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《CHINESE JOURNAL OF MATERIAL RESEARCH》 2000-05
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MICROSTRUCTURE AND DOMAIN STRUCTURE OF 67Pb(Mg_(1/3)Nb_(2/3))O_3-33PbTiO_3 SINGLE CRYSTAL

LI Donglin; WANG Pingchu; LUO Haosu; PAN Xiaoming; ZHANG Shen; YIN Zhiwen (Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, The Chinese Academy of Sciences, Shanghai 200050)  
Ferroelectric domains in 67Ph(Mgl/3Nb2/3)O3--33PbTiO3 single crystals were studied by means of polarized light microscope (PLM) and transmission electron microscopy (TEM) PLM photographs revealed that the domain structures vary with crystal quality. The transparent crystals are usually characterized by large domains millimeters in size. Banded twin domains were found in translucent crystals. TEM study gave similar domain structure to those observed by PLM. The complicated twins were observed in translucent crystals. The irregular 180' domains with size of micrometers were observed in transparent crystals. The in situ EDS analysis showed that the crystals with twins contain Nb-Ti-Mg-Ph--O non--crystalline phase. Dielectric and pizoelectric constants of transparent crystals are better than translucent crystals. Electrical properties and the relevance of domains to corresponding microstructures were briefly discussed.
【Fund】: 国家自然科学基金重大项目!59995520;; 上海市基金资助项目!97EZ14036;; 上海市科委博士后基金资助项目.
【CateGory Index】: O614
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