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1993
Conference Paper
Titel
Influence of the solid particle size on the properties of RuO2-based thick film resistors
Alternative
Einfluß der Korngröße der Feststoffe auf die Eigenschaften von RuO2-Dickschichtwiderständen
Abstract
RuO2-based thick film pastes with 'non-reducible' glass (without lead oxide) can also react with AlN during firing. In the presence of glass RuO2 can be oxidized by AlN and the resistor layers bubble. To minimize this reaction respectivily to avoid the blistering the resistor pastes contain above mentioned glass with higher viscosity and inert components. The powder properties influence the porosity, the electrical behaviour and the stability of the resistors. The correlation between particle size and resistivity can be explained by the chain and ring model of conductive pathes. Because of the high glass viscosity during firing the interaction between glass and RuO2 is very small and therefore hardly influenses the conduction mechanism.