PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix
Authors
Pavlović, Vera P.
Tošić, Dragana
Dojčilović, Radovan

Dudić, Duško
Dramićanin, Miroslav D.
Medić, Mina
McPherson, Michael M.
Pavlović, Vladimir B.

Vlahović, Branislav

Đoković, Vladimir

Article (Published version)
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Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperatur...e) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz.
Keywords:
PVDF-HFP/NKBT / composites / perovskitesSource:
Polymer Testing, 2021, 96, 107093-Publisher:
- Elsevier BV
Funding / projects:
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-172056)
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-45020)
- Investigation of the effect of parameters of synthesis and processing on dielectric, optical and magnetic properties, both bulk and surface of crystal and polymeric systems (RS-171029)
- United States National Science Foundation (NSF) / Centers of Research Excellence in Science and Technology (CREST), Grant HRD-0833184
- United States National Science Foundation (NSF) / Partnerships for Research and Education in Materials (PREM), Grant 1523617
DOI: 10.1016/j.polymertesting.2021.107093
ISSN: 01429418
WoS: 000663792300029
Scopus: 2-s2.0-85100677797
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Pavlović, Vera P. AU - Tošić, Dragana AU - Dojčilović, Radovan AU - Dudić, Duško AU - Dramićanin, Miroslav D. AU - Medić, Mina AU - McPherson, Michael M. AU - Pavlović, Vladimir B. AU - Vlahović, Branislav AU - Đoković, Vladimir PY - 2021 UR - https://dais.sanu.ac.rs/123456789/10535 AB - Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz. PB - Elsevier BV T2 - Polymer Testing T1 - PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix SP - 107093 VL - 96 DO - 10.1016/j.polymertesting.2021.107093 UR - https://hdl.handle.net/21.15107/rcub_dais_10535 ER -
@article{ author = "Pavlović, Vera P. and Tošić, Dragana and Dojčilović, Radovan and Dudić, Duško and Dramićanin, Miroslav D. and Medić, Mina and McPherson, Michael M. and Pavlović, Vladimir B. and Vlahović, Branislav and Đoković, Vladimir", year = "2021", abstract = "Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz.", publisher = "Elsevier BV", journal = "Polymer Testing", title = "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix", pages = "107093", volume = "96", doi = "10.1016/j.polymertesting.2021.107093", url = "https://hdl.handle.net/21.15107/rcub_dais_10535" }
Pavlović, V. P., Tošić, D., Dojčilović, R., Dudić, D., Dramićanin, M. D., Medić, M., McPherson, M. M., Pavlović, V. B., Vlahović, B.,& Đoković, V.. (2021). PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing Elsevier BV., 96, 107093. https://doi.org/10.1016/j.polymertesting.2021.107093 https://hdl.handle.net/21.15107/rcub_dais_10535
Pavlović VP, Tošić D, Dojčilović R, Dudić D, Dramićanin MD, Medić M, McPherson MM, Pavlović VB, Vlahović B, Đoković V. PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing. 2021;96:107093. doi:10.1016/j.polymertesting.2021.107093 https://hdl.handle.net/21.15107/rcub_dais_10535 .
Pavlović, Vera P., Tošić, Dragana, Dojčilović, Radovan, Dudić, Duško, Dramićanin, Miroslav D., Medić, Mina, McPherson, Michael M., Pavlović, Vladimir B., Vlahović, Branislav, Đoković, Vladimir, "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix" in Polymer Testing, 96 (2021):107093, https://doi.org/10.1016/j.polymertesting.2021.107093 ., https://hdl.handle.net/21.15107/rcub_dais_10535 .