TiO<sub>2</sub>/环氧复合材料脉冲真空沿面闪络特性

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Abstract In this article, in order to study the effect of micro TiO₂ filler on the pulsed vacuum surface flashover characteristics of the epoxy composites and find out the work mechanism of some related factors, micro TiO₂ is loaded into epoxy. Six kinds of samples with different filler contents are prepared. Their vacuum surface flashover voltages under the 30ns(rise time)/200ns (half-height width time) single-pulse are measured, and their dielectric spectrum and thermally stimulated depolarization current(TSDC) are also carried out. Results show that the filler content has a visible effect on the flashover voltage of the TiO₂/epoxy composite material, but there is not linear relation between them. Moreover, the dielectric constant and electrical conductivity of the samples both increase with the increase of the filler content. It is also observed that there are both shallow and deep traps in all the samples, and the regularities of shallow trap and deep trap are different as the function of filler content. According to the experimental results, it is summarized that no one of the parameters studied in the paper is the only the factor that determines the pulsed vacuum surface flashover characteristics of the TiO₂/epoxy composites, and the surface flashover experiment results can be well explained with the model of shallow and deep traps for surface flashover. Furthermore, some improvement of the model is carried out. It is presented that the weakening effect of the shallow trap on the flashover strength is dominative when the filler content is small, whereas the enhancing effect of the deep trap

Key words： TiO epoxy composites surface flashover dielectric spectrum thermally stimulated depolarization current shallow and deep traps

Received: 14 October 2009 Published: 20 March 2014

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[1] Miller H C. Flashover of insulators in vacuum review of the phenomena and techniques to improve holdoff voltage [J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1993, 28(4): 512-527.
[2] Sudarshan T S, Li C R. Dielectric surface flashover in vacuum experimental design issues[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1997, 4(5): 657-662.
[3] Stygar W A, Lott J A, Wagoner T C, et al. Improved design of a high-voltage vacuum-insulator interface[J]. Physical Review Special Topics Accelerators and Beams, 2005 8: 050401.
[4] Tanaka T. Dielectric nanocomposites with insulating properties[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2005, 12(5): 914-928.
[5] Tanaka T, Montanari G C, Mulhaupt R. Polymer nanocomposites as dielectrics and electrical insulation-perspectives for processing technologies, material characterization and future applications[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(5): 763-784.
[6] Nelson J K, Hu Y. Nanocomposite dielectrics- properties and implications[J]. Journal of Physics D: Applied Physics, 2005, 38(2): 213-222.
[7] Frechette M F, Trudean M L. Introductory remarks on nanodielectrics [J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(5): 808-818.
[8] Roth I, Ashby S, Childers K, et al. Advanced simulator insulator program second annual report[R]. Defense Nuclear Agency Technical Report, 1996, DNA 001-93-C-0224.
[9] Roth I, Sincerny P, Mandelcon L, et al. Vacuum insulator coating development[C]. Proceedings of the 11th IEEE International Pulsed Power Conference, Baltimore, Maryland, USA, 1997:537-542.
[10] Chantrenne S and Sincerny P. Update of the lifetime performance of Dendresist vacuum insulator coating[C]. The 12th IEEE International Pulsed Power Conference, Monterey, CA, USA, 1999: 1403-1406.
[11] 赵文彬, 张冠军, 严璋. 复合材料的陷阱参数对其在真空中高压脉冲下沿面闪络特性的影响[J]. 中国电机工程学报, 2007, 27(9): 11-17.
[12] Cheng Y H, Chen Y, Tang J P, et al. Study on the vacuum surface flashover characteristics of epoxy composites with different fillers under steep high-voltage impulse[C]. The 9th IEEE International Conference on Solid Dielectrics, UK, Winchester, 2007: 349-352.
[13] 丁曼, 成永红, 阴玮, 等. 真空ns脉冲下环氧复合材料表面电荷特性[J]. 高电压技术, 2009, 35(1): 157-163.
[14] Chen Y, Cheng Y H, Wu K, et al. Flashover characteristic of epoxy composites filled with different micro inorganic oxide particles under nanosecond pulse in vacuum[J]. IEEE Transactions on Plasma Science, 2008, 37(1): 195-204.
[15] Lei Q Q, Wang X, Fan Y. A new method of auto-separating thermally stimulated current [J]. Journal of Applied Physics, 1992, 72(9): 4254-4257.
[16] Chen Y, Cheng Y H, Tang J P, et al. Experiments and simulations on influencing factors of pulsed surface flashover in vacuum[C]. The 9th IEEE Inter-national Conference on Solid Dielectrics, UK, Winchester, 2007: 345-348.