Influence of microwave sintering on electrical properties of BCTZ lead free piezoelectric ceramics |
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| Affiliation: | 1. Univ. Polytechnique Hauts-de-France, EA 2443 - LMCPA - Laboratoire des Matériaux Céramiques et Procédés Associés, F-59313 Valenciennes, France;2. IRCER - UMR CNRS 7315, Centre Européen de la Céramique, 12 Rue Atlantis, F-87068 Limoges Cedex, France;1. Opto-electronics Materials & Devices Research Center, Korea Institute of Science & Technology (KIST), Seoul, 02792, Republic of Korea;2. Dept. of Nanomaterials Science & Technology, University of Science & Technology (UST), Daejeon, 34113, Republic of Korea;1. School of Ceramic Engineering, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand;2. Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand;3. Department of Materials Science and Engineering, Faculty of Natural Sciences, Norwegian University of Science and Technology, 7492 Trondheim, Norway;1. Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand;2. Research Center for Academic Excellence in Applied Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand;3. Integrated Nanotechnology Research Center (INRC), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;4. Research Center for Academic Excellence in Petroleum, Petrochemicals and Advanced Materials, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand |
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| Abstract: | Barium titanate doped with calcium and zirconium (BCTZ) could be used at low temperature to replace lead based piezoelectric ceramics (PZT). The classical way to obtain BCTZ is the solid-state route coupled with conventional sintering, but this step is time-consuming. To reduce the duration of this process, microwave heating was used for sintering. It is a fast sintering method and the heating rate was around 200 °C/min in this study. Slightly better electrical properties with finer microstructures (d33* = 706 pm/V, grain size about 42.1 ± 14.2 μm) were obtained for samples sintered by microwave heating during 50 min compared to the conventional sintering (d33* = 622 pm/V, 22.6 ± 4.4 μm). The main result of this study is that by using microwave heating, the sintering step duration (including heating, dwell time and cooling) was drastically reduced: 1.5 h for microwave sintering against 12.5 h for conventional sintering. |
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| Keywords: | Microwave sintering Lead-free piezoceramics BCTZ Ferroelectric properties Piezoelectric properties |
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