Surface ageing of dielectric materials in a controlled atmosphere: A Raman microprobe study

Freebody, Nicola; Vaughan, A. S.

doi:10.1109/ceidp.2010.5723948

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…Freebody y Vaughan (2010), estudiaron esta aplicación para lograr desarrollar un método aproximado, capaz de describir los procesos involucrados en la arborescencia eléctrica, como una alternativa ante la ineficiente descripción mediante otros métodos. El envejecimiento de la superficie de materiales dieléctricos, se genera por el estrés eléctrico al cuál se someten.…”

Section: Aplicaciones Electrónicasunclassified

“…Donde ciertas aplicaciones son alcanzadas con su uso. Entre ellas se encuentra evitar la oxidación del cobre desnudo durante la sinterización de pastas que acoplan dispositivos a su superficie (Zheng et al, 2014), así como el envejecimiento de superficies de materiales dieléctricos, que busca reproducir la química de la arborescencia eléctrica (Freebody y Vaughan, 2010). El efecto de disminución de proliferación de plagas en alimentos también ha sido objeto de estudio.…”

Section: Introductionunclassified

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Avances en Tecnología de Atmósferas Controladas y sus Aplicaciones en la Industria. Una Revisión

Vega

Pinto

2017

Inf. tecnol.

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ResumenEste documento describe la historia de la tecnología de atmósferas controladas, sus avances tecnológicos y sus aplicaciones, proporcionando perspectivas de investigaciones en distintos campos de estudio. Para ello se ha desarrollado una revisión de información, sobre los distintos campos donde la tecnología ha sido aplicada y su eficiencia como alternativa de tratamiento. Los estudios relacionados con este campo generados hasta la fecha, están asociados con el efecto que produce la tecnología en las características organolépticas y funcionales de determinadas frutas (aroma, calidad, potencial antioxidante, polifenoles, etc.) y en la automatización de la tecnología (adaptaciones, monitoreo computarizado), así como el efecto en el campo de la electrónica. En la mayoría de los casos la tecnología ha mostrado una mayor eficiencia que en los métodos tradicionales. Se puede concluir que debido a la amplia alternativa de aplicación y la eficiencia de la de la tecnología de atmósferas controladas, se pueden generar estudios adicionales para complementar su desarrollo futuro. Palabras clave: aplicaciones electrónicas; conservación de alimentos; mortalidad de insectos Advances in Controlled Atmosphere Technology and its Industrial Applications. A Review AbstractThis document seeks to describe the history of the technology of controlled atmospheres, its technological advances and applications, providing research perspectives in different fields of study. For this purpose, a review of information has been developed, about the different fields where this technology has been applied and its efficiency as an alternative method. The studies related to this field generated until today are associated with the effect that the technology produces on the organoleptic and functional characteristics of certain fruits (aroma, quality, antirust potential, polyphenols) as well as the automation of the technology (adjustments, computerized monitoring), and their applications in the field of electronics. In most cases the technology has shown higher efficiency than the traditional methods. It is possible to conclude that due to the wide alternatives of applications of the technology, additional studies can be generated to complement its future development.

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Section: Aplicaciones Electrónicasunclassified

Section: Introductionunclassified

Avances en Tecnología de Atmósferas Controladas y sus Aplicaciones en la Industria. Una Revisión

Vega

Pinto

2017

Inf. tecnol.

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“…As the electrical ageing of PS insulators are less studied subject than their thermal and mechanical ageing so far, the underlying mechanisms are still unclear. A few studies in the relevant literature were mainly interested in the effect of electrical ageing on the structural [9], dielectric [3] and morphological [10] characteristics of PS. Therefore, understanding changes in structural and physical properties of styrene-based polymers and copolymers as a function of electrical ageing conditions, will provide very useful information for predicting long-term performances of PS-based insulating materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of electrical ageing effects on the structural and electrical properties of polystyrene by charging and discharging current method

Hedir,

Slimani,

Moudoud

et al. 2024

Phys. Scr.

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This study focuses on isothermal charging and discharging currents in polystyrene (PS). It is a well known fact that the discharging current is almost the mirror symmetry of the charging current at low electric fields. However, the experimental results presented and discussed in this study have revealed the possibility of an abnormal discharging current (ADC) flowing in the same direction as the charging current. Furthermore, electrical measurements implied that the electrical ageing of PS resulted in a significant increase in the charging current, even for extended ageing periods. Moreover, the intensity and duration of the reverse discharging current have evolved with electrical ageing. This characteristic can be attributed to the presence of ionic impurities both trapped at the polymer surface and in the bulk structure. To highlight the structural changes induced by electrical ageing, detailed structural analyses were conducted using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) analysis. 

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“…By doing this, a wider range of spectroscopic techniques can be applied and the exact processes involved in electrical treeing investigated. It has been suggested that a potential method for achieving this is to corona age a polymer in an inert atmosphere and collect the deposits formed on the needle electrode [5]. The problem with using this method is that although it accurately replicates the chemistry of electrical trees, a large amount of time is needed to generate enough debris for analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Some papers have suggested that in order to understand the formation of electrical trees in polymeric systems, the same volatile fragments present in electrical treeing in bulk need to be generated using alternative methods [4,5]. By doing this, a wider range of spectroscopic techniques can be applied and the exact processes involved in electrical treeing investigated.…”

Section: Introductionmentioning

confidence: 99%

The chemical analysis and replication of polydimethylsiloxane by-products located within electrical trees

Freebody

Vaughan

Lunt

et al. 2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Abstract-We present a spectroscopic study of electrical trees grown in polydimethylesiloxane (PDMS) rubber. Electrical trees were grown at a range of voltages and allowed to propagate throughout the material. Breakdown and tree channels were exposed using cryogenic microtoming. Raman microprobe spectroscopy (RMS), Fourier Transform Infrared (FTIR), and X-ray Photoelectron Spectroscopy (XPS) were applied in order to obtain a detailed spectroscopic analysis of electrical treeing and breakdown in PDMS rubber.For comparison, a selection of liquid systems including PDMS oil, dodecylbenzene (DDB) and dodecane (DD) were subjected to ageing via electrical discharges between two electrodes. The debris subsequently formed was subjected to spectroscopic analysis as before. Results are discussed in comparison to previously published results involving electrical treeing and corona discharge experiments in polyethylene (PE) and PDMS rubber.

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Surface ageing of dielectric materials in a controlled atmosphere: A Raman microprobe study

Cited by 3 publications

References 8 publications

Avances en Tecnología de Atmósferas Controladas y sus Aplicaciones en la Industria. Una Revisión

Avances en Tecnología de Atmósferas Controladas y sus Aplicaciones en la Industria. Una Revisión

Investigation of electrical ageing effects on the structural and electrical properties of polystyrene by charging and discharging current method

The chemical analysis and replication of polydimethylsiloxane by-products located within electrical trees

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