TITLE

Overpoling-induced property degradation in Pb(Mg1/3Nb2/3)O3–PbTiO3 single crystals of near-morphotropic phase boundary compositions

AUTHOR(S)
Shanthi, M.; Hoe, K. H.; Lim, C. Y. H.; Lim, L. C.
PUB. DATE
June 2005
SOURCE
Applied Physics Letters;6/27/2005, Vol. 86 Issue 26, p262908
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Overpoling phenomenon has been observed in flux-grown Pb(Mg1/3Nb2/3)O3–(31–32)%PbTiO3 single crystals when poled above 0.4 kV/mm at room temperature. This leads to increased property variations at intermediate poling fields (0.6–0.8 kV/mm) and to the degradation of piezoelectric properties at high poling fields (>=1.0 kV/mm). In comparison, both PMN–28%PT and PMN–30%PT crystal compositions are resistant to overpoling, of which PMN–30%PT exhibits superior dielectric and piezoelectric properties with KT≈7500–9000, d33≈2200–2500 pC/N, and d31≈1100–1400 pC/N. The electromechanical coupling factors (k33=0.90–0.94; k31=0.48–0.55, and kt=0.58–0.62) are relatively insensitive to the poling field and crystal composition.
ACCESSION #
17545039

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics