| Ag-SnO2 electrical contact material has become a new type of environmentally friendly electrical contact material that is most likely to replace the traditional toxic electrical contact material Ag-CdO due to its excellent physical properties, welding resistance and arc ablation resistance. Based on the analysis of more than 40 literatures, the effects of preparation processes including alloy internal oxidation, powder metallurgy, spraying, template method, magnetron sputtering, enhanced phase modification and enhanced phase regulation on the microstructures and properties of Ag-SnO2 electrical contact materials were summarized. A new method of designing and developing new Ag-SnO2 electrical contact materials was proposed, which lays a theoretical and experimental basis for the further optimization of Ag-SnO2 electrical contact materials. |
