Synthesis of ZrB2-SiC composite powders by sol-gel method using acetic acid as chemical modifier

Yun Zhang, Yue Zhang, Rui Xing Li, Shu Yin, Tsugio Sato, Jun Ping Li

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

ZrB2-SiC ceramics are known to have better performance than monolithic ZrB2. Therefore, the addition of SiC can improve the mechanical properties and sintering behavior of ZrB2. In the present work, ZrB2-SiC composite powders were synthesized by sol-gel method using zirconium n-propoxide (Zr(OPr)4), boric acid (H3BO3), sucrose (C12H22O11), TEOS, and acetic acid (AcOH). Clearly, it was a non-aqueous solution system at the very beginning of the reactions. Here, AcOH was used as both chemical modifier and solvent to control Zr(OPr)4 hydrolysis. Actually, AcOH could dominate the hydrolysis by self-produced water of the chemical propulsion, rather than the help of outer water. C12H22O11 was selected since it can be completely decomposed to carbon. Thus, carbon might be accounted precisely for the carbothermal reduction reaction. Moreover, the photomicrograph revealed a spherical morphology of ZrB2-SiC composite particles with an uniform size distribution.

Original languageEnglish
Pages (from-to)200-204
Number of pages5
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume46
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

  • Carbothermal reduction
  • Composite powder
  • Sol-gel
  • Synthesis
  • ZrB-SiC

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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