Effect of polyvinylidene fluoride on the fracture microstructure characteristics and piezoelectric and mechanical properties of 0-3 barium zirconate titanate ceramic-cement composites |
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| Affiliation: | 1. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand;2. PhD’s Degree Program in Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand;3. Center of Excellence in Materials Science and Technology, Chiang Mai University, Thailand;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. Program in Materials Science, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand;2. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand |
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| Abstract: | Barium zirconate titanate (40?60 vol.%; BZT), Portland cement (PC) and polyvinylidene fluoride (0?7 vol.%; PVDF) were used as raw materials to produce 0–3 piezoelectric cement-based composites. The highest piezoelectric charge coefficient (d33～26-27 pC/N) was found at 50?60 vol.% BZT with 5 vol.% PVDF. Moreover, the composite with 50 vol.% BZT and 5 vol.% PVDF had the highest piezoelectric voltage coefficient (g33 = 16.0 × 10?3 V·m/N). Scanning electron microscopy was used to investigate the morphology of the fracture surface of the composite. When PVDF was used in the composite, it was observed to fill some pores at the interface zone and within the cement phase. The elastic behaviour of PVDF could also be seen in the fracture surface, where it appeared as a stretched material different from both the BZT ceramic and cement, which are brittle materials. In addition, increasing the PVDF content led to increased fracture toughness. |
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| Keywords: | B Composites C Piezoelectric properties C Fracture Polyvinylidene fluoride |
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