Title :
5B-2 Growth and Properties of Some Relaxor-Based Ferroelectric Single Crystals with High Curie Temperature by the Solution Bridgman and Modified Bridgman Techniques
Author :
Xu, Guisheng ; Yang, Danfeng ; Chen, Kai ; Wang, Xiaofeng ; Li, Junbao
Author_Institution :
R&D Center of Synthetic Crystals in Shanghai Inst. of Ceramics, Chinese Acad. of Sci., Shanghai
Abstract :
The solution Bridgman technique and modified Bridgman one have been used to grow the binary system 0.65Pb(Infrac12Nbfrac12)O3-0.35 PbTiO3 (starting composition) and ternary system 0.28Pb(In frac12Nbfrac12)O3-0.40Pb(Mg1/3 Nb2/3)O3-0.32PbTiO3 single crystals, respectively. The obtained PINT66/34 crystals show high Tc (269degC), Trt (134degC) and good piezoelectric properties (d33~2000pC/N) on the (001) cuts. Whereas, the as-grown PIMNT single crystals have reached the size of phi45mmtimes80mm boules and 25times25times1mm wafers. The large PIMNT crystals exhibit not only ultrahigh piezoelectric properties (d 33~1700-2200pC/N, epsiv-5000 and k33~92%) on (001)-cuts, but also higher Curie temperature (Tc>190degC), higher rhombohedral-tetragonal transition temperature (Trt~120degC) and higher coercive field (Ec~10.88kV/cm) than PMNT or PZNT crystals near their morphotropic phase boundary
Keywords :
crystal growth from melt; ferroelectric Curie temperature; lead compounds; niobium compounds; phase transformations; piezoelectric materials; piezoelectricity; relaxor ferroelectrics; 134 C; 269 C; PIMNT single crystals; PINT66/34 crystals; Pb(In0.5Nb0.5)O3 PbTiO3 ; Pb(In0.5Nbo.5)O3Pb(Mg0.33 Nb0.66)O3PbTiO3; coercive field; crystal growth; crystal properties; high Curie temperature; modified Bridgman technique; morphotropic phase boundary; niobate; relaxor-based ferroelectric single crystals; rhombohedral-tetragonal transition temperature; solution Bridgman technique; ultrahigh piezoelectric properties; Acoustic devices; Acoustic measurements; Acoustic transducers; Ceramics; Crystalline materials; Crystals; Dielectric measurements; Ferroelectric materials; Laboratories; Temperature;
Conference_Titel :
Ultrasonics Symposium, 2006. IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-0201-8
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2006.60
