Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 617, Issue -, Pages 485-490Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.08.016
Keywords
Multiferroic composites; Co-fired ceramics; Piezoelectric properties; Core-shell structure; Magnetoelectric (ME) effect
Categories
Funding
- Hong Kong Polytechnic University [4-ZZDC]
- [1-ZVCG]
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Using LiF and PbF2 (mole ratio 1:1, LPF) as sintering additives, the xCoFe(2)O(4)/(1 - x) Pb0.9025La0.065(Zr-0.58-Ti-0.42)(0.975)Nb0.02O3 [x = 0.1, 0.2, 0.3, and 0.4 in weight] (abbreviate as CFO/PLZT) 0-3 magnetoelectric (ME) composite ceramics were developed via a liquid phase sintering technique. A ZrO2 layer was coated on the CFO particles via a sol-gel method in order to inhibit the diffusion of Fe3+ and Co2+ ions from the ferrite CFO phase to the ferroelectric PLZT phase. With using 6 wt% additives of LPF, dense composite ceramics can be obtained in a sintering temperature region of 1000-1150 degrees C for 30 mm. Moreover, overall performance of the ceramics with relatively low CFO content (x = 0.2) has been optimized. The effects of CFO content and sintering temperature on micromorphology, crystalline structure, piezoelectric, dielectric, and ME properties were investigated. It was found that the 0.2CFO/0.8PLZT composite ceramics exhibited a d(33) of 80 pC/N and a ME coefficient of 102 mV/Oe cm at 215 kHz. (C) 2014 Elsevier B.V. All rights reserved.
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