Title :
A study on the relationship of phase equilibrium and electromechanical properties in the modified PbTiO3-BiFeO3 system
Author :
Lu, Peiwen ; Zheng, Weiye ; Shen, Dawei ; Xue, Wanrong ; Zhao, Meiyu
Author_Institution :
Nanjing Inst. of Chem. Technol., China
fDate :
30 Aug-2 Sep 1992
Abstract :
In the modified PbTiO3-BiFeO3 system, there is a morphotropic phase boundary (MPB) between the tetragonal and rhombohedral phases. The electromechanical properties of ceramics with composition near the MPB were examined. It is shown that, when the BiFeO 3 content is within 57.5-60 mol.%, there is a mutation of electromechanical properties in the modified PbTiO3 system, making them similar to those of the PbTiO3-PbZrO3 system. In order to explain this mutation, the microstructure, domain structure, and electron diffraction of samples were observed by scanning electron microscopy (SEM). It was found that the special microstructure, domain structure, and one-dimensional superlattice observed in the samples may be the cause of the excellent electromechanical properties of these ceramics
Keywords :
bismuth compounds; ceramics; crystal microstructure; domains; electron diffraction examination of materials; lead compounds; phase equilibrium; piezoelectric materials; scanning electron microscope examination of materials; superlattices; MPB; PbTiO3-BiFeO3 system; SEM; ceramics; domain structure; electromechanical properties; electron diffraction; microstructure; morphotropic phase boundary; mutation; one-dimensional superlattice; phase equilibrium; piezoelectric coefficient; rhombohedral phases; scanning electron microscopy; tetragonal phases; Anisotropic magnetoresistance; Capacitive sensors; Ceramics; Crystallography; Diffraction; Microstructure; Piezoelectric materials; Piezoelectric transducers; Solids; Temperature dependence;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300570
