本文選題：油紙絕緣　切入點：納米復(fù)合電介質(zhì)　出處：《中國電機工程學(xué)報》2017年14期 　論文類型：期刊論文

【摘要】：為研究陷阱參數(shù)對納米氧化鋁(Al_2O_3)改性絕緣紙板介電特性的影響,該文利用實驗室小型造紙設(shè)備制備出納米Al_2O_3改性紙板,研究了其介電特性隨納米摻雜比例的變化規(guī)律。借助熱刺激電流(thermally stimulated current,TSC)法測量了不同納米摻雜比例下改性紙板的陷阱參數(shù);通過建立纖維素中納米顆粒的多核模型,分析了陷阱參數(shù)對改性紙板介電特性的影響機理。試驗結(jié)果表明:改性紙板的電導(dǎo)率、相對介電常數(shù)及介質(zhì)損耗因數(shù)隨納米摻雜比例的上升先減小后增大,而直流擊穿場強則先增大后減小,并在摻雜比例為2.5%時出現(xiàn)最大值;同時,其電導(dǎo)率在高摻雜比例下隨電場強度的增加表現(xiàn)出明顯的非線性特性;借助能帶理論分析得出,改性紙板體系中陷阱深度與陷阱密度隨納米摻雜比例的上升呈先增大后減小的趨勢,與熱刺激電流測試結(jié)果相符,且隨陷阱深度和密度的增加,改性紙板擊穿場強上升、電導(dǎo)率下降。以上結(jié)果表明,陷阱參數(shù)是影響改性紙板介電特性變化的主要原因。
[Abstract]:In order to study the effect of trap parameters on dielectric properties of modified insulating paperboard modified by Al _ 2O _ 3 / Al _ 2O _ 3 / Al _ 2O _ 3 / Al _ 2O _ 3 / Al _ 2O _ 3 / Al _ 2O _ 3 / Al _ 2O _ 3 / Al _ 2O. The variation of dielectric properties with nano-doping ratio was studied. The trap parameters of modified paperboard with different nano-doping ratios were measured by thermally stimulated current (thermally stimulated) method, and the multicore model of nano-particles in cellulose was established. The effect of trap parameters on the dielectric properties of modified paperboard was analyzed. The experimental results showed that the conductivity, relative dielectric constant and dielectric loss factor of modified paperboard decreased first and then increased with the increase of nano-doping ratio. The DC breakdown field strength first increases and then decreases, and the maximum value occurs when the doping ratio is 2.5. At the same time, the conductivity shows obvious nonlinear characteristics with the increase of the electric field intensity under the high doping ratio. In the modified paperboard system, the trap depth and the trap density increased first and then decreased with the increase of nano-doping ratio, which were consistent with the results of the thermal stimulation current test, and the breakdown field strength of the modified paperboard increased with the increase of the trap depth and density. The results show that the trap parameter is the main reason for the change of dielectric properties of modified paperboard.
【作者單位】： 工程電介質(zhì)及其應(yīng)用教育部重點實驗室(哈爾濱理工大學(xué));國網(wǎng)黑龍江省電力科學(xué)研究院;
【基金】：國家自然科學(xué)基金項目(51407051,51677046) 黑龍江省自然科學(xué)基金資助(ZD201310)~~
【分類號】：TM215.6

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相關(guān)期刊論文 前10條

1 廖瑞金;劉團;楊麗君;呂程;吳偉強;;納米改性纖維素絕緣紙在直流場中的空間電荷分布特性[J];高電壓技術(shù);2015年09期

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3 王旗;李U，

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