Title :
The effect of segregation during the growth of relaxor ferroelectric PMNT single crystals
Author :
Luo, Haosu ; Xu, Guisheng ; Xu, Haiqing ; Wang, Pingchu ; Yin, Zhiwen
Author_Institution :
Inst. of Ceramics, Acad. Sinica, Shanghai, China
Abstract :
Relaxor-based ferroelectric (1-x)PMN-xPT (x=0.2-0.4) single crystals were grown by a modified Bridgman method. The segregation during the growth of (1-x)PMN-xPT single crystals directly from melt was investigated by several ways for the samples cut from initial part and the end part of a boule. The effect of segregation during the growth of solid solution (1-x)PMN-xPT single crystals was verified in melting points from DTA analysis, lattice structures from XRD and other electric properties. The segregation coefficient k is about 0.95 during the growth of PMNT 76/24 single crystal. In order to improve the homogeneity within a boule, the effect of segregation must be taken into account to grow large high quality (1-x)PMN-xPT single crystals
Keywords :
X-ray diffraction; crystal growth from melt; crystal structure; differential thermal analysis; ferroelectric ceramics; lead compounds; melting point; segregation; DTA; PMN-PT; PMN-PbTiO3; PMNT; PbMgO3NbO3-PbTiO3; XRD; electric properties; homogeneity; lattice structure; melting point; modified Bridgman growth; relaxor ferroelectric; segregation effects; single crystals; solid solution; Crystals; Furnaces; Inorganic materials; Laboratories; Lattices; Phase measurement; Powders; Relaxor ferroelectrics; Solids; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.942408
