IOP Groups
Charges in Solid Dielectrics
7-9 April 1997
Darwin College, University of Kent at Canterbury, UK
The 1997 Annual Dielectrics Society Meeting
OverviewAt present we have insufficient experimental evidence to confirm or deny the conventional theories of charge injection, transport or trapping within insulators. It is clear however that a better understanding of charge dynamics is required to explain the macroscopic and microscopic response of dielectrics to an electric field.
Recent developments in experimental techniques have made a significant contribution to our knowledge. For example the measurement of dynamic space charge density distributions with high resolution, in conjunction with current measurement methods, are enabling characterisation of the role of space charge in these insulators.
The conference will review theories of charge injection, trapping and transport including the phenomenon of self-trapping. Experimental techniques for the measurement of charge dynamics in insulators and their interpretation and applications will be discussed. The role of charges in ageing and relaxation phenomena will be considered.
Sessions
Session 1: The Physics of Space Charge
Session 2: Space Charge Measurement
Session 3: Poster Session
Session 4: Ageing and Macroscopic Effects
Invited Speakers
- Prof C Alquie, ESPCI, Paris
- Dr J Densley, Ontario Hydro Technologies, Canada
- Prof T J Lewis, Bangor
- Prof G C Montanari, Bologna
- Prof A M Stoneham, University College London
- Prof Y Suzuoki, Nagoya University, Japan
- Prof T Takada, Musashi Institute, Tokyo
- Dr A T Toureille, LEM, Université Montpellier
- Dr P K Watson, XEROX, USA
Papers:
Session 1: The Physics of Space Charge
Session Leaders: Prof T J Lewis and Prof A M Stoneham
Paper 1.1The micro-physics of charge in solid dielectrics
T J Lewis
Charge and Energy Localisation in Dielectrics
M Stoneham
The Growth of High Quality Ultra Thin Gate Dielectrics
C Sofield
Energy localisation associated with polarons and excitons in alpha-quartz
W Hayes
Charge trapping/detrapping induced thermodynamic relaxation processes
G Moya and G Blaise
Influence of charged defects on physical proporties of pyroelectrics near structual phase transition
A S Sigov
Supramolecular control of molecular electronic behaviour
M C Grossel
Session 2: Space Charge Measurement
Session Leader: Dr R N Hampton
Paper 2.1Space Charge Characterisation
G Damamme and C Le Gressus
Study of space charge dynamics in solid dielectrics by simultaneous measurement of external current and space charge distributions
C Alquie
About the origin of space charge with using The Thermal Step Method
A Toureille and N Vella
The extension of the charged region in the mirror experiment
P Carles and B Vallayer
Electrostatic force microscopy of charges in solid dielectrics
G C Stevens and J R Bowler
The Pulsed Electro-Acoustic Technique
J M Alison
High space-charge densities in the bulk of fluoropolymer electrets detected with piezolelectrically generated pressure steps
R Gerhard-Multhaupt, W.Kuenstler, G Eberle and W Eisenmenger
Comparison between PWP method using piezo-electric transducer and PEA method
T Takada and Y Tanaka
Session 3: Poster Session
Paper 3.1
Photoinjection and charge trapping in dielectric in silicon MIS structures with rare earth oxides
V A Rozhkov, A Yu. Trusova and I D Berezhnoy
Space charge observation at the interface between a polyester film and the charge transfer layer of an organic photoconductor
K Fukunaga and T Maeno
Interfacial polarization in polymer blends
A Boersma and J van Turnhout
Detection and influence of free charges in composite material
M Biron, J Warnant, J Vanderschueren, H W Vanderschueren, M Krecke and R Goffaux
Spatial distribution of polarization in polyethylene
M Wubbenhorst, J Hornsby, A Bulinski, S Bamji, M Stachen and D K Das-Gupta
Space-charge measurements on mass-impregnated paper samples
M J P Jeroense and P H F Morshuis
A physical model of space charge behaviour in mass-impregnated paper
M J P Jeroense and P H F Morshuis
Conduction processes and stress grading effects on nonlinear composites: a correlation between current-voltage and surface potential techniques
J Rivenc, M Biron and T Lebey
Influence of the water molecules (H2O) on the charge carrier transport in the polycrystalline layers of low molecular organic dielectric
S Kania and J Kondrasiuk
Effects of dynamic and pre-formed space charge on conduction characteristics in low-density polyethylene
S Hwang-bo, S-C Kim, D-S Shin and M-K Han
Effect of space charge and conduction current on retardation of water tree in insulating polymers
Y-H Kwon, S Hwang-bo, J-H Kang, J-H Lee and M-K Han
Influence of injected charges upon the hydrophobicity of polymer films
E B Bablyuk, A S Sigov and O N Popov
Charge transport on the surface of insulating materials
J P Gosse, P Attne, B Gosse, A Sylvestre, A Crisci and V Ollier-Dureault
The influence of charge on the propagation of a 4 metre guided surface discharge
S J MacGregor, M J Given, S M Turnbull, E Bryce and R A Fouracre
The influence of the capacitor switching ability of High Voltage Circuit-Breakers by surface charge on insulating material parts in interruption chambers
E Zielke
The conduction bistable switching effect in the structure with rare earth fluorides
V A Rozhkov and M B Shalimova
Are water trees fractals?
