Complex impedance analysis of silver-phosphate glassy system doped with different concentrations of silver iodide

Shaheen, Adel A.; Maghrabi, Mufeed; Ghannam, H.; Al-Reyahi, Anas; Ayesh, Ahmad I.; Mousa, Ahmad A.

doi:10.1007/s00339-023-07220-w

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…Despite the presence of an interfacial nanolayer in epoxy/5 wt.% SiO 2 and MgO nanocomposites, the breakdown occurred to a lesser extent in the epoxy/MgO nanocomposite, as shown in Figure 11D [39,42,43]. This discrepancy can be attributed to the distinct thermal conductivity of each material [41]. The potential enhancement in DC breakdown strength may arise from the increased conductivity of the epoxy/5 wt.% SiO 2 and MgO nanocomposite.…”

Section: Dielectric Propertiesmentioning

confidence: 96%

“…Consequently, the Al 2 O 3 NPs remain dispersed and distant from each other [1,4,22,38]. It is noteworthy that the nonlinear conductivity is attributed to the presence of grain boundaries and the combined influence of both DC and AC conductivity [41]. Numerous sources in the literature have investigated this phenomenon, offering detailed discussions on the subject [1,4,22,38].…”

Section: Dielectric Propertiesmentioning

confidence: 99%

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Electrical Characterization of Epoxy Nanocomposite under High DC Voltage

Alsoud,

Daradkeh,

Al-Bashaish

et al. 2024

Polymers

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This work studies the direct current breakdown characteristics of unfilled epoxy and epoxy nonconductive nanocomposites (SiO2,MgO and Al2O3). It also examines the variation of electrical properties in epoxy nanocomposites. The novel aspect of this study is that the samples of Epoxy nanocomposite were exposed to high voltages of up to six kilo volts for three hours using field electron microscopy under high vacuum conditions (10−5 mbar). The current emitted from these samples was measured at three different intervals of time. In addition, the influence of high voltage on the permittivity, loss factor (tan(δ)), and conductivity of the epoxy nanocomposite was studied. This evaluation was conducted before and after applying the voltage at room temperature, The frequency range extends from 10−2–10−7 Hz using the Novo Control Alpha-A analyzer. Current–voltage characterization was performed through field electron microscopy. The samples were characterized by scanning electron microscopy–energy dispersive X-ray spectroscopy and Fourier Transform Infrared Spectroscopy. The unfilled epoxy exhibited structural degradation, resulting in the formation of holes when exposed to high voltages of up to six kilo volts, leading to a reduction in electrical properties. Nevertheless, the addition of nanoparticles shows a significant increase in the operational lifetime of the epoxy nanocomposite. The degree of increase in the lifetime of epoxy composite varied depending on several factors such as the type of NPs introduced and their respective sizes. The epoxy/Al2O3 nanocomposite comparing with epoxy/MgO and epoxy/SiO2 nanocomposite showed elevated resistance to direct current breakdown strength and maintaining its dielectric.

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Section: Dielectric Propertiesmentioning

confidence: 96%

Section: Dielectric Propertiesmentioning

confidence: 99%

Electrical Characterization of Epoxy Nanocomposite under High DC Voltage

Alsoud,

Daradkeh,

Al-Bashaish

et al. 2024

Polymers

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Electrical impedance characterization of (AgCl)0.05(AgPO3)0.95 and (AgBr)0.05(AgPO3)0.95 glassy systems over 5 K to 300 K temperature range

Badr

2024

Appl. Phys. A

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Effect of traps and conductive pathways on electron emission from copper broad-area composite emitters

Alsoud,

Mousa,

Al-Bashaish

et al. 2024

Phys. Scr.

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This paper offers an explanation of the process of electron emission from copper broad-area composite emitters (CBACEs) based on the principles of trapping and conductive pathways supported by experimental evidence. Emission current measurements were conducted on two CBACE, comprising copper coated with a 300-400μm epoxy resin, subjected to high voltages up to 15 kV. This study investigated the witch-on and collapse phenomena in the epoxy layer. Field electron microscopy (FEM) was operated under a high vacuum environment (10-6 mbar).This helps to follow changes in the value of the emission current (breakdown current). Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) and Fourier transform infrared spectroscopy (FTIR) were used to comprehensively characterize the composite emitter before and after exposure to high voltages. The mechanism of electron emission from composite broad-area emitters is explained, as well as how the epoxy breaks down when exposed to high voltage. The results showed that the emission pattern of copper broad-area emitters (CBAEs) was brighter at the edges. The emission pattern of the CBACEs was centered on a single bright point. The effect of coating on the (I-V) curve was studied. A simulation of the electric field acting on the coating was also performed to understand the contribution of the high field to the epoxy breakdown. Furthermore, impedance spectroscopy at frequencies ranging from 1 to 106 Hz showed that the high electric field decreased both the impedance and permittivity of the epoxy resins, as the changes in the Nyquist and Cole-Cole plots were studied before and after exposing the samples to a high electric field.

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Complex impedance analysis of silver-phosphate glassy system doped with different concentrations of silver iodide

Cited by 5 publications

References 30 publications

Electrical Characterization of Epoxy Nanocomposite under High DC Voltage

Electrical Characterization of Epoxy Nanocomposite under High DC Voltage

Electrical impedance characterization of (AgCl)0.05(AgPO3)0.95 and (AgBr)0.05(AgPO3)0.95 glassy systems over 5 K to 300 K temperature range

Effect of traps and conductive pathways on electron emission from copper broad-area composite emitters

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