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.
Novel method for preparation of silver-tin oxide electrical contacts
روش جدیدی برای تولید کنتاکتهای الکتریکی نقره-اکسید قلع
ABSTRACT
Introduction : MOST of the electrical contact materials in use today contain cadmium oxide particles that are volatile and toxic. Because of the fact that vaporization of cadmium oxide during switching could be detrimental to workers' health, its use in contact mate- rials has been banned by health organizations in some other countries. To replace the cadmium oxide, many foreign compa- nies have utilized tin oxide in silver electrical contacts.