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Effect of Pb/Ti Ratio on the Particle Size of Hydrothermal PbTiO3 Powders

Published online by Cambridge University Press:  10 February 2011

C. R. Peterson  and
E. B. Slamovich
C. R. Peterson
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, IN 47907
E. B. Slamovich
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, IN 47907
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Abstract

The influence of Pb/Ti ratio on the particle size of hydrothermally derived lead titanate (PbTiO3) powders was investigated. Phase pure PbTiO3 powder was synthesized by reacting nanocrystalline TiC2 powder in a 1 m KOH solution for 15 h at 200°C with Pb/Ti ratios of 1 and 5. Faceted platelet particles with a low aspect ratio were formed in solutions with Pb/Ti ratios of 1 and 5. The observed particle size of PbTiO3 was 200 nm and larger when Pb/Ti = 1, while 50 - 100 nm sized particles formed when Pb/Ti = 5. In support of TEM observations, the BET specific surface area data increased from 4.4 m2/g to 7.3 m2/g as the Pb/Ti ratio was increased from I to 5. PbTiO3 particle size was controlled by either inhibiting or promoting dissolution-precipitation. Dissolution-precipitation in a high pH solution was inhibited by maintaining an excess of Pb ions in solution and it was promoted when input concentrations of Pb and Ti were equivalent.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 520: Symposium P – Nanostructured Powders & Their Industrial Application , 1998 , 83
Copyright
Copyright © Materials Research Society 1998

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References

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