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2Â¥2009-10-06 14:17:55
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ANT_DREAM(½ð±Ò+1,VIP+0):лл 10-6 17:12
ANT_DREAM(½ð±Ò+1,VIP+0):лл 10-6 17:12
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3Â¥2009-10-06 15:00:35
ANT_DREAM
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4Â¥2009-10-06 17:16:36
ʧÂäµÄºòÄñ
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ANT_DREAM(½ð±Ò+1):лл²ÎÓë
ANT_DREAM(½ð±Ò+1):лл²ÎÓë
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5Â¥2009-10-06 22:11:10
chinaworm
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6Â¥2009-10-07 07:23:57
ANT_DREAM
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|
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
ANT_DREAM
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- ½ð±Ò: 2490.3
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- ³æºÅ: 581761
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|
http://www.namipan.com/d/Piezoel ... pplied-Physics.pdf/ ÎÄÏ×ûÓÐ˵²ôÔӵģ¬Ò²Ã»ÓÐÈÈѹ.²»¹ýÎÒÔÚ1400¡æÃ»Óкϳɴ¿µÄZrTiO4¡£ ÁíÍâÆæ¹ÖµÄÊÇ£¬Áíһλ̩¹úѧÕßÒýÓÃËûÕâÆªÎÄÏ×ʱȴÌáµ½0.3pzn-0.7pztµÄd33Ö»ÓÐ400¶à |
8Â¥2009-10-07 11:35:39
chinaworm
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ר¼Ò¾Ñé: +731 - Ó¦Öú: 419 (˶ʿ)
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9Â¥2009-10-07 18:51:20
µ²´Ã÷Ô¶
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10Â¥2009-10-08 00:27:52














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