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	Fabrication and evaluation of PZT/Ag composites and functionally graded piezoelectric actuators
	Zhang, H.L. ; Jing-Feng Li ; Bo-Ping Zhang
	2010-05-10 ; 2010-05-10
关键词	Practical Experimental/ composite materials firing (materials) fracture toughness functionally graded materials lead compounds piezoelectric actuators piezoelectricity powders silver/ functionally graded piezoelectric actuators metallic silver ceramic matrix piezoelectric composites fabrication mechanical properties interfacial debonding conventional bimorph-type piezoelectric actuator cofiring materials silver powders fracture strength fracture toughness piezoelectric properties piezoelectric constant 1200 C 1 h 100 to 500 V PZT-Ag PbZrO3TiO3-Ag/ B2860A Piezoelectric devices/ temperature 1.47E+03 K time 3.6E+03 s voltage 1.0E+02 to 5.0E+02 V/ PbZrO3TiO3-Ag/int PbZrO3TiO3/int TiO3/int ZrO3/int Ag/int O3/int Pb/int Ti/int Zr/int O/int PbZrO3TiO3/ss TiO3/ss ZrO3/ss O3/ss Pb/ss Ti/ss Zr/ss O/ss Ag/el
中文摘要	Metallic Ag as the second phase was added into PZT ceramic matrix to fabricate piezoelectric composites and functionally graded actuators by gradually altering Ag concentration, aimed to improve mechanical properties and to solve possible interfacial debonding usually observed in conventional bimorph-type piezoelectric actuator. The PZT/Ag composites were obtained by directly co-firing PZT and Ag powders at 1200 degrees C for 1 h. The fracture strength sigma /sub f/ and fracture toughness K/sub IC/ as well as the corresponding piezoelectric properties, were firstly evaluated upon the PZT/Ag composites for Ag concentrations of 0-30 vol%. The mechanical properties for the PZT/Ag composites were found to be greatly enhanced compared with pure PZT ceramics: from 69 to 129 MPa for sigma /sub f/ and from 1.0 to 3.7 MPa.m/sup 1/2/ for K/sub IC/. With increasing Ag concentration, the piezoelectric constant d/sub 33/ of PZT/Ag composites was found to decrease from 419 to 86 pC/N. Then, a functionally graded actuator was fabricated and evaluated in terms of electric-induced curvature k. The PZT/Ag FGM actuator with size of 12 mm*3mm*1mm has a curvature k of 0.03-0.17 m/sup -1/ that corresponds to applied voltages of 100-500 V. A comprehensive comparison was made on the mechanical property enhancements by the metal particles dispersion, and the bending displacements produced by the FGM actuators between the PZT/Ag and previously fabricated PZT/Pt systems.
语种	英语 ; 英语
出版者	Kluwer Academic Publishers ; Netherlands
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/20886]
专题	清华大学
推荐引用方式 GB/T 7714	Zhang, H.L.,Jing-Feng Li,Bo-Ping Zhang. Fabrication and evaluation of PZT/Ag composites and functionally graded piezoelectric actuators[J],2010, 2010.
APA	Zhang, H.L.,Jing-Feng Li,&Bo-Ping Zhang.(2010).Fabrication and evaluation of PZT/Ag composites and functionally graded piezoelectric actuators..
MLA	Zhang, H.L.,et al."Fabrication and evaluation of PZT/Ag composites and functionally graded piezoelectric actuators".(2010).

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