Synthesis of ZrB 2 powders by carbothermal and borothermal reduction

Eun Young Jung, Jung Hun Kim, Se Hyuk Jung, Sung Churl Choi

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Zirconium diboride (ZrB 2) powders were synthesized using ZrO 2 + B 2O 3 + C (carbothermal reduction), ZrO 2 + B 4C (boron carbide reduction), and ZrO 2 + B 4C + C (combined reduction) with various compositions at 1250 °C for 1-3 h under flowing argon. ZrB 2 powders synthesized using ZrO 2 + B 2O 3 + C displayed rod shape growth. There was much residual impurity carbon in ZrB 2 powders synthesized using ZrO 2 + B 4C + C. When synthesized using ZrO 2 + B 4C, there were the residual impurity B 2O 3 and little rod shape growth. Residual B 2O 3 impurities were easily removed by washing with methanol. We concluded that the ZrB 2 powder synthesis method using boron carbide reduction is the most desirable way to produce ZrB 2 powders among the three synthesis routes. ZrB 2 powders synthesized using ZrO 2 + B 4C have a particle size of 1.1 μm and a hexagonal shape, and low oxygen content (0.725 wt.%).

Original languageEnglish
Pages (from-to)164-168
Number of pages5
JournalJournal of Alloys and Compounds
Volume538
DOIs
StatePublished - 2012 Oct 15

Keywords

  • Boron carbide
  • Boron carbide reduction
  • Carbothermal reduction
  • Synthesis
  • Zirconium diboride

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