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Ferroelectric Properties of Lead Titanate
Author(s) -
BHIDE V. G.,
HEGDE M. S.,
DESHMUKH K. G.
Publication year - 1968
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1968.tb13323.x
Subject(s) - ferroelectricity , materials science , eutectic system , lead titanate , mineralogy , crystallization , polarization (electrochemistry) , thermal expansion , analytical chemistry (journal) , thermodynamics , crystallography , dielectric , chemistry , microstructure , metallurgy , optoelectronics , physics , chromatography
The eutectic and solidus temperatures of the PbTiO 3 ‐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 PbTiO 3 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/cm 2 .