Electrolytic capacitors: their fabrication and the interpretation of their operational behaviour

Non-aqueous electrolyte solutions in chemistry and modern technology

“…low resistivity (300 < Q/(Q cm) < 2000) 707) over a large temperature range, low vapour pressure of the solvent, and sufficient solubility of the electrolyte. Specific compatibility conditions must be fulfilled.…”

The Equivalent Series Resistance in Electrolytic Capacitors

“…where tan 6 o is the loss of the oxide. The two critical frequencies are given by fc, 2zrRpCp (4) fc2 2rCRf (5) Above these frequencies the resistance and capacitance of the transmission line begin to fall with frequency according to f-v2 law.4 The oxide loss is almost frequency independent and thus the resistance Rex is expected to fall linearly with frequency. It is therefore expected that at high frequencies the E.S.R.…”

“…The construction and performance of electrolytic capacitors have been reviewed extensively. [1][2][3][4][5] The most common type of construction consists of an etched aluminium anode and high grain cathode foils separated by electrolyte impregnated low density tissues. The dielectric is provided by the anodization of the anode, and its thickness is determined by the anodization voltage and other anodization parameters, such as temperature and the constituents of the anodization solution.…”

“…8 The use of two transmission line treatment has recently been employed in the analysis of an etched foil electrolytic capacitor. 4 The exact transmission line model is extremely complex for etched foil capacitors. However, many approximations can be introduced without changing the final results drastically.…”

“…In practice, inductance is mainly due to lugs and leads. 4 2) The capacitance of impregnated tissues is insignificant compared with the capacitance of the anode.…”