Effect of Pb(Fe{sub 1/2}Nb{sub 1/2})O{sub 3} modification on dielectric and piezoelectric properties of Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-PbZr{sub 0.52}Ti{sub 0.48}O{sub 3} ceramics
- Department of Chemistry, Tsinghua University, Beijing 100084 (China)
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083 (China)
Highlights: {yields} 10 mol% PFN modified PMN-PZT relaxor ferroelectric ceramics were prepared by the conventional solid-state mixed-oxide technique, and their structure, dielectric and piezoelectric properties were studied. {yields} At the frequency of 1 kHz, the maximum dielectric constant at room temperature ({epsilon}{sub r}) was 3519 and maximum dielectric constant ({epsilon}{sub m}) was 20,475, corresponding to the (0.9 - x)PMN-0.1PFN-xPZT ceramic composition of x = 0.8. While the sample with composition of x = 0.3 possessed the maximum dielectric relaxor factor of {gamma} = 1.94. The Curie temperature T{sub c} could be higher than 300 {sup o}C around morphotropic phase boundary (MPB) area which is much higher than some other system. {yields} The largest d{sub 33} could be as high as 318 pC/N when x = 0.9. And the maximum remnant polarization P{sub r} was 28.3 {mu}C/cm{sup 2} at x = 0.4. -- Abstract: 10 mol% Pb(Fe{sub 1/2}Nb{sub 1/2})O{sub 3} (PFN) modified Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-PbZr{sub 0.52}Ti{sub 0.48}O{sub 3} (PMN-PZT) relaxor ferroelectric ceramics with compositions of (0.9 - x)PMN-0.1PFN-xPZT (x = 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9) were prepared. X-ray diffraction investigations indicated that as-prepared ceramics were of pure perovskite phase and the sample with composition of x = 0.8 was close to morphotropic phase boundary (MPB) between rhombohedral and tetragonal phase. Dielectric properties of the as-prepared ceramics were measured, and the Curie temperature (T{sub c}) increased sharply with increasing PZT content and could be higher than 300 {sup o}C around morphotropic phase boundary (MPB) area. At 1 kHz, the sample with composition of x = 0.1 had the largest room temperature dielectric constant {epsilon}{sub r} = 3519 and maximum dielectric constant {epsilon}{sub m} = 20,475 at T{sub m}, while the sample with composition of x = 0.3 possessed the maximum dielectric relaxor factor of {gamma} = 1.94. The largest d{sub 33} = 318 pC/N could be obtained from as-prepared ceramics at x = 0.9. The maximum remnant polarization (P{sub r} = 28.3 {mu}C/cm{sup 2}) was obtained from as-prepared ceramics at x = 0.4.
- OSTI ID:
- 22212247
- Journal Information:
- Materials Research Bulletin, Vol. 46, Issue 9; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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