Abstract
After long-term high-temperature firing, the conductive phase in thick film resistors based on RuO 2 remains unchanged. In contrast, ruthenates decompose, presumably due to interactions with the silica-rich glass phase. Subsolidus equilibria in the PbO-poor part of the RuO 2–PbO–SiO 2 diagram were studied with the aim of investigating possible interactions between the conductive phase (either ruthenium oxide or lead ruthenate) and silica-rich glasses in thick-film resistors. The tie lines are between Pb 2Ru 2O 6.5 and PbSiO 3, and between RuO 2 and PbSiO 3. This indicates that the lead ruthenate is not stable in the presence of the silica-rich glass phase.
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