Title :
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
fDate :
July 30 2006-Aug. 3 2006
Abstract :
The temperature usage range of rhombohedral Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMNT) piezoelectric crystals is limited by the Curie temperature (TC) and further limited by the strongly curved morphotropic phase boundary (MPB). It is found in PMNT crystals that TC decreases or keeps constant at low dc bias and then increases with increasing field, while the ferroelectric-ferroelectric phase transition temperature (TF-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 TF-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;
Conference_Titel :
Applications of ferroelectrics, 2006. isaf '06. 15th ieee international symposium on the
Conference_Location :
Sunset Beach, NC
Print_ISBN :
978-1-4244-1331-7
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2006.4387881
