Ruthenium clusters in lead-borosilicate glass in thick film resistors
| Autor: | Sadahiro lida, Kazuhide Hayashi, Kenji Adachi |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Materials science
Borosilicate glass Mechanical Engineering Analytical chemistry chemistry.chemical_element Condensed Matter Physics Quantitative Biology::Genomics Condensed Matter::Disordered Systems and Neural Networks Ruthenium Condensed Matter::Soft Condensed Matter Condensed Matter::Materials Science chemistry Mechanics of Materials Aluminium Phase (matter) General Materials Science Crystallite Dispersion (chemistry) High-resolution transmission electron microscopy Lead oxide |
| Zdroj: | Journal of Materials Research. 9:1866-1878 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.1994.1866 |
| Popis: | An interparticle glass matrix in ruthenium dioxide-based thick film resistors has been studied intensively by means of analytical and high resolution transmission electron microscopy. The ruthenium dioxide phase interacts with lead-borosilicate glass at high temperature by dissolving ruthenium ions and incorporating a small number of lead and aluminum ions on the surface. Ruthenium ions diffuse through the glass network at least over a distance of 1 μm during firing, but are accommodated in the glass structure by an amount only less than 7 at. % at room temperature. High resolution electron microscopy reveals numerous ruthenium-pyrochlore crystallites in high-lead glasses, but hardly any Ru-based clusters/crystallites in low-lead glasses, where lead-rich glass clusters due to glass immiscibility and reduced lead metal clusters are more commonly observed instead of ruthenium clusters. Lead oxide is prone to reduction both in high- and low-lead glasses upon irradiating with a high-energy incident electron beam. Comparison with gold-based resistor and estimation of average dispersion length of ruthenium clusters, 2 to 4 nm, prefer the model of electron hopping via ruthenium clusters/crystallites as a dominant conduction mechanism in thick film resistors. |
| Databáze: | OpenAIRE |
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