Investigation on space charge and charge trap characteristics of gamma‐irradiated epoxy micro–nano composites

Autor: Takahiro Imai, Ramanujam Sarathi, Myneni Sukesh Babu, Nilesh J. Vasa
Rok vydání: 2020
Předmět:
Electron mobility
Physics::Medical Physics
vickers hardness number
relative permittivity
gamma-irradiated epoxy nanocomposites
electron traps
space charge accumulation
gamma-irradiated epoxy microcomposites
Composite material
carrier mobility
plasma temperature
gamma-irradiated specimen
dc conductivity
sio(2)
dielectric losses
ion line-atomic line intensity ratio
space charge density
laser-induced breakdown spectroscopy
microsilica
resins
loss tangent
trap distribution characteristics
silicon compounds
radiation dose
lcsh:TK1-9971
Permittivity
surface potential
Materials science
lcsh:QC501-721
Energy Engineering and Power Technology
Activation energy
Ion
spectrochemical analysis
nanocomposites
lcsh:Electricity
mixing
Irradiation
Electrical and Electronic Engineering
gamma-ray effects
shear mixing process
electrical conductivity
vickers hardness
charge decay rate
surface potential decay rate
Plasma
permittivity
Space charge
nanomechanics
charge trap characteristics
activation energy
elemental composition
Vickers hardness test
charge mobility
arrhenius law
nanoparticles
space charge
poling
lcsh:Electrical engineering. Electronics. Nuclear engineering
ion trapping nanoparticle
filled polymers
Zdroj: High Voltage (2019)
ISSN: 2397-7264
DOI: 10.1049/hve.2019.0188
Popis: Epoxy nano–micro composite specimen prepared with micro silica and ion trapping nanoparticle, by shear mixing process, was exposed to gamma radiation and its performance for space charge and charge trap characteristics were analysed. The threshold for space charge accumulation of epoxy nanocomposites reduces and rate of space charge accumulation increases with an increase in dosage of gamma irradiation. The average growth of space charge density during poling and charge decay rate during depoling are relatively higher for gamma-irradiated specimens than the virgin specimen. The initial surface potential has a marginal reduction with increase in the dosage of gamma radiation, but the surface potential decay rate has increased significantly. Trap distribution characteristics indicate more number of shallow traps and increase in charge mobility after irradiation. The relative permittivity and loss tangent of the specimens have high impact due to gamma irradiation. The activation energy calculated from DC conductivity by Arrhenius law reduces with increment in radiation dose. Laser-induced breakdown spectroscopy reflected no change in elemental composition with gamma-irradiated specimen. The variation in plasma temperature and ion line to atomic line intensity ratio with dosage of gamma radiation have direct correlation to the Vickers hardness number of the specimens.
Databáze: OpenAIRE
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