Enhancing dielectric properties of epoxy-based nanocomposites reinforced with yttrium oxide (Y2O3) nanoparticles for high-voltage insulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00639472" target="_blank" >RIV/68081723:_____/25:00639472 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081731:_____/25:00639472 RIV/00216305:26220/26:0198245

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0921510725004313" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0921510725004313</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mseb.2025.118407" target="_blank" >10.1016/j.mseb.2025.118407</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhancing dielectric properties of epoxy-based nanocomposites reinforced with yttrium oxide (Y2O3) nanoparticles for high-voltage insulation

Popis výsledku v původním jazyce

This study investigates the enhancement of dielectric properties in epoxy resin-based nanocomposites by incorporating yttrium oxide nanoparticles (Y2O3) for high-voltage insulation applications. Nanocomposites with Y2O3 concentrations of 3, 6, 9, 12, and 15 wt % were fabricated and characterized. Dielectric relaxation spectroscopy (10- 2-106 Hz) was used to evaluate key parameters-including permittivity, conductivity, activation energy, and conduction mechanisms-across temperatures ranging from 30 to 170 degrees C. Structural and morphological analyses via scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX) and Xray diffraction (XRD) confirmed uniform nanoparticle dispersion in the epoxy matrix, with minor agglomeration observed at higher filler loadings. The 6 wt % nanocomposite exhibited optimal performance, demonstrating the lowest permittivity, conductivity, and activation energy (9.5 meV). In contrast, increasing the Y2O3 concentration to 15 wt % raised the activation energy to 11 meV and increased permittivity. Conductivity showed a temperature-dependent rise, consistent with thermal activation. A transition in the conduction mechanism from quantum mechanical tunneling to correlated barrier hopping (CBH) occurred at 110 degrees C, accompanied by a decrease in permittivity and a shift in crossover frequency (toward lower frequencies at reduced temperatures and higher frequencies at elevated temperatures). The beta-relaxation mode remained dominant across the entire temperature range, highlighting the potential of epoxy/Y2O3 nanocomposites as advanced dielectric materials for high-voltage systems. These findings underscore a promising balance between thermal stability and dielectric efficiency.

Název v anglickém jazyce

Enhancing dielectric properties of epoxy-based nanocomposites reinforced with yttrium oxide (Y2O3) nanoparticles for high-voltage insulation

Popis výsledku anglicky

This study investigates the enhancement of dielectric properties in epoxy resin-based nanocomposites by incorporating yttrium oxide nanoparticles (Y2O3) for high-voltage insulation applications. Nanocomposites with Y2O3 concentrations of 3, 6, 9, 12, and 15 wt % were fabricated and characterized. Dielectric relaxation spectroscopy (10- 2-106 Hz) was used to evaluate key parameters-including permittivity, conductivity, activation energy, and conduction mechanisms-across temperatures ranging from 30 to 170 degrees C. Structural and morphological analyses via scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX) and Xray diffraction (XRD) confirmed uniform nanoparticle dispersion in the epoxy matrix, with minor agglomeration observed at higher filler loadings. The 6 wt % nanocomposite exhibited optimal performance, demonstrating the lowest permittivity, conductivity, and activation energy (9.5 meV). In contrast, increasing the Y2O3 concentration to 15 wt % raised the activation energy to 11 meV and increased permittivity. Conductivity showed a temperature-dependent rise, consistent with thermal activation. A transition in the conduction mechanism from quantum mechanical tunneling to correlated barrier hopping (CBH) occurred at 110 degrees C, accompanied by a decrease in permittivity and a shift in crossover frequency (toward lower frequencies at reduced temperatures and higher frequencies at elevated temperatures). The beta-relaxation mode remained dominant across the entire temperature range, highlighting the potential of epoxy/Y2O3 nanocomposites as advanced dielectric materials for high-voltage systems. These findings underscore a promising balance between thermal stability and dielectric efficiency.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GF25-19981L" target="_blank" >GF25-19981L: INFASCOPE – Integrovaná analýza autoemisních zdrojů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Science and Engineering B-Advanced Functional Solid-State Materials

ISSN

0921-5107

e-ISSN

1873-4944

Svazek periodika

320

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

118407

Kód UT WoS článku

001492247700001

EID výsledku v databázi Scopus

2-s2.0-105004872586