Synthesis of silver tin oxide nanocomposite powders
via chemical coprecipitation method
سنتز پودرهای نانوکامپوزیت نقره-اکسید قلع از روش هم رسوبی شیمیایی
ABSTRACT
Introduction : Silver-metal oxide composite contact materials have a variety of applications in low voltage switches such as relays, contactors and circuit breakers . Until three decades ago, Ag-CdO composite was the preferred material for these usages due to excellent functional and technological properties. However, because of toxic nature of Cd, especially when it is evaporated, consider- able efforts have been made to replace it with environ-ment-friendly substances such as Ag-SnO2. Ag-SnO2 materials, in addition, have higher hardness, contact resistance and temperature rise than Ag-CdO substances. Besides their arc erosion and anti-welding properties are excellent.