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Dielectric and pyroelectric properties in the La-doped 0.45Pb(Mg 1/3Ta2/3)O3-0.55PbZrO3 system

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2 Author(s)
Yeon Jung Kim ; Dept. of Phys., Dankook Univ., Chungnam, South Korea ; Seong Won Choi

Dielectric and pyroelectric properties of relaxor ferroelectric in the 0.45(Pb1-3x/2Lax)(Mg1/3Ta2/3 )O3-0.55PbZrO3 solid solution series have been investigated. The dielectric constant and loss of ceramic samples were determined. The pyroelectric coefficient and spontaneous polarization were measured by the static Byer-Roundy method as a function of temperature and for various compositions in the La-doped PMT-PZ system. The addition of La2O3 was less effective in grain growth and shifting of the Tc~12°C/mole% downward in PMT-PZ system. Dielectric and pyroelectric properties of this system were improved by adding a small amount of La2O3. Compositions near 0.45PMT-0.55 PZ-0.04La have been identified to have high pyroelectric figures of merit near room temperature

Published in:

Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on  (Volume:2 )

Date of Conference:

18-21 Aug 1996