Carbothermal Reduction Synthesis of Zirconium Diboride Powders Assisted by Microwave

Abstract:

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ZrB2 powder has been prepared through carbothermal reduction boronization of zirconia/boron carbide/carbon mixtures heating assisted by microwave. The powder characteristics were investigated by X-ray diffraction (XRD), X-ray fluorescence (XRF), nitrogen absorption (BET model) and scanning electron microscope (SEM). The experiments indicated that excessive B4C is necessary and the carbothermic reaction reacts severely at a higher temperature and complete at 1600oC. The crystallite size has ranged from 50-100 nm, according to the calculated surface area. Highest purity of ZrB2 powder, which was synthesized at 1600oC, is 99.67 wt%. The surface area of ZrB2 powder synthesis at 1600oC is 18.33 m2/g. Vibration of temperature should affect the purity of ZrB2, as the sub reaction acted.

Info:

Periodical:

Advanced Materials Research (Volumes 105-106)

Edited by:

Wei Pan and Jianghong Gong

Pages:

203-206

DOI:

10.4028/www.scientific.net/AMR.105-106.203

Citation:

H. L. Wang et al., "Carbothermal Reduction Synthesis of Zirconium Diboride Powders Assisted by Microwave", Advanced Materials Research, Vols. 105-106, pp. 203-206, 2010

Online since:

April 2010

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Price:

$35.00

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