The Preparation and Surface Characterization of Zirconia Polymorphs

Kyeong Taek Jung, Yong-Gun Shul, Alex T. Bell

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Zirconium hydroxides were obtained by precipitation of zirconium chloride with aqueous ammonia at constant pH followed by hydrothermal treatment The effect of thermal activation of the zirconium hydroxide on physical properties, and the effect of crystalline phase on the surface properties of zirconia were studied. The pressure during the hydrothermal treatment of zirconium hydroxide affected the surface area, particle growth, and phase transformation of the zirconia product Hydrothermally treated zirconia under atmospheric pressure (LP) shows higher surface area than that under high pressure (HP) and untreated (UT). HP zirconia shows a mixture of tetragonal and monoclinic phase after hydrothermal treatment due to the higher solubility and reprecipitation rate, whereas LP sample shows a tetragonal crystal structure from 600 to 1,050°C. Monoclinic phase zirconia shows greater CO2 and NH3 surface adsorption than amorphous and tetragonal phase zirconia. This suggests that the crystal structure of zirconia strongly affects the amount and strength of the surface adsorption site.

Original languageEnglish
Pages (from-to)992-999
Number of pages8
JournalKorean Journal of Chemical Engineering
Volume18
Issue number6
DOIs
Publication statusPublished - 2001 Jan 1

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this