Method for the recovery of electronic properties not u00f4hmicas ceramic varistoras (resistors degraded physically nonlinear)

摘要

Process for improvement and recovery of electronic properties not u00f4hmicas ceramics varistoras (nonlinear resistors). The present invention relates to a process for improvement and recovery of the electronic properties not u00f4hmicas ceramics, particularly ceramics vanstoras based metal u00e1xidos.This process enhances the electronic properties not u00f4hmicas ceramics varistoras as obtained during manufacture and retrieves such properties in ceramic pieces that have suffered degradation, both physical and chemical, during use.Both the improvement in the recovery of u00f4hmicas properties of ceramics are made by means of a thermochemical treatment difusional in oxidizing atmosphere, and the ranges of temperature and saturation of oxygen atmosphere, as well as the time of treatment, are paru00e2metr The control of the process.