Recycling zinc oxide varistor blocks for electro-active silicone composites

Renaud Metz (1) , Loic Boudehen , Said Tahir (1) , Ty Phou (1) , Guillaume Prevot (1) , Remi Jelinek (1) , Philippe Dieudonne-George (1) , Merdad Hassanzadeh

1 L2C - Laboratoire Charles Coulomb

The recycling process toward the elimination of varistor wastes into new electro-active silicon composites has been investigated. We studied the dependence of the E-J characteristics on the aggregate content in the polymer matrix. Formulations with 40 vol.% metal oxide varistor aggregates in the 100-200m range exhibit reliable nonlinear behavior with a switching voltage of 280 +/- 30V/mm. The breakdown voltage of the composite decreases as both filler's diameter and filler's volume fraction increases in the 550-220V/mm and 440-280V/mm range, respectively. This paves the way for the valorization of varistors based zinc oxide (ZnO) ceramics.

Mots clés: composite; microvaristor; metal oxide varistor; silicone; varistor

Domaines: Matériaux

Renaud Metz, Loic Boudehen, Said Tahir, Ty Phou, Guillaume Prevot, et al.. Recycling zinc oxide varistor blocks for electro-active silicone composites. International Journal of Applied Ceramic Technology, 2017, 14 (2), pp.274-281. ⟨10.1111/ijac.12637⟩. ⟨hal-01517065⟩