ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The influences of the substitution of (Zn1/3Nb2/3) group for Ti as well as addition of Fe2O3 andK2CO3 on d33, kp, εr, and tgδ of the Pb[Zr0.46Ti0.54-x(Zn1/3Nb2/3)x]O3 + y mol%Fe2O3+z mol%K2CO3 (PZNPZT)(0 ≤ x ≤ 0.20, 0 ≤ y ≤ 0.10, 0 ≤ z ≤ 0.20) ceramics were investigated. The experimental resultsdemonstrated that when x increases in Pb[Zr0.46Ti0.54-x(Zn1/3Nb2/3)x]O3+0.3 mol%Fe2O3+0.5mol%K2CO3ceramics, the d33, kp, εr, and tgδ increase and approach to their maximum values, then eventually decrease.XRD analysis revealed that the perovskite structure of the materials transfers from tetragonal phase torhombohedral phase. The relative dielectric constant (εr) decreases dramatically in the rhombohedralphase area near the MPB; the d33 and εr decrease with the small amount of added Fe2O3 and K2CO3, whichalso contributes to densification of the PZN-PZT ceramics. The optimized piezoelectric performancesthrough the experiment were obtained as d33=280 pC/N, kp=0.62, εr=900, tgδ=0.003
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.7.pdf
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