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您的检索式：作者名="Zikui Shen"
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| 1 | A fabrication method for adaptive dielectric gradient insulating components显示文摘Dielectric gradient components have advantages in electric field mitigation and insulation improvement.In this paper,we propose a fabrication method for adaptive dielectric gradient components using in situ AC electric field,including the mechanism and the corresponding operational procedures for industrial applications.Based on the electric polarisation and self-assembly effect of the filler particles in the liquid matrix,the chainlike structure in the high field strength region is constructed to enhance the local permittivity and mitigate the maximum of the spatial electric field.The dielectric gradient basin insulator is prepared by this method,and its flashover voltage is increased by 12.8%compared with that of a homogeneous dielectric basin insulator,and the improvement is 20.8%when metal particles are present on the surface.The more non-uniform the initial electric field is,the greater the improvement in flashover voltage.This method is expected to promote the industrial application of dielectric gradient insulating components. | Zikui Shen Zhidong Jia Yanpeng Hao Zhenyu Xin Xilin Wang | 2023 | High Voltage2023，8，1： | 2 |
| 2 | Analytical model for the transient permittivity of uncured TiO_(2) whisker/liquid silicone rubber composites under an AC electric field显示文摘The electric field grading of dielectric permittivity gradient devices is an effective way of enhancing their insulation properties.The in situ electric field‐driven as-sembly is an advanced method for the fabrication of insulation devices with adaptive permittivity gradients;however,there is no theoretical guidance for design.In this study,an analytical model with a time constant is developed to determine the transient permittivity of uncured composites under an applied AC electric field.This model is based on optical image and dielectric permittivity monitoring,which avoids the direct processing of complex electrodynamics.For a composite with given components,the increased filler content and electric field strength can accelerate the transient process.Compared with the finite element method based on differential equations,this statistical model is simple but efficient,and can be applied to any low‐viscosity uncured composites,which may contain multiple fillers.More importantly,when a voltage is applied to an uncured composite insulating device,the proposed model can be used to analyse the spatiotemporal permittivity characteristics of this device and optimise its permittivity gradient for electric field grading. | Zikui Shen Zhenyu Xin Xilin Wang Xinyu Wei Zhidong Jia | 2021 | High Voltage2021，6，3： | 1 |
| 3 | Dielectric barrier discharge-based defect engineering method to assist flash sintering显示文摘Oxygen vacancy OV plays an important role in a flash sintering (FS) process. In defect engineering, the methods of creating oxygen vacancy defects include doping, heating, and etching, and all of them often have complex processes or equipment. In this study, we used dielectric barrier discharge (DBD) as a new defect engineering technology to increase oxygen vacancy concentrations of green billets with different ceramics (ZnO, TiO_(2), and 3 mol% yttria-stabilized zirconia (3YSZ)). With an alternating current (AC) power supply of 10 kHz, low-temperature plasma was generated, and a specimen could be treated in different atmospheres. The effect of the DBD treatment was influenced by atmosphere, treatment time, and voltage amplitude of the power supply. After the DBD treatment, the oxygen vacancy defect concentration in ZnO samples increased significantly, and a resistance test showed that conductivity of the samples increased by 2–3 orders of magnitude. Moreover, the onset electric field (E) of ZnO FS decreased from 5.17 to 0.86 kV/cm at room temperature (RT);while in the whole FS, the max power dissipation decreased from 563.17 to 27.94 W. The defect concentration and conductivity of the green billets for TiO_(2) and 3YSZ were also changed by the DBD, and then the FS process was modified. It is a new technology to treat the green billet of ceramics in very short time, applicable to other ceramics, and beneficial to regulate the FS process. | Xinhao Zhao Nianping Yan Yueji Li Zikui Shen Rongxia Huang Chen Xu Xuetong Zhao Xilin Wang Ruobing Zhang Zhidong Jia | 2023 | Journal of Advanced Ceramics2023，12，5： | 0 |
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