提高ZnO非线性电阻能量吸收均匀性的研究

ZnO nonlinear varistor is an important device to guarantee the safe operation of power system and electronic system. How to improve the uniformity of energy absorption capability of ZnO varistor and increase its energy absorption capability, is a studying project in the world. At present, with the development of electronics and microelectronics, the system or devices with electronic and microelectronic components has weak withstand capability to electromagnetic interference, it is meaningful to study ZnO varistor with high energy absorption capability and small size. Voronoi network is used to analyze the electric characteristics and study the energy absorption uniformity of ZnO varistor from the microstructure, some instructive conclusions to the sample sintering were obtained from simulation analysis. By analyzing ZnO varistor samples obtained by different additive components, different sample sintering and raw material preparation techniques, the suitable additive components, sample sintering and raw material preparation techniques for ZnO varistors with high energy absorption uniformity were obtained. Comparing with old techniques, the 2ms square-wave capability of the ZnO varistor sample ofφ32×24mm sintered with the new technique is improved from 150A (18 times) to 350A (18 times), which has been increased 130%, and the voltage gradient of the sintered samples of φ32×16mm reach 416V/mm. The performance of the developed Zn varistor samples exceeds that of the most advanced ZnO varistor in the world, which is made in Japan, and reaches the international advanced level. The research achievement of this project has the value to be promoted, it will generate huge economic effectiveness.

提出从微观角度研究提高ZnO非线性电阻能量吸收均匀性的新方法。通过对模拟ZnO电阻微观结构的三维非线性电阻网络的数值计算和对不同添加成份及不同烧结和处理工艺的ZnO电阻返牟馐苑治觯呕玫教岣遉nO电阻能量吸收能力的措施。更好保护电力及电子系统的可靠运行。为国内外首次提出，是一个即注重基础理论探索又结合实际应用的研究项目。