Journal of Materials Science

, Volume 29, Issue 24, pp 6533–6538 | Cite as

Zircon formation from amorphous spherical ZrSiO4 particles obtained by hydrolysis of aerosols

  • P. Tartaj
  • J. Sanz
  • C. J. Serna
  • M. Ocaña


A procedure for the preparation of SiO2·ZrO2 spherical particles, based on the hydrolysis of liquid aerosols is described. A mixture of tetraethylortho-silicate (TEOS) and zirconium n-propoxide with the proper stoichiometry (Zr/Si atomic ratio = 1) was used as a liquid precursor. The alkoxide mixture had to be partially hydrolysed before aerosol generation in order to obtain solids with a zircon composition. The as-prepared powders consisted of particles in the micrometre range with an amorphous character. Energy dispersive X-ray spectroscopy (EDX), infrared (i.r.) and nuclear magnetic resonance (NMR) analyses indicated the existence of a good compositional homogeneity and a large number of Si-O-Zr bonds in the sample. Calcination of the powder up to 950°C gave rise to the segregation of silica and the crystallization of tetragonal zirconia, which transformed into the monoclinic phase after heating at 1300°C. Crystallization of zircon started on calcination at 1450°C; it was accompanied by the formation of some cristobalite. The complete transformation of the sample into zircon took place after prolonged heating (20 h) at 1500°C.


Zircon Nuclear Magnetic Resonance Cristobalite ZrSiO4 Tetragonal Zirconia 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • P. Tartaj
    • 1
  • J. Sanz
    • 1
  • C. J. Serna
    • 1
  • M. Ocaña
    • 1
  1. 1.Instituto de Ciencia de MaterialesCSICMadridSpain

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