Chemical Compositions

Alloy	Fe	Si	Cu	Mn	Mg	Cr	Zn	Ni	Ti	Other		Al
										Each	Total
1235	0.65		0.05	0.05	0.05	-	0.1	-	0.06	0.05	0.15	99.35

Application		For Electronic Power Capacitor
Alloy		1235
Temper		H18,O
Thickness(mm)		0.0045 ,0.005, 0.0055,0.006
Tolerance		0.0045			±5%
		0.005
		0.0055
		0.006			2%
					-5%
Tolerance of Width(mm)		±0.5
Core (mm)			Φ75			Φ150
Coil O.D.(mm)			≤Φ350			≤Φ550
Core I.D.(mm)		Φ76.2 /150/152.4
Splices		Width	≤300	300~350		≤5
		Splices	≤1	≤2
Mechanical Properties	MPaU.T.S	55100
	% Elongation	≥1.0
Unwinding (m)		≤1
Trace Elements (%)		Pb≤0.01, As≤0.01,Cd≤0.01
Pin holes(m2)	0.0045	≤8000
	0.005	≤4000
	0.0055	≤2000
	0.006	≤1000
Norms & Standards		GB3198

This application of aluminum foil employs not only its good electrical conductivity but also its oxide coating, specially formed (anodized) to make a superior dielectric layer between the two conductors. The dielectric constant of aluminum oxide is higher than that of waxed paper and many other dielectric materials, therefore it can store more electrons per unit of area. The oxide dielectric plate, which determines the size of a given capacitor, does not have to be as large as a paper dielectric "plate" for an equal capacity. Further, the oxide film, even a "thick" one, is thinner than the thinnest tissue paper. This thin film of aluminum oxide reduces the bulk of the capacitor; but more important, its thinness also increases the capacitance per unit of area. Another advantage of aluminum foil for electrolytic capacitors is that the foil is readily etched. This is important because etching greatly increases the true surface area which, when anodized, results in a far larger dielectric plate capacity.

Product list