在研究的早期阶段,ZnO变阻器在承受高电流过载时,I—V特性的老化超过10％—20％。但是,变阻器的应用要求一个可靠的变阻器的I—V特性,在使用时期和经受了由于吸收了下一个过载而产生的电负荷之后,必须保持其恢复原值的稳定能力。 为了弄清变阻器可靠性的物理和化学,首先必须了解稳定的和不稳定的变阻器之间的差别,之后才能尝试研究变阻器老化模式和它的可能解释。 In the early stages of research, ZnO varistors aged more than 10% -20% of I-V properties under high current overload. However, rheostat applications require a reliable I-V characteristic of varistors that must maintain its ability to recover to its original value during service life and after being subjected to an electrical load resulting from the absorption of the next overload. In order to understand the physics and chemistry of rheostat reliability, it is first necessary to understand the differences between stable and unstable varistors before attempting to study rheostat aging patterns and its possible explanation.