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Based on the analysis of the sample results, the following conclusions can be drawn: The SnO2 varistor ceramics with superior performance were successfully prepared using chemical grade materials, and the new SnO2 varistor ceramics exhibited excellent nonlinear current-voltage characteristics, both at home and abroad. Compared with the popular ZnO pressure-sensitive material on the market, its performance is higher than the former.
Pressure-sensitive ceramics are non-linear resistance ceramics that are sensitive to voltage changes. At present, there are four major types of varistor ceramics: SiC, TiO2, SrTiO3, and ZnO. However, the application of a wide range of good performance is a zinc oxide varistor ceramics. Because ZnO varistor ceramics exhibit better pressure-sensitive characteristics in power systems and electronics. It is widely used in various devices such as circuits and household appliances, especially in high-performance surge absorption, overvoltage protection, superconductivity, and gapless arresters. Since Japan first used ZnO gapless arresters to replace traditional SiC series gap arresters in the 1970s, research has been carried out in this area both at home and abroad. However, there are limitations in the application of zinc oxide varistor ceramics in high pressure applications. Such as the production of high-voltage arresters, you need a large number of ZnO varistor valve stack, not only increases the product's external dimensions, and high pressure arrester requires a lower residual pressure ratio is also extremely difficult to achieve, for this must research and development of new high performance High pressure varistor ceramic materials. In the past, SnO2 was mainly used as a gas sensitive material. No research has been done for high-performance pressure-sensitive materials. Researchers at Shandong Silicate Research Institute have repeatedly researched and developed a new generation of high-performance varistor ceramic materials to meet the requirements of domestic and foreign markets.