高梯度氧化锌电阻片成型与烧成工艺的研究

发布时间：2018-07-14 19:57

【摘要】：随着电力工业的迅速发展,氧化锌避雷器除具有优良的可靠性之外,人们还对其的经济性、小型化等的要求越来越高。作为氧化锌避雷器核心部件的氧化锌电阻片,高电位梯度、高电气性能为人们研究的焦点。氧化锌电阻片是以配方为基础,靠工艺保证来实现。电阻片的电气性能主要取决于合成电阻片的材料成分、制造工艺和陶瓷体显微结构。本论文在确定高梯度氧化锌电阻片新配方前提下,分析了氧化锌电阻片成型和烧成工艺过程中影响其电气性能的种种因素,改善工艺,提高氧化锌电阻片电位梯度,保证各种电气性能的可靠性。首先,研究了氧化锌高梯度电阻片成型工艺缺陷产生原因,通过对比分析常规电位梯度为200V/mm的氧化锌电阻片成型工艺缺陷产生的原因,研究成型工艺对缺陷的影响,优化成型工艺,合理选择成型设备和控制成型粉料颗粒质量指标,探究成型机理、缺陷影响机理,确定最佳成型工艺。其次,研究氧化锌高梯度电阻片烧成工艺缺陷产生原因,通过对比分析常规电位梯度为200V/mm的氧化锌电阻片烧成工艺缺陷产生的原因,研究烧成气氛、时间、温度、速度等烧成工艺对缺陷的影响,通过微观分析,探究烧成机理、缺陷影响机理,确定最佳烧成工艺。最后,测试了氧化锌电阻片的电气性能。分析总结常规氧化锌电阻片和高梯度氧化锌电阻片成型工艺和烧成工艺对缺陷机理的影响,研究了成型和烧结工艺对高梯度氧化锌电阻片的影响规律,增加电阻片单位厚度晶界层的数量是提高高梯度氧化锌电阻片的关键。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM862

【共引文献】