Effect of one-dimensional tetra-needle-like ZnO whiskers on the electrical properties of montmorillonite/silicon carbide/epoxy micro-nanocomposites

Sun, Jiaming; Guo, Ning; Tang, Zifan; Gao, Junguo

doi:10.1007/s10854-023-10138-x

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…Sun et al investigated how different sizes of zinc oxide affected the electrical characteristics of MMT/SiC/EP micro-nano composites. They emphasized that tetra-needle-shaped zinc oxide promoted the formation of highly conductive pathways, leading to improved electrical conductivity and nonlinear coefficients [27,28]. While extensive research on epoxy-based composite dielectrics has laid the theoretical groundwork for superior anti-corona paint preparation, these studies primarily focus on nanofiller type, content, and dimensions, overlooking changes in the electrical properties and thermal stability of the composite dielectric postprolonged motor operation.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Conductivity and Thermal Stability of Anti-Corona Epoxy Resin Nanocomposites

Liu,

Gao,

Guo

et al. 2024

Polymers

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The long-term operation of motors induces substantial alterations in the surface conductivity and nonlinear coefficient of anti-corona paint, diminishing its efficacy and jeopardizing the longevity of large motors. Hence, the development of high-performance anti-corona paint holds paramount importance in ensuring motor safety. In this study, we integrate two nano-fillers, namely silicon carbide (SiC) and organic montmorillonite (O-MMT), into a composite matrix comprising micron silicon carbide and epoxy resin (SiC/EP). Subsequently, three distinct types of anti-corona paint are formulated: SiC/EP, Nano-SiC/EP, and O-MMT/SiC/EP. Remarkably, O-MMT/SiC/EP exhibits a glass transition temperature about 25 °C higher than that of SiC/EP, underscoring its superior thermal properties. Moreover, the introduction of nano-fillers markedly augments the surface conductivity of the anti-corona paint. Aging tests, conducted across varying temperatures, unveil a notable reduction in the fluctuation range of surface conductivity post-aging. Initially, the nonlinear coefficients exhibit a declining trend, succeeded by an ascending trajectory. The O-MMT/SiC/EP composite displays a maximum nonlinearity coefficient of 1.465 and a minimum of 1.382. Furthermore, the incorporation of nanofillers amplifies the dielectric thermal stability of epoxy resin composites, with O-MMT/SiC/EP showcasing the pinnacle of thermal endurance. Overall, our findings elucidate the efficacy of nano-fillers in enhancing the performance and longevity of anti-corona paint, particularly highlighting the exceptional attributes of the O-MMT/SiC/EP composite in bolstering motor safety through improved thermal stability and electrical properties.

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Section: Introductionmentioning

confidence: 99%