Hostname: page-component-54dcc4c588-hp6zs Total loading time: 0 Render date: 2025-10-05T19:11:13.269Z Has data issue: false hasContentIssue false
  • English
  • Français

Mechanochemical Synthesis of ZrTiO4 Precursor fromInhomogeneous Mixed Gels

Published online by Cambridge University Press:  21 February 2011

Tetsuhiko isobe ,
Yutaka Okamoto  and
Mamoru Senna
Tetsuhiko isobe
Affiliation:
Faculty of Science and Technology, Keio university, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223,Japan
Yutaka Okamoto
Affiliation:
Faculty of Science and Technology, Keio university, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223,Japan
Mamoru Senna
Affiliation:
Faculty of Science and Technology, Keio university, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223,Japan
Get access

Abstract

Effects of vibration ball-milling of a powdered mixture of two gels,prepared from mixing ZrO2 andTiO2 sols, oncrystallization processes during heating are studied in order to elucidateenhanced mechanochemical reactions with the aid of hydroxyl groups. TiO2 (anatase) and ZrO2 (tetragonal) crystallizedat 698 K and 712 K, respectively, when heating non-milled gel mixture at 10K min1 in air. Few reactions between the two phases were detectedbelow 1023 K. After vibro-milling a powdered gel mixture at room temperaturefor 3 to 30 h, ZrTiO4 (orthorhombic) crystallized directly fromnon-crystalline precursors on heating to 1023 K. The fraction of crystallizedZrTi04, determined by Raman spectroscopy,increased linearly with increasing the index of micro-homogeneity fornon-heated gels. We suggest that short-range ordering of ZrTiO4rather than crystallization of individual oxides occurs through thenon-thermal atomic movement between different metallic species undermechanical stress.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 273
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

1 Senna, M., Solid State Ionics, 63–65, 3 (1993).Google Scholar
2 Komatsubara, S., Isobe, T. and Senna, M., J. Am. Ceram. Soc, 77, 278 (1994).Google Scholar
3 Isobe, T. and Senna, M., J. Solid State Chem., 93, 358 (1991); 93, 368 (1991).Google Scholar