Polymer compound with nonlinear current-voltage characteristic and process for producing a polymer compound
View Patent ↗The polymer compound contains a polymer matrix and a filler embedded in the matrix. The filler comprises two filler components with nonlinear current-voltage characteristics deviating from one another. By selection of suitable amounts of these filler components, a polymer compound with a predetermined nonlinear current-voltage characteristic deviating from these two characteristics can be formed in this way.
1. A voltage-dependent polymer compound with a nonlinear current-voltage characteristic comprising a polymer matrix and a filler with a nonlinear current-voltage characteristic embedded in the matrix, wherein the filler comprises at least two filler components with nonlinear current-voltage characteristics deviating from one another, and the two filler components are formed by particles having particle sizes in a predetermined single particle size range containing a doped, sintered metal oxide with grain boundaries and having the same composition, the two filler components differing from one another by grain boundary structures deviating from one another and caused by different sintering conditions.
2. The polymer compound of claim 1 , wherein the single particle size range is about 32 μm to about 125 μm.