Title :
Dielectric properties of ultrafine grained BaTiO/sub 3/
Author :
Shaikh, Aziz S. ; Vest, Robert W. ; Vest, Geraldine M.
Author_Institution :
Ferro Corp., Santa Barbara, CA, USA
fDate :
7/1/1989 12:00:00 AM
Abstract :
The dielectric constant and spontaneous polarization of fine-grained BaTiO/sub 3/ prepared from powder produced by metalloorganic decomposition technology were studied. The room-temperature dielectric constant of BaTiO/sub 3/ was found to increase sharply with increase in grain size, reach a maximum at about 0.4 mu m, and decrease with further increase in grain size. Spontaneous polarization continuously decreased with decrease in grain size. A model is proposed to explain the grain size dependence of the dielectric constant.<>
Keywords :
barium compounds; dielectric polarisation; dielectric properties of solids; ferroelectric materials; grain size; permittivity; dielectric constant; grain size; metalloorganic decomposition technology; spontaneous polarization; ultrafine grained BaTiO/sub 3/; Barium; Dielectric constant; Dielectric measurements; Grain size; Polarization; Powders; Temperature; Titanium compounds; Ultrasonic variables measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
