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Sol-Gel Processing and Structure Development of Lead Titanate Particles

  • John S. Wright (a1) and Lorraine Falter Francis (a1)

Abstract

Spherical particles of lead titanate, PbTiO3, (PT) were prepared from partially hydrolyzed alkoxide solutions modified with benzoic acid. Modified and aged alkoxide solutions were added dropwise to isopropyl alcohol, forming particles (0.2 to 1.0 μm in diameter). FTIR spectroscopy results demonstrate chelation of the PT alkoxide which prevented the formation of an extended gel network. Diffuse reflectance FTIR (DRIFT) spectra indicate the benzoate ligands are present until 450°C; TGA results show significant weight loss at 450°C. PT particles crystallize into the perovskite phase at =450°C, as determined by DTA and XRD. The relatively low crystallization temperature may be due to the effect of benzoate ligands on amorphous structure and presence of internal surfaces.

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