The validation of the thermal step method

Cherifi, A.; Dakka, M. Abou; Toureille, A.

doi:10.1109/14.204866

Cited by 96 publications

(21 citation statements)

References 9 publications

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“…Techniques such as the laser-induced pressure pulse method (LIPP) [8], thermal step method (TS) [9] and pulsed electroacoustic method (PEA) [10] have been utilized to observe charge dynamics in dielectric materials. Significant progress has been made in understanding charge generation, transport, trapping and conduction.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the surface potential decay of corona-charged polymer films using the pulsed electroacoustic method

Chen

Zhang

2007

Meas. Sci. Technol.

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In this paper, the pulsed electroacoustic (PEA) technique that allows the determination of space charge in a dielectric material has been used to monitor the electrical potential decay of corona-charged polyethylene films of different thicknesses. To prevent possible disturbance of the surface charge during the PEA measurements, two thin polyethylene films were placed on both sides of the corona-charged sample. Charge profiles measured at different times were used to calculate the potential across the sample. The obtained potential decay was compared with the potential measured using the conventional method. Good agreement has been obtained. More importantly, the charge profile obtained using the PEA technique indicates that bipolar charge injection has taken place.

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Section: Introductionmentioning

confidence: 99%

Measurement of the surface potential decay of corona-charged polymer films using the pulsed electroacoustic method

Chen

Zhang

2007

Meas. Sci. Technol.

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“…14,40 This is due to the nondestructive nature of the TSM, which is achieved by choosing the value of the maximum temperature imposed by the thermal step equal to the ambient temperature.…”

Section: B the Thermal Step Methodsmentioning

confidence: 99%

“…The value of this current I(t) read by a pico-ammeter (pA) is related to the distribution of both the electric field and the space charge. 39 This setup is called TSM in short-circuit condition, and the scheme is shown in Figure 3, 14,17,40 while the expression of I(t) is reported in the following equation:…”

Section: B the Thermal Step Methodsmentioning

confidence: 99%

“…14,40 In order to measure space charge distribution, the testing procedure requires two steps: first, the high voltage is applied 2016) to the middle electrode, while the pA is short circuited. Second, the high voltage is disconnected in order to avoid the carriage of charges through the electrodes, compromising the correct measurement.…”

Section: The Thermal Step Methods Under Applied DC Fieldmentioning

confidence: 99%

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Contributed Review: Review of thermal methods for space charge measurement

Imburgia

Romano

Caruso

et al. 2016

Review of Scientific Instruments

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Decay of space charge in conjugated polymers measured using pyroelectric current transients J. Appl. Phys. 93, 2884 (2003) The space charge accumulation phenomenon has garnered great interest over the last two decades because of the increased use of direct current in high voltage electrical systems. In this context, a significant relevance has been achieved by the thermal methods, used for solid dielectrics. This paper presents a review of this non-destructive measurement system used for the measurement of space charge. The thermal pulse method, the thermal step method, and the laser intensity modulation method are described. For each configuration, the principle of operation, the thicknesses analyzed, and the spatial resolution are described, reporting also the main related applications. Published by AIP Publishing. [http://dx

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“…The most widely used thermal methods include the thermal pulse method, 13,14 the laser intensity modulation method ͑LIMM͒, 15,16 and the thermal step method. 17 The acoustic methods include the pressure wave propagation ͑PWP͒ method 18,19 ͓also known as the laser induced pressure pulse ͑LIPP͒ method 20 ͔, the piezoelectrically generated pressure step method 21 and the pulsed electroacoustic method. 22 It has been shown previously that non-uniform poling of thin P͑VDF-TrFE͒ film can occur, with the polarization starting at the anode, and the mechanism has been discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

Polarization of thick polyvinylidene fluoride/trifluoroethylene copolymer films

Chan

Zhao

Kwok

et al. 1996

Journal of Applied Physics

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Thick ͑800 m͒ polyvinylidene fluoride/trifluoroethylene ͑P͑VDF-TrFE͒͒ copolymer films for transducer applications are poled under applied voltage at elevated temperatures. By using different heat treatments, poling temperatures, and poling time, we are able to prepare a uniformly poled film with a single resonance peak at 1.3 MHz, or a nonuniformly poled film with two resonances ͑1.3 and 2.6 MHz͒, or a film with bimorph structure with a single resonance at 2.6 MHz. The nonuniform polarization which arises from charge injection from the cathode is checked by the pressure wave propagation method. The polarization mechanisms in these thick films are expected to be similar to those previously reported for thin films. The results obtained in this work may lead to practical applications because they suggest a means for controlling transducer frequency by poling.

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The validation of the thermal step method

Cited by 96 publications

References 9 publications

Measurement of the surface potential decay of corona-charged polymer films using the pulsed electroacoustic method

Measurement of the surface potential decay of corona-charged polymer films using the pulsed electroacoustic method

Contributed Review: Review of thermal methods for space charge measurement

Polarization of thick polyvinylidene fluoride/trifluoroethylene copolymer films

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