Processing of PVDF/Nb5+ and Sr2+-Doped PZT Composites for Applications in Advanced Dielectric Insulation: Effect of Ceramic Loading on Structure, Mechanical Properties, Electrical Properties, and Thermal Aging Behavior
- 1National Institute for Research and Development in Electrical Engineering (ICPE-CA), Unirii no. 3131, District 3, 030138 Bucharest, Romania
- 2Department of Electrical Measurements and Materials, Gheorghe Asachi Technical University, Bdul. D. Mangeron 71, 700050 Iasi, Romania
- 3All Green SRL, Str. I. Bacalu no. 5, 700023 Iasi, Romania
Abstract
In this study, four types of materials suitable for use as special insulation were produced. Polyvinylidene fluoride (PVDF) served as the polymer matrix, while PZT powders (a Pb(Zr0.52Ti0.48)O3 system doped with Nb5+ and Sr2+) were used as the filler material; the method for producing these powders is also described. The mass concentrations, expressed as PVDF/PZT ratios, were 100/0, 95/5, 90/10, and 80/20. Characterization analyses and tests were conducted to verify the materials’ suitability as insulators. Specifically, the materials underwent structural (SEM and FTIR), chemical (EDS), mechanical, and dielectric testing (measuring tan δ, εr, ρ, and Estr). Additionally, resistance to degradation at the maximum operating temperature was evaluated through thermal resistance tests at 150 °C. Finally, the remaining service life prior to complete material degradation—and the consequent need for replacement—was determined. All characterization tests indicated that the composite material with a 5% PZT powder concentration—which exhibits the best structural, mechanical, dielectric, and thermal properties—represents the optimal composite variant for insulation applications. Potential applications for these materials include coatings for electric field grading and voltage control, as well as insulation for high-voltage transients and impulses.
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BibTeX
@article{caramitu2026processing,
title = {{Processing of PVDF/Nb5+ and Sr2+-Doped PZT Composites for Applications in Advanced Dielectric Insulation: Effect of Ceramic Loading on Structure, Mechanical Properties, Electrical Properties, and Thermal Aging Behavior}},
author = {Alina Ruxandra Caramitu and Romeo Cristian Ciobanu and Alina Iulia Dumitru and Eduard-Marius Lungulescu and Magdalena Valentina Lungu and Virgil Emanuel Marinescu and Alexandru Chirica},
journal = {Polymers},
year = {2026},
month = oct,
doi = {10.3390/polym18192417},
url = {https://europepmc.org/article/PMC/PMC13666674},
note = {CC BY},
}
RIS
TY - JOUR
TI - Processing of PVDF/Nb5+ and Sr2+-Doped PZT Composites for Applications in Advanced Dielectric Insulation: Effect of Ceramic Loading on Structure, Mechanical Properties, Electrical Properties, and Thermal Aging Behavior
AU - Alina Ruxandra Caramitu
AU - Romeo Cristian Ciobanu
AU - Alina Iulia Dumitru
AU - Eduard-Marius Lungulescu
AU - Magdalena Valentina Lungu
AU - Virgil Emanuel Marinescu
AU - Alexandru Chirica
PY - 2026
DA - 2026/10/01
JO - Polymers
DO - 10.3390/polym18192417
UR - https://europepmc.org/article/PMC/PMC13666674
AB - In this study, four types of materials suitable for use as special insulation were produced. Polyvinylidene fluoride (PVDF) served as the polymer matrix, while PZT powders (a Pb(Zr0.52Ti0.48)O3 system doped with Nb5+ and Sr2+) were used as the filler material; the method for producing these powders is also described. The mass concentrations, expressed as PVDF/PZT ratios, were 100/0, 95/5, 90/10, and 80/20. Characterization analyses and tests were conducted to verify the materials’ suitability as insulators. Specifically, the materials underwent structural (SEM and FTIR), chemical (EDS), mechanical, and dielectric testing (measuring tan δ, εr, ρ, and Estr). Additionally, resistance to degradation at the maximum operating temperature was evaluated through thermal resistance tests at 150 °C. Finally, the remaining service life prior to complete material degradation—and the consequent need for replacement—was determined. All characterization tests indicated that the composite material with a 5% PZT powder concentration—which exhibits the best structural, mechanical, dielectric, and thermal properties—represents the optimal composite variant for insulation applications. Potential applications for these materials include coatings for electric field grading and voltage control, as well as insulation for high-voltage transients and impulses.
SN - 2073-4360
ER -