Wärmedurchschlag an Cu<sub>2</sub>O

Bäther, K.‐H.

doi:10.1002/crat.19740091113

Cited by 5 publications

(2 citation statements)

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“…Resistive switching transitions have been observed in samples of cuprous oxide produced by the high temperature oxidation of copper in air (19,20,25,26). The schematic steady-state electrical characteristic is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Periodic Phenomena during Anodic Dissolution of Copper at High Current Densities

Cooper

Müller

Tobias

1980

J. Electrochem. Soc.

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Uniform and sustained anode potential oscillations (amplitude, 10-20V) have been observed in galvanostatic dissolution of copper in chlorate electrolyte. The oscillations occur in the current density range of 0.3-150 A/cm 2. Frequency increases with current density in this range from 10 -3 to 103 Hz. Increases in electrolyte temperature, acidity, and flow rate were found to result in a decrease of oscillation frequency. Large amplitude oscillations were also observed in a narrower current density range and with less cycle uniformity, in a variety of mixed electrolytes containing small concentrations of halides. The rise and fall of potential reflects an alternate growth and destruction of an adherent cuprous oxide surface layer. A model for the oscillations is proposed based on resistive switching transitions within the anode surface film.The anodic dissolution of copper in sodium chlorate electrolyte gives rise to a remarkable phenomenon. On applying a constant current to the cell, the anode potential fails to reach a steady level; rather, the potential undergoes a periodic rise and fall of about 10V, as shown by the sample oscillograph recording (Fig. I). The individual cycles are impressively uniform in period and amplitude. Oscillations are found with galvanostatically controlled current densities in the range of 0.3 to over 150 A/era 2. Above approximately 180 A/cm 2, random fluctuations accompanied by gassing and sparking were observed. Frequency increases with 9 Electrochemical Society Active Member.

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Section: Resultsmentioning

confidence: 99%

“…The mechanism for restoring the high resistance state was not identified by the authors, nor was the existence of the filaments verified experimentally. Nevertheless, field-induced insulator-to-conductor transitions are known to occur in a wide variety of materials (18) including cuprous oxide (19,20).…”

Section: Earlier Interpretations Of Periodicitymentioning

confidence: 99%

Periodic Phenomena during Anodic Dissolution of Copper at High Current Densities

Cooper

Müller

Tobias

1980

J. Electrochem. Soc.

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The frequency distribution of the threshold voltage of bistable Cu₂O switching devices

Bäther¹,

Brückner²

1976

Cryst Res and Technol

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The frequency distribution of the threshold voltage of Ag-Cu,O-Ag switching devices was experimentally established. With a few switching cycles (n 5 150) distribution can be interpreted by a numerical Gauss distribution. Only a single, from electrode to electrode uninterrupted, channel is optically provable. A numerical Gauss distribution is usually no longer observed with a larger number of switching cycles. The entire frequency distribution, however, is composed of several partial collectives which can be individually considered as normal distributions. These contribute in differing degrees to the total frequency distribution. Several switching channels can be optically proved. The channels and the normally distributed partial collectives were allocated to one another.

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Experimenteller Nachweis der Temperaturfelder beim Schaltvorgang in Cu₂O und Zeitlupenstudie des thermischen Durchschlages

Bäther¹,

Brückner²

1976

Cryst Res and Technol

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The temperatures before and during the breakdown (switching) in planar Ag-Cu,O-Ag structures were determined experimentally. They were measured by means of liquid crystals and thermo-chromatic cryons as temperature indicators as wcll as measuring the intensity distribution of the emitted IR radiation. Structural changes during electrical switching were observed using a slow-motion camera. The formation of the switching channel and the movement of the liquid phase in i t were observcd. The results show that the elect.rica1 switching is due to a thermal mechanism.

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Wärmedurchschlag an Cu₂O

Cited by 5 publications

References 6 publications

Periodic Phenomena during Anodic Dissolution of Copper at High Current Densities

Periodic Phenomena during Anodic Dissolution of Copper at High Current Densities

The frequency distribution of the threshold voltage of bistable Cu₂O switching devices

Experimenteller Nachweis der Temperaturfelder beim Schaltvorgang in Cu₂O und Zeitlupenstudie des thermischen Durchschlages

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Wärmedurchschlag an Cu2O

Cited by 5 publications

References 6 publications

Periodic Phenomena during Anodic Dissolution of Copper at High Current Densities

Periodic Phenomena during Anodic Dissolution of Copper at High Current Densities

The frequency distribution of the threshold voltage of bistable Cu2O switching devices

Experimenteller Nachweis der Temperaturfelder beim Schaltvorgang in Cu2O und Zeitlupenstudie des thermischen Durchschlages

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Wärmedurchschlag an Cu₂O

The frequency distribution of the threshold voltage of bistable Cu₂O switching devices

Experimenteller Nachweis der Temperaturfelder beim Schaltvorgang in Cu₂O und Zeitlupenstudie des thermischen Durchschlages