US EPA

1448459 

Journal Article 

Synthesis of ZrB2 powders by carbothermal and borothermal reduction 

Jung, EunY; Kim, JHun; Jung, SeH; Choi, SC 

2012 

Yes 

Journal of Alloys and Compounds
ISSN: 0925-8388 

538 

164-168 

10.1016/j.jallcom.2012.05.076 

WOS:000306813700028 

Zirconium diboride (ZrB2) powders were synthesized using
ZrO2 + B2O3 + C (carbothermal reduction), ZrO2 + B4C (boron carbide reduction), and ZrO2 + B4C +
C (combined reduction) with various compositions at 1250 degrees C for 1-3 h under flowing argon.
ZrB2 powders synthesized using ZrO2 + B2O3 + C displayed rod shape growth. There was much
residual impurity carbon in ZrB2 powders synthesized using ZrO2 + B4C + C. When synthesized using
ZrO2 + B4C, there were the residual impurity B2O3 and little rod shape growth. Residual B2O3
impurities were easily removed by washing with methanol. We concluded that the ZrB2 powder
synthesis method using boron carbide reduction is the most desirable way to produce ZrB2 powders
among the three synthesis routes. ZrB2 powders synthesized using ZrO2 + B4C have a particle size
of 1.1 mu m and a hexagonal shape, and low oxygen content (0.725 wt.%). (C) 2012 Elsevier B.V.
All rights reserved. 

Zirconium diboride; Synthesis; Boron carbide; Carbothermal reduction; Boron carbide reduction