Detection of capacitor electrolyte residues with FTIR in failure analysis

Shrivastava, Anshul; Bangerth, Stefan; Azarian, Michael H.; Morillo, Carlos; Pecht, Michael; Levin, Mark A.; Steinhardt, Larry; Callini, Andrew

doi:10.1007/s10854-013-1146-x

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…The actual temperature of the capacitor element can be greater than the ambient temperature due to the temperature rise in applications with ripple current. Wear-out can also be accelerated by high internal pressure caused by gas generation from excessive leakage current or attack of the cathode foil by electrolyte (oxide breakdown, which is mainly observed under electrical overstress conditions) [21][22][23][24][25][26]. Table 1 summarizes the major failure causes, mechanisms and modes of aluminum electrolytic capacitors and metallized film capacitors, mainly concerned with the field aging or application phase of capacitors.…”

Section: Electrolytic Capacitorsmentioning

confidence: 99%

A Review of Degradation Behavior and Modeling of Capacitors

Gupta

Yadav

DeVoto

et al. 2018

ASME 2018 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystem

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This paper firstly reviews the failure causes, modes and mechanisms of two major types of capacitors used in power electronic systems — metallized film capacitors and electrolytic capacitors. The degradation modeling related to these capacitors is then presented. Both physics-of-failure and data-driven degradation models for reliability and lifetime estimation are discussed. Based on the exhaustive literature review on degradation modeling of capacitors, we provide a critical assessment and future research directions.

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Section: Electrolytic Capacitorsmentioning

confidence: 99%

A Review of Degradation Behavior and Modeling of Capacitors

Gupta

Yadav

DeVoto

et al. 2018

ASME 2018 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystem

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“…Consequently, capacitors suffer from some issues derived from their use. The performance of capacitors can be affected by the mere effect of leaking of the electrolyte due to rupture of the device's casing [2][3][4]. Additionally, as a result of their construction, electrolytic capacitors are bipolar.…”

Section: Introductionmentioning

confidence: 99%

On the Interaction between PEDOT:PSS Dispersions and Aluminium Electrodes for Solid State Electrolytic Capacitors

Calabia Gascón,

Revilla,

Wouters

et al. 2024

Inorganics

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The use of conductive polymers in aluminium electrolytic capacitors prevents leakage and enlarges the temperature use range when compared with their liquid counterparts. PEDOT:PSS is an outstanding candidate due to its tunable properties, i.e., electronic conductivity (10−5 to 103 S/cm), and its high thermal stability. As a result of their synthesis, PEDOT:PSS dispersions are characterized by a low pH value, which can influence pH sensitive materials such as aluminium. However, no work to date has studied the interaction between PEDOT:PSS dispersions and aluminium oxide substrates. In this work, the interface and interaction between PEDOT:PSS and an aluminium electrode were studied for the first time via odd random phase electrochemical impedance spectroscopy and analysed post mortem by SEM and AFM characterization. PEDOT:PSS dispersions at different pH values (1.9, 4.9, 5.8) were applied in a layered manner onto a non-etched aluminium substrate with a grown oxide layer on top, which provided a model system for the analysis of the interface. The analysis showed that the acidic PEDOT:PSS dispersions attacked the aluminium substrate, forming pores on the surface, but had a positive impact on the capacitance of the aluminium oxide/PEDOT:PSS systems. On the other hand, neutral dispersions did not affect the aluminium electrode, but showed poor layer formation properties, and the electrochemical analysis displayed a dispersion of results ranging from capacitive to resistive behaviour.

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“…Thus, the ESR of a capacitor is an important performance parameter. [7][8][9][10] At present, a nominal ESR value provided by an electrolytic capacitor manufacturer is measured at 120 Hz. The measurement is performed by using a constant sinusoidal voltage source, which serves as an excitation applied to the capacitor, then the amplitude and phase position of the response current is measured.…”

Section: Introductionmentioning

confidence: 99%