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ANT_DREAM

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6Â¥2009-10-07 07:23:57
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ANT_DREAM

½ð³æ (СÓÐÃûÆø)

Piezoelectric properties of (1  x)Pb(Zr1/2Ti1/2)O3¨CxPb(Zn1/3Nb2/3)O3
ceramics prepared by the columbite¨C(wolframite) precursor method
N. Vittayakorn a,*, C. Puchmark b, G. Rujijanagul c, X. Tan d, D.P. Cann d
a Department of Chemistry, Faculty of Science, King Mongkut¡¯s Institute of Technology Ladkrabung, Bangkok 10520, Thailand
b Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand
c Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
d Materials Science and Engineering Department, Iowa State University, Ames, IA 50011, USA
Available online 22 December 2005

Abstract
Solid solutions of the perovskite structure, (1  x)Pb(Zr1/2Ti1/2)O3¨CxPb(Zn1/3Nb2/3)O3 with x = 0.1¨C0.5, were synthesized via the columbite¨C(
wolframite) precursor method. The phase development of calcined powder precursors was analyzed by X-ray diffraction. Phasepure
perovskite of PZN¨CPZT ceramics was obtained over a wide compositional range. The microstructure and piezoelectric properties
were characterrized by means of scanning electron microscopy (SEM), d33 measurements and impedance analysis. It has been found that
ultra-high piezoelectric properties were observed in compositions close to a morphotropic phase boundary (MPB). The maximum value
of d33 (690 pC/N) and the highest kp (0.7) were recorded for the composition x = 0.3 located at the boundary between tetragonal and
rhombohedral ferroelectric phases. Furthermore, large values of d33 (600 pC/N) and kp (0.67) were observed at a compositions of
x = 0.5, which is the boundary between two ferroelectric rhombohedral phases.
 2005 Elsevier B.V. All rights reserved.
PACS: 77.84.Dy; 77.65.j; 77.80.Bh
Keywords: PZT; Piezoelectricity; Ferroelectricity; Phase transitions

4. Conclusions
Columbite (ZnNb2O6) and wolframite (ZrTiO4) precursors
were utilized to prepare highly pure PZN¨CPZT solid
solutions. Superior piezoelectric properties were obtained
in the compositions located close to the two MPBs found
in this system. The maximum value of d33 (690 pC/N)
and the highest kp (0.7) were recorded for the composition
x = 0.3. Furthermore, high values of d33 (600 pC/N) and kp
(0.67) were also observed at composition of x = 0.5.
7Â¥2009-10-07 11:27:11
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ANT_DREAM

½ð³æ (СÓÐÃûÆø)

http://www.namipan.com/d/Piezoel ... pplied-Physics.pdf/    ÎÄÏ×ûÓÐ˵²ôÔӵģ¬Ò²Ã»ÓÐÈÈѹ.²»¹ýÎÒÔÚ1400¡æÃ»Óкϳɴ¿µÄZrTiO4¡£
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8Â¥2009-10-07 11:35:39
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chinaworm

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