Features

AgZnO is one kind of electrical contact materials that ZnO (powder, whisker or fiber) dispersed or directional distributed in silver matrix. It has the following merits:
1.The material has better thermal stability than AgSnO2. The reinforced phase (ZnO) is not easy to decompose in medium or heavy current for it has high melting point and decomposition temperature (Td>2000℃).
2.Excellent fusion welding resistance. The reinforced phase (ZnO) was dispersed in silver base, which help decrease the current density and reduce the welding tendency of contact.
3.Low but stable contact resistance.
4.No toxic, pollution-free.

Properties and Application

Materia	Physical properties				Metallography
	Density (g/cm3)	Resistivity (μ Ω·cm)	Hardness
			HB	HV
AgZnO(8)	≥9.50	≤2.60	≥61	≥71
AgZnO(10)	≥9.40	≤2.70	≥64	≥75
AgZnO(12)	≥9.30	≤3.00	≥66	≥77

It is mainly applied to DW17 series conventional circuit breakers, low power circuit breaker and motor starter etc.