DocumentCode
2912165
Title
Recent developments in transition temperature (Tc) perovskite crystals
Author
Shrout, Thomas R. ; Eitel, Richard ; Zhang, Shujun ; Randall, Clive ; Alberta, Edward ; Rehrig, Paul
Author_Institution
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Volume
1
fYear
2003
fDate
5-8 Oct. 2003
Firstpage
774
Abstract
This paper summarizes the temperature behavior of various relaxor-PT piezoelectric single crystals. Owing to the strongly curved morphotropic phase boundary (MPB), the usage temperature is limited by TR-T, the rhombohedral to tetragonal phase transformation occuring at significantly lower temperatures than Tc. Attempts to modify the temperature usage range of PMN-PT and PZN-PT rhombohedral crystals using minor dopant modifications were limited, with little success of significant potential are crystals of PYN-PT, with a Tc>330°C, even though TR-T was nearly half that value at ∼160°C. Lastly, single crystals in the novel Bi(Sc)O3-PbTiO3 system offer significantly higher Tcs>400°C, while exhibiting electromechanical coupling coefficients >90%.
Keywords
dielectric relaxation; lead compounds; permittivity; piezoceramics; piezoelectricity; solid-state phase transformations; (PbYbNb)O3-PbTiO3; PMN-PbTiO3; PZN PbTiO3 rhombohedral crystals; Pb(MgNB)O3-PbTiO3 rhombohedral crystals; PbMgO3NbO3-PbTiO3; PbZnO3NbO3-PbTiO3; electromechanical coupling coefficients; morphotropic phase boundary; perovskite crystals; relaxor PbTiO3 piezoelectric single crystals; tetragonal-rhombohedral phase transformation; transition temperature; Bioceramics; Crystalline materials; Crystals; Dielectrics; Educational institutions; Laboratories; Piezoelectric materials; Temperature dependence; Temperature distribution; Ultrasonic imaging;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics, 2003 IEEE Symposium on
Print_ISBN
0-7803-7922-5
Type
conf
DOI
10.1109/ULTSYM.2003.1293515
Filename
1293515
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