Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content
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2023
Authors
Djoković, VladimirDudić, Duško
Dojčilović, Radovan
Marinković, Filip
Pavlović, Vera P.
Pavlović, Vladimir B.
Vlahović, Branislav
Article (Published version)
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Barium titanate (BT) perovskite particles were surface modified by means of mechanical treatment and used as inorganic component in polyvinylidene fluoride (PVDF) based composites. The changes in electrical properties of the composite films with increasing in filler content were followed by dielectric spectroscopy, breakdown strength and D-E measurements. A comparison of the properties of the composites prepared with untreated and mechanically activated particles revealed that there is a significant difference in their performances at low filler concentrations (<20 wt%). Introduction of the surface modified ceramic particles into PVDF matrix led to an increase of the dielectric constant without affecting significantly the electrical breakdown strength. In contrast, when as received BT particles were used a filler, both dielectric constants and breakdown strengths of the composite films were lower than the corresponding values observed for the pure PVDF. At higher concentrations, howeve...r, the influence of pre-treatment of the filler on the effective electrical properties becomes less significant. The obtained results were discussed in terms of the pronounced crystallization of polar β and γ crystal phases of PVDF in the presence of surface modified BT fillers, which is confirmed by Raman spectroscopy.
Keywords:
barium titanate / PVDF / composite / dielectric / mechanical activationSource:
Physica Scripta, 2023, 98, 11, 115932-Publisher:
- IOP Publishing Ltd
Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča) (RS-MESTD-inst-2020-200017)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200162 (University of Belgrade, Faculty of Physics) (RS-MESTD-inst-2020-200162)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200105 (University of Belgrade, Faculty of Mechanical Engineering) (RS-MESTD-inst-2020-200105)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200116 (University of Belgrade, Faculty of Agriculture) (RS-MESTD-inst-2020-200116)
- US National Science Foundation [DMR-2101041]
- US Department of Energy/National Nuclear Security Administration [NA0003979]
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Mašinski fakultetTY - JOUR AU - Djoković, Vladimir AU - Dudić, Duško AU - Dojčilović, Radovan AU - Marinković, Filip AU - Pavlović, Vera P. AU - Pavlović, Vladimir B. AU - Vlahović, Branislav PY - 2023 UR - https://machinery.mas.bg.ac.rs/handle/123456789/7061 AB - Barium titanate (BT) perovskite particles were surface modified by means of mechanical treatment and used as inorganic component in polyvinylidene fluoride (PVDF) based composites. The changes in electrical properties of the composite films with increasing in filler content were followed by dielectric spectroscopy, breakdown strength and D-E measurements. A comparison of the properties of the composites prepared with untreated and mechanically activated particles revealed that there is a significant difference in their performances at low filler concentrations (<20 wt%). Introduction of the surface modified ceramic particles into PVDF matrix led to an increase of the dielectric constant without affecting significantly the electrical breakdown strength. In contrast, when as received BT particles were used a filler, both dielectric constants and breakdown strengths of the composite films were lower than the corresponding values observed for the pure PVDF. At higher concentrations, however, the influence of pre-treatment of the filler on the effective electrical properties becomes less significant. The obtained results were discussed in terms of the pronounced crystallization of polar β and γ crystal phases of PVDF in the presence of surface modified BT fillers, which is confirmed by Raman spectroscopy. PB - IOP Publishing Ltd T2 - Physica Scripta T1 - Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content IS - 11 SP - 115932 VL - 98 DO - 10.1088/1402-4896/acff4d ER -
@article{ author = "Djoković, Vladimir and Dudić, Duško and Dojčilović, Radovan and Marinković, Filip and Pavlović, Vera P. and Pavlović, Vladimir B. and Vlahović, Branislav", year = "2023", abstract = "Barium titanate (BT) perovskite particles were surface modified by means of mechanical treatment and used as inorganic component in polyvinylidene fluoride (PVDF) based composites. The changes in electrical properties of the composite films with increasing in filler content were followed by dielectric spectroscopy, breakdown strength and D-E measurements. A comparison of the properties of the composites prepared with untreated and mechanically activated particles revealed that there is a significant difference in their performances at low filler concentrations (<20 wt%). Introduction of the surface modified ceramic particles into PVDF matrix led to an increase of the dielectric constant without affecting significantly the electrical breakdown strength. In contrast, when as received BT particles were used a filler, both dielectric constants and breakdown strengths of the composite films were lower than the corresponding values observed for the pure PVDF. At higher concentrations, however, the influence of pre-treatment of the filler on the effective electrical properties becomes less significant. The obtained results were discussed in terms of the pronounced crystallization of polar β and γ crystal phases of PVDF in the presence of surface modified BT fillers, which is confirmed by Raman spectroscopy.", publisher = "IOP Publishing Ltd", journal = "Physica Scripta", title = "Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content", number = "11", pages = "115932", volume = "98", doi = "10.1088/1402-4896/acff4d" }
Djoković, V., Dudić, D., Dojčilović, R., Marinković, F., Pavlović, V. P., Pavlović, V. B.,& Vlahović, B.. (2023). Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content. in Physica Scripta IOP Publishing Ltd., 98(11), 115932. https://doi.org/10.1088/1402-4896/acff4d
Djoković V, Dudić D, Dojčilović R, Marinković F, Pavlović VP, Pavlović VB, Vlahović B. Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content. in Physica Scripta. 2023;98(11):115932. doi:10.1088/1402-4896/acff4d .
Djoković, Vladimir, Dudić, Duško, Dojčilović, Radovan, Marinković, Filip, Pavlović, Vera P., Pavlović, Vladimir B., Vlahović, Branislav, "Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content" in Physica Scripta, 98, no. 11 (2023):115932, https://doi.org/10.1088/1402-4896/acff4d . .