M Carmo Lanca, L A Dissado, J Marat Mendes and D K Das Gupta
Modelling electrical trees in point-plane geometry - how important are the image charges in the electrodes
K S Bromley, L A Dissado and J C Fothergill
Charge dynamics during electrical treeing measured using a bridge system
J V Champion and S J Dodd
Measurement of Space Charge Distribution in XLPE structures under AC stress
C Bert, R N Hampton, J Lewinere and P Pyne
Space charge accumulation in fresh and degassed XLPE insulation
B Sanden
The influence of pre-conditioning on the space-charge formation in LDPE
M Henriksen, J T Holboll and R J Fleming
Space charge measurement on XLPE plaques under DC conditions
X Wu, S Swingler, N Hampton and A E Davies
Observation of dynamic space charge formation in acetophenone coated low-density polyethylene
T Takada, T Doi and Y Tanaka
Investigation of the semicon electrode-bulk insulator interface in XLPE cable samples using the thermally stimulated current technique
S B Hobdell, T J Lewis, J P Llewellyn and S M Moody
Charge carrier detrapping in PVK films as seen by thermoluminescence after excitation at 15K
I Glowacki and J Ulanski
Study of electrode polarization in side-chain LC polymers by means of the thermal wave technique (LIMM), electromechanical measurements and dielectric spectroscopy
M Wubbenhorst, A Boersma, A M Romijn, I Krakovsky and J van Turnhout
Computer-aided ageing diagnosis for polymers by the Isothermal Relaxation Current Analysis
H.-G Kranz and D Steinbrink
Numerical evaluation of the depth resolution of the charge distribution in insulator using thermal modulation method
V Haas, M Mousseigne, C Mayoux and J L Franceschi
TSC study of relaxations/transitioins in ferroelectric PA11
N Fagegaltier, A Lamure, C Lacabanne, H Mifsud, M Bauer and A Caron
Thermally Stimulated Depolarization - Can one distinguish between the space charge and dipole relaxation?
S M Gubanski
Electrostriction in elastomers
T Romijn, A Posthuma de Boer
Electromechanical measurements on ceramic-polymer composites
E G M Veldman, J van Turnhout, J Schoonman, P van der Put and M Wubbenhorst
Dielectric, direct current and time-of-flight investigations of DGEBD-4D epoxy-amine system under curing
F Friedrich, J Ulanski, G Boiteux and G Seytre
Molecular relaxations in the LC cellulose derivatives and their composites
L Okrasa, J Ulanski, P Wojciechowski, G Bak, G Boiteux and G Seytre
Dielectric relaxations of structural defects in a pharmaceutical drug
C Maraval, A Bernes, C Lacabanne and J I Scheinbeim
Dielectric behaviour of mixed lithium-cadmium ferrites at low frequencies
D Ravinder
Dielectric Relaxation Study of Porous Materials
A Gutina, J Gun, N Kozlovich, O Lev and Y Feldman
Description and interpretation of the dielectric behaviour of liquid ternary systems
M B Rebollo Paz
Dipolar and ionic relaxation in polyurethane based on castor oil
D H F Kando, H N Nagashima, J A Malmonge, W K Sakamoto and G O Chierice
Dielectric relaxation spectroscopy of polycarbonate and its blends
G J Pratt and M J A Smith
Dielectric relaxation studies in ion-irradiated polycarbonate and kapton-H polyimide
J K Quamara, B K Kaushlik and S K Mahna
Low Frequency Dispersion - the ubiquitous dielectric phenomena
A K Jonscher
Low-frequency dispersion in organic molecular compounds
G W Bak and A K Jonscher.
Some physical properties of Au-DLC-Si System
M Dluzniewski, E Staryga, H Abramczyk, G Waliszewska and G W Bak
Combining the Time and Frequency Dielectric Spectroscopy
C J Dias
Electron trapping states in polystyrene
P K Watson and F W Schmidwn
Session 4: Ageing and Macroscopic Effects
Session Leader: Prof G C Montanaril
Paper 4.1Space charges as a trigger for electrical ageing of polymeric insulation
G C Montanari
Charge injection and enhanced filed induced strain response in a polyurethane elastomer
Q M Zhang and J Su
Electromechanical behaviour of flexible polymers
T Romijn, I Krakovsky, M Wuebbenhorst, A Posthuma de Boer
Optical emissions due to space charge effects in insulating polymers: an insight into electrical ageing
G Teyssedre, D Mary, C Laurent and C Mayoux
Packet-like space charge behaviour in insulating polymers
Y Suzuoki, H Kon, K Kaneko, T Mizutani and T Itaya
Space charge formation in gamma-irradiated LDPE
G Chen, H M Banford and A E Davies
On the charge build-up in stressed dielectrics with non-uniform properties
R Coelho and B Aladenize
TSDC Measurements on miniature and full-sized polymeric cables
K Younsi, J M Braun and J Densley
Fere libenter homines id quod volunt credunt - so what have learnt about space charge?
J C Fothergill and L A Dissado
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