【摘要】：隨著電力工業(yè)的迅速發(fā)展,氧化鋅避雷器除具有優(yōu)良的可靠性之外,人們還對(duì)其的經(jīng)濟(jì)性、小型化等的要求越來(lái)越高。作為氧化鋅避雷器核心部件的氧化鋅電阻片,高電位梯度、高電氣性能為人們研究的焦點(diǎn)。氧化鋅電阻片是以配方為基礎(chǔ),靠工藝保證來(lái)實(shí)現(xiàn)。電阻片的電氣性能主要取決于合成電阻片的材料成分、制造工藝和陶瓷體顯微結(jié)構(gòu)。本論文在確定高梯度氧化鋅電阻片新配方前提下,分析了氧化鋅電阻片成型和燒成工藝過(guò)程中影響其電氣性能的種種因素,改善工藝,提高氧化鋅電阻片電位梯度,保證各種電氣性能的可靠性。首先,研究了氧化鋅高梯度電阻片成型工藝缺陷產(chǎn)生原因,通過(guò)對(duì)比分析常規(guī)電位梯度為200V/mm的氧化鋅電阻片成型工藝缺陷產(chǎn)生的原因,研究成型工藝對(duì)缺陷的影響,優(yōu)化成型工藝,合理選擇成型設(shè)備和控制成型粉料顆粒質(zhì)量指標(biāo),探究成型機(jī)理、缺陷影響機(jī)理,確定最佳成型工藝。其次,研究氧化鋅高梯度電阻片燒成工藝缺陷產(chǎn)生原因,通過(guò)對(duì)比分析常規(guī)電位梯度為200V/mm的氧化鋅電阻片燒成工藝缺陷產(chǎn)生的原因,研究燒成氣氛、時(shí)間、溫度、速度等燒成工藝對(duì)缺陷的影響,通過(guò)微觀(guān)分析,探究燒成機(jī)理、缺陷影響機(jī)理,確定最佳燒成工藝。最后,測(cè)試了氧化鋅電阻片的電氣性能。分析總結(jié)常規(guī)氧化鋅電阻片和高梯度氧化鋅電阻片成型工藝和燒成工藝對(duì)缺陷機(jī)理的影響,研究了成型和燒結(jié)工藝對(duì)高梯度氧化鋅電阻片的影響規(guī)律,增加電阻片單位厚度晶界層的數(shù)量是提高高梯度氧化鋅電阻片的關(guān)鍵。
[Abstract]:With the rapid development of electric power industry, in addition to the excellent reliability of zinc oxide arrester, the demand for its economy and miniaturization is more and more high. As the core component of zinc oxide arrester, high potential gradient and high electrical performance are the focus of research. Zinc oxide resistor is based on the formula, by the process assurance to achieve. The electrical properties of the resistor are mainly determined by the composition of the composite resistor, the manufacturing process and the microstructure of the ceramic body. In this paper, on the premise of determining the new formula of high gradient zinc oxide resistor, the factors that affect its electrical properties in the forming and sintering process of zinc oxide resistor sheet are analyzed, and the process is improved, and the potential gradient of zinc oxide resistor sheet is increased. Ensure the reliability of various electrical properties. First of all, the causes of the defects in zinc oxide high gradient resistor sheet forming are studied. By comparing and analyzing the causes of the forming defects of the zinc oxide resistor sheet with a conventional potential gradient of 200V / mm, the influence of the forming process on the defects is studied. Optimization of molding technology, reasonable selection of molding equipment and control of the quality index of powder particles, investigation of forming mechanism, defect influence mechanism, and determination of the best molding process. Secondly, the causes of the defects in the sintering process of zinc oxide high gradient resistor sheet are studied. By comparing and analyzing the causes of the defects in the sintering process of the zinc oxide resistor sheet with a conventional potential gradient of 200V / mm, the sintering atmosphere, time and temperature are studied. The influence of velocity isothermal sintering process on defects was studied by microcosmic analysis, and the optimum sintering process was determined by probing into the mechanism of sintering and the influence mechanism of defects. Finally, the electrical properties of zinc oxide resistor are tested. The effects of conventional zinc oxide resistor sheet and high gradient zinc oxide resistor sheet and sintering process on defect mechanism were analyzed and summarized. The influence of molding and sintering process on high gradient zinc oxide resistor sheet was studied. Increasing the number of grain boundary layers per unit thickness of the resistor is the key to improve the high gradient zinc oxide resistor.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM862

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本文編號(hào)：2122782