Suche nach „[Rychkov] [Dmitry]“ hat 106 Publikationen gefunden

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Wang, J., Dmitry Rychkov, Gerhard, R.

Influence of surface modifications with orthophosphoric acid on the charge stability of polypropylene electrets

IEEE Annual Report Conference on Electrical Insulation and Dielectric Phenomena (2016 IEEE CEIDP)

2016

ISBN: 978-1-5090-4654-6

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Altafim, R.A.P.

Polymer Electrets and Ferroelectrets as EAPs: Models" Book chapter in "Electromechanically Active Polymers"

Electromechanically Active Polymers, Cham

2016

ISBN: 978-3-319-31767-0

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Gerhard, R., Kuznetsov, A., Rychkov, A. A.

Energy Spectrum of Surface Traps on Teflon-FEP Films Modified with Titanium-Tetrachloride Vapor

Proceedings of the ICD 2016 1st International Conference on Dielectrics, Montpellier, France

2016

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Gerhard, R., Kuznetsov, A., Rychkov, A. A.

Modelling the Isothermal Charge Decay of Modified PTFE Electrets from their Thermally Stimulated Discharge

IEEE Annual Report Conference on Electrical Insulation and Dielectric Phenomena (2016 IEEE CEIDP)

2016

ISBN: 978-1-5090-4654-6

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Qiu, X., Dmitry Rychkov, Wirges, W.

Properties and Applications of Ferroelectrets

The Nano-Micro Interface, Weinheim, vol. Vol. 1

2015

ISBN: 978-3-527-33633-3

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Wirges, W., Gerhard, R., Altafim, R.A.P.

Unipolar Teflon -FEP Ferroelectrets – Choice of Negative Electret Charge Enhances Stability

IEEE Annual Report Conference on Electrical Insulation and Dielectric Phenomena (2015 IEEE CEIDP)

2015

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Gerhard, R., Ivanov, V., Kuznetsov, A., Rychkov, A. A.

Rubbing Treatment before Chemical Surface Modification Enhances Deep Trapping of Positive Charge on Polytetrafluoroethylene (PTFE) Electrets

IEEE Annual Report Conference on Electrical Insulation and Dielectric Phenomena (2015 IEEE CEIDP)

2015

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Patent

Gerhard, R., Dmitry Rychkov, Wirges, W., et al.

Electromechanical transducer device for use in e.g. actuator device, has electret material having predetermined electrical charge, which is provided between electro-active layers

2015

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Ivanov, V., Rychkov, A. A., Gerhard, R.

Enhanced Stability of Negative Charge on FEP-Copolymer Electrets Treated with TiCl4 Vapor: Voltage-Recovery Experiment

Conference Proceedings of the 15th International Symposium on Electrets

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Altafim, R.A.P., Gerhard, R.

Unipolar ferroelectrets - Following the example of the electret microphone more closely

Annual Report Conference on Electrical Insulation and Dielectric Phenomena (2014 IEEE CEIDP)

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Altafim, R.A.P., Efimov, N., Gerhard, R.

Improved thermal stability of FEP ferroelectrets through inner voids surface modification

Materials of XIII International Conference "PHYSICS OF DIELECTRICS" (DIELECTRICS-2014), vol. Vol. 2

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, M. Khorasani, M. Kollosche, Wirges, W., Gerhard, R.

The Influence of Carbon-Nanotube Electrodes on the Charge Decay in Silicone-Elastomer Films for Electro-Electret Applications

Conference Proceedings of the 15th International Symposium on Electrets

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov

Stabilization of Electric Charges on Self-Organized Nano-Islands

Conference Proceedings of the 15th International Symposium on Electrets

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Rychkov, A. A., Kuznetsov, A., Dmitry Rychkov, Ivanov, V.

Thermal stability of negative homocharge in tetrafluoroethylene-hexafluoropropylene copolymer films

(in Russian)

Proceedings of the XIII International Conference "Physics of Dielectrics", vol. Vol. 2

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Patent

Efimov, N., Y. Julenets, A. Kuznetsov, Dmitry Rychkov, et al.

