Developments in Electrolytic Capacitors

Abstract

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Visual Detection of Hydrated Aluminum Oxide by Staining with Fluorescing and Nonfluorescing Dyes

“…In other words, because of the porous nature of the h ydrous oxide a gain of 58 was built into the test. The other surfaces such as the passivation layer (1) and barrier anodic oxide (17) are nonporous.…”

A Century of Dielectric Science and Technology

“…6 The electrolytic aluminum foil capacitor, which invoked a dielectric oxide film on the anode, was important for capacitor applications in the 1950s and most of the 1960s. 7 In this regard, it is interesting to note that in 1967, the first proceedings volume with EID as the lead Division was published: ''Electrolytic Rectification and Conduction Mechanisms in Anodic Oxide Films,'' edited by P. F. Schmidt and D. M. Smyth. In the 1960s, capacitors were fabricated from paper-impregnated with mineral oils or PCBs, as well as polypropylene, but the introduction of ceramic solid electrolyte materials such as tantalum oxide, alumina, and silica, dominated the market in the late 1960s and 1970s.…”

“…In the 1960s, capacitors were fabricated from paper-impregnated with mineral oils or PCBs, as well as polypropylene, but the introduction of ceramic solid electrolyte materials such as tantalum oxide, alumina, and silica, dominated the market in the late 1960s and 1970s. 6,7 By the late 1970s, popular formation methods for these oxides involved anodization and sputtering. 6 Significant efforts to establish a fundamental understanding of the quintessential dielectric in silicon-based ICs, thermally-grown SiO 2 , began in the mid 1960s.…”

Symmetric Pulsed Anodizing of Aluminum Foil for Aluminum Electrolytic Capacitors

“…As a major branch of the capacitor field, aluminum electrolytic capacitors own a large volume specific capacitance, high cost performance, and easy assembly compared with those of supercapacitors (SCs) and secondary batteries (SBs), which have been widely applied in various electronic system as power filter, signal coupling, clutter bypass, and energy storage. − To meet the demand of rapid development of 3C (computer, communication, and control) technology, aluminum electrolytic capacitors, as the largest and non-integrated component in the circuit, are developing toward the direction of miniaturization, lightweight, high quality, energy conservation, and environmental protection . Generally, aluminum electrolytic capacitor is composed of anode foil, cathode foil, electrolytic paper, and electrolyte .…”