天津大学学报（英文版）
天津大學學報（英文版）
천진대학학보（영문판）
TRANSACTIONS OF TIANJIN UNIVERSITY
2015年
3期
228-233
,共6页
季惠明%范红娜%丰红军%孙晓红
季惠明%範紅娜%豐紅軍%孫曉紅
계혜명%범홍나%봉홍군%손효홍
zirconium diboride%boro/carbothermal reaction%kinetic model%sol-gel method
A single phase of zirconium diboride(ZrB2)powder was successfully synthesized by sol-gel method in Zr-B-C-O system, using zirconium oxychloride(ZrOCl2·8H2O), nano-scale boron and sucrose(C12H22O11)as the starting materials and propylene oxide(PO)as complexing agent at a low temperature. Simultaneously, the experimen-tal and theoretical studies of ZrB2 synthesized by boro/carbothermal reduction from novel sol-gel technology were discussed. The results indicated that the pure rod-like ZrB2 powder without residual ZrO2 phase could be obtained with a B/Zr molar ratio of 3.5 at 1 400℃in argon atmosphere. Besides, in this study, a kinetic model for the Zr-B-C-O sys-tem producing ZrB2 by boro/carbothermal reaction was established based on thermodynamic analysis. It was also ob-served that, with the increase of reaction temperature, the reaction which produced ZrB2 powders changed from the borothermal reaction to boro/carbothermal reaction in the Zr-B-C-O system.
