Ferroelectric Properties of Lead Titanate |
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| Authors: | V. G. BHIDE M. S. HEGDE K. G. DESHMUKH |
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| Affiliation: | Physics Department, Institute of Science, Bombay-1, India, and Physics Department, Visvesvaraya Regional College of Engineering, Nagpur, India |
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| Abstract: | The eutectic and solidus temperatures of the PbTiO3-KF binary system were investigated by DTA for four compositions. Optical studies of crystal habit as a function of crystallization conditions were used to determine favorable conditions for growing PbTiO3 crystals from a KF flux. Results of X-ray studies of these crystals agree closely with those of earlier studies. Interferometric measurements of thermal expansion confirmed the ferroelectric transition at 490° C. Specific heat studies indicated a transition energy of about 1550 cal/mole with an entropy change of 2.055 cal/mole °C. Spontaneous polarization was calculated as 66 μcoulombs/cm2. |
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