Method of film electret production involves application of fluoropolymer layer onto metal electrode

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Patent

N. Efimov, V. Ivanov, A. Kuznetsov, Dmitry Rychkov, et al.

Method of film electret production, involves application of fluoropolymer layer onto metal electrode and discrete layer consisting of isolated nano-sized aggregates out of titan-containing nanostructures onto fluoropolymer surface

2014

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Dmitry Rychkov, Wirges, W., Gerhard, R., Rychkov, A. A., A. Malygin, Efimov, N.

Stabilization of Positive Charge on FEP Electret Films Modified with Titanium-Tetrachloride Vapor: Formation of a Two-Dimensional Nanodielectric?

2013 IEEE International Conference on Solid Dielectrics (ICSD)

2013

DOI: 10.1109/ICSD.2013.6619860

Abstract anzeigen

It has been shown recently that the stability of positively corona-charged polytetrafluoroethylene (PTFE) electrets is considerably enhanced as a result of a surface treatment with titanium-tetrachloride (TiCl 4 ) vapor. In the present study, we investigate the influence of a gas-phase treatment with TiCl 4 on the electret properties of tetrafluoroethylene-hexafluoropropylene copolymer (FEP) films. FEP-film samples were treated with titanium-tetrachloride vapor by means of a nanotechnological chemical process that is based on molecular-layer deposition. Subsequently, the samples were poled in a positive corona discharge at room temperature. A very significant improvement of the surface-charge stability has been observed on the modified FEP films. The phenomenon is not restricted to the thermal stability of the surface charge, but is also found in long-term charge-decay measurements. Typical relaxation times for positive charge under isothermal conditions are at least one order of magnitude higher after the surface modification. Thermally-stimulated-decay data indicate that the half-value temperatures of the vapor-treated samples have been enhanced to almost 200°C. Thus, the thermal stability of positive charge in modified FEP films may reach values that were so far only obtained on negatively charged FEP electrets. The results are discussed in connection with the formation of deep traps on the chemically modified polymer surfaces and in the context of two-dimensional surface-layer nanodielectrics.

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Buch (Monographie)

Dmitry Rychkov, Kuznetsov, A., Rychkov, A. A.

СТАБИЛИЗАЦИЯ ЗАРЯДА ПОЛИМЕРНЫХ ЭЛЕКТРЕТОВ (Charge stabilization in polymer electrets)

A textbook for Engineering or Physics bachelor/master students

2013

ISBN: 978-5-8064-1938-6

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Zeitschriftenartikel

Dmitry Rychkov, Kuznetsov, A., Rychkov, A. A.

Thermally Stimulated Electret Surface Potential Recovery in Polyethylene Films Modified in Phosphorus Trichloride Vapor

(in Russian)

Izvestiya RGPU: Scientific Journal, vol. 157, pp. 113-118

2013

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg

Zeitschriftenartikel

Dmitry Rychkov, Rychkov, A. A., Efimov, N., A. Malygin, Gerhard, R.

Higher stabilities of positive and negative charge on tetrafluoroethylene–hexafluoropropylene copolymer (FEP) electrets treated with titanium-tetrachloride vapor

Applied Physics A - Materials Science and Processing, vol. 112, no. 2, pp. 283-287

2013

DOI: 10.1007/s00339-013-7821-1

Abstract anzeigen

Tetrafluoroethylene–hexafluoropropylene copolymer (FEP) films were treated with titanium-tetrachloride vapor in a molecular-layer deposition process. As a result of the surface treatment, significant improvements of the thermal and temporal charge stability were observed. Charge-decay measurements revealed enhancements of the half-value temperatures and the relaxation times of positively charged FEP electrets by at least 120 °C and two orders of magnitude, respectively. Beyond previous publications on fluoropolymer electrets with surface modification, we here report enhanced charge stabilities of the FEP films charged in negative as well as in positive corona discharges. Even though the improvement for negatively charged FEP films is moderate (half-value temperature about 20 °C higher), our experiments show that the asymmetry in positive and negative charge stability that is typical for FEP electrets can be overcome by means of chemical surface treatments. The results are discussed in the context of the formation of modified surface layers with enhanced charge-trapping properties.