MICROVARISTOR-BASED POWDER OVERVOLTAGE PROTECTION DEVICES AND A METHOD FOR PRODUCING A POWDER THEREFOR

MICROVARISTOR-BASED POWDER OVERVOLTAGE PROTECTION DEVICES AND A METHOD FOR PRODUCING A POWDER THEREFOR

A method is disclosed for producing a non-linear powder having microvaristor particles which have a non-linear current-voltage characteristic. The production steps includes mixing non-metallic particles with the microvaristor particles, thermally treating the non-metallic particles for decomposing t...

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Hauptverfasser: HOIDIS, MARKUS, DONZEL LISE
Format: Patent
Sprache:eng ; fre ; ger
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
RESISTORS
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creator HOIDIS, MARKUS
DONZEL LISE
description A method is disclosed for producing a non-linear powder having microvaristor particles which have a non-linear current-voltage characteristic. The production steps includes mixing non-metallic particles with the microvaristor particles, thermally treating the non-metallic particles for decomposing them into electrically conductive particles and fusing the electrically conductive particles onto the microvaristor particles. Embodiments, among other things, relate to: breaking up agglomerates of the non-metallic particles during mixing; keeping the decomposition temperature below a sintering or calcination temperature of the microvaristor particles; and choosing micron-sized or nano-sized non-conductive particles for microvaristor decoration. The production method produces varistor powder with improved reproducibility of the non-linear electric current-voltage characterstic and with reduced switching fields (Es).
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
RESISTORS
title MICROVARISTOR-BASED POWDER OVERVOLTAGE PROTECTION DEVICES AND A METHOD FOR PRODUCING A POWDER THEREFOR
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