TG-DTA and FT-IR Studies on Sol-Gel Derived Pb_1-xCa_xTiO₃

Crystallization of sol-gel derived Pb _1−x Ca _x TiO ₃ powders have been investigated using TG-DTA technique, X-ray diffraction and FT-IR spectroscopy. The thermograms obtained on as fired PbTiO ₃ powder showed a dominant exotherm at ∼450°C, and is well supported by X-ray diffraction indicating single-phase formation. With calcium doping the crystallization temperature is found to reduce. Although TG-DTA and XRD analysis indicated crystallization at low temperatures, but the FT-IR analysis revealed significant presence of organic phase, and suggests firing at a much higher temperature (> 550°C) to obtain a pure inorganic phase.

Keywords:

• Sol-gel
• lead calcium titanate
• FTIR
• DTA

Acknowledgments

The authors are thankful to Department of Science & Technology, Govt. of India for financial support.

Paper originally presented at AMF-4, Bangalore, India, December 12–15, 2003