Modified Pb(Mg1/3Nb2/3)O3-PbTiO3 Single Crystals for High Temperature Application

Author

Zhang, Shujun ; Luo, Jun ; Shanta, Rob ; Snyder, David W. ; Shrout, Thomas R.

Author_Institution

Pennsylvania State Univ., University Park

fYear

2006

fDate

July 30 2006-Aug. 3 2006

Firstpage

261

Lastpage

264

Abstract

The temperature usage range of rhombohedral Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ (PMNT) piezoelectric crystals is limited by the Curie temperature (T_C) and further limited by the strongly curved morphotropic phase boundary (MPB). It is found in PMNT crystals that T_C decreases or keeps constant at low dc bias and then increases with increasing field, while the ferroelectric-ferroelectric phase transition temperature (T_F-F) decreases with increasing dc bias, expanding the tetragonal region and decreasing the overall temperature usage range. Modifications to Bridgman grown PMNT crystals have been made based on a perovskite tolerance factor relationship in an attempt to increase T_F-F, and the usage temperature range.

Keywords

Curie temperature; crystal growth; ferroelectric transitions; lead compounds; magnesium compounds; niobium compounds; phase transformations; piezoelectric materials; titanium compounds; Bridgman grown; Curie temperature; PMNT crystals; PbTiO₃; crystal growth; ferroelectric-ferroelectric phase transition temperature; high temperature application; morphotropic phase boundary; perovskite tolerance factor relationship; rhombohedral piezoelectric crystals; single crystals; tetragonal region; Crystalline materials; Crystals; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Educational institutions; Frequency measurement; Permittivity measurement; Piezoelectric materials; Temperature distribution; Crystal growth; Dielectric; PMNT; Piezoelectric; dc bias;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of ferroelectrics, 2006. isaf '06. 15th ieee international symposium on the

Conference_Location

Sunset Beach, NC

ISSN

1099-4734

Print_ISBN

978-1-4244-1331-7

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2006.4387881

Filename

4387881