22149852

Chen, Bo ^[1]; Yang, Lishan ^[2]; Heng, Hua; Chen, Jingzhong; Zhang, Linfei; Xu, Liqiang ^[1]; Qian, Yitai ^[1]; Yang, Jian ^[1]

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1. Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, and Department of Chemistry, Shandong University, Jinan 250100 (China)
2. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Shandong University), Ministry of Education, and School of Materials Science and Engineering, Shandong University, Jinan 250061 (China)

General and simple methods for the syntheses of borides, carbides and nitrides are highly desirable, since those materials have unique physical properties and promising applications. Here, a series of boride (TiB{sub 2}, ZrB{sub 2}, NbB{sub 2}, CeB{sub 6}, PrB{sub 6}, SmB{sub 6}, EuB{sub 6}, LaB{sub 6}), carbide (SiC, TiC, NbC, WC) and nitride (TiN, BN, AlN, MgSiN{sub 2}, VN) micro/nanocrystals were prepared from related oxides and amorphous boron/active carbon/NaN{sub 3} with the assistance of metallic Na and elemental S. In-situ temperature monitoring showed that the reaction temperature could increase quickly to {approx}850 Degree-Sign C, once the autoclave was heated to 100 Degree-Sign C. Such a rapid temperature increase was attributed to the intense exothermic reaction between Na and S, which assisted the formation of borides, carbides and nitrides. The as-obtained products were characterized by XRD, SEM, TEM, and HRTEM techniques. Results in this report will greatly benefit the future extension of this approach to other compounds. - Graphical abstract: An additive-assisted approach is successfully developed for the syntheses of borides, carbides and nitrides micro/nanocrystals with the assistance of the exothermic reaction between Na and S. Highlights: Black-Right-Pointing-Pointer An additive-assisted synthesis strategy is developed for a number of borides, carbides and nitrides. Black-Right-Pointing-Pointer The reaction mechanism is demonstrated by the case of SiC nanowires. Black-Right-Pointing-Pointer The formation of SiC nanowires is initiated by the exothermic reaction of Na and S.

• OSTI ID: 22149852
• Journal Information: Journal of Solid State Chemistry, Vol. 194; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM NITRIDES
BORON NITRIDES
CERIUM BORIDES
EUROPIUM BORIDES
LANTHANUM BORIDES
NIOBIUM BORIDES
NIOBIUM CARBIDES
PRASEODYMIUM BORIDES
REACTION KINETICS
SAMARIUM BORIDES
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
SYNTHESIS
TEMPERATURE MONITORING
TITANIUM CARBIDES
TRANSMISSION ELECTRON MICROSCOPY
TUNGSTEN CARBIDES
X-RAY DIFFRACTION
ZIRCONIUM BORIDES