• The Transactions of the Korean Institute of Electrical Engineers
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• v.39 no.4
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• pp.357-363
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• 1990

A thermally stimulated current measurement using a temperature gradient (TG-TSC) has been applied to the study of dipolar depolarization in polymers. It has been clarified that theoretical analysis of TG-TSC in the initial rise region corresponds with the experimental results. We conclude that the experimental results on a cross-linked polyethy-lene (XLPE) film can be explained using the above relation and that the charasteristics obtained from the above theoretical analysis can be used for ascertaining the presence of a constant temperature gradient in a film.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2001.09a
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• pp.47-51
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• 2001

The electrical degradation phenomena of epoxy composites to be used as a molding material for transformers were studied. The electrets were first manufactured by applying high voltages to five kinds of specimens given a mixing rate, and then TSC(Thermally Stimulated Current) values at the temperature range of $-160\sim200[^{\circ}C]$ were measured from a series of experiments. The behaviour of carrier and its origin in epoxy composites were examined, respectively, And various effects of electrical degradation on epoxy composites were also discussed in this study.

• Electrical & Electronic Materials
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• v.6 no.1
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• pp.50-54
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• 1993

각종 monomer를 공중합시킨 PE의 고전계 전기전도와 X선 유기 TSC(X-ray induced thermally stimulated current)를 측정하고 공중합 monomer의 영향에 대하여 검토하였다. 할로겐을 함유한 공중합 PE에서 고전계 전기전도가 억제되는 것을 관찰하였다. 또 할로겐을 함유하는 monomer를 공중합시킨 PE의 X선 유기 TSC에서는 공중합에 의한 전자 trap은 약 0.4eV정도로 평가된다. 이들 시료에서 절연 파괴 강도가 상승한 것은 전자 트랩이 전자의 전계가속을 억제하여 고전계 전기전도를 억제시키고 절연파괴강도를 향상 시킨 것으로 추측된다.

• Electrical & Electronic Materials
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• v.1 no.3
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• pp.243-250
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• 1988

530A의 질화막과 23A의 엷은 산화막두께로 제작된 MNOS 소자의 기억트랩분포와 기억특성을 TSC방법과 C-V방법으로 조사하였다. 소자는 전기적으로 기억갱신이 가능하며 무전압유지가 반영구적임을 확인하였다. 기억트랩에 해당하는 TSC곡선을 분석하는데는 공간적, 에너지적인 트랩의 분포모형을 가정하고 best fitting법을 사용하였다. 그 결과 기억트랩은 질화막-산화막 계면에서 질화막안으로 10A 깊이로 분포되었으며 에너지준위는 질화막전도대 하단에서 2.35-2.38eV로 분포되어 있음을 밝혔다. 또한 방전기구는 산화막층을 통한 직접터널링과 열적여기를 함께 고려하여 설명할 수 있었다.

• 전기의세계
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• v.27 no.3
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• pp.31-35
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• 1978

In this paper, in order to clarify the mature of traps in polymer, the thermally stimulated current (TSC) measurements were mad on high density polyethylene by changing the condition of the high-field treatment such as the strength of the field (Fe), the treatment time (te) and the heating rate (.betha.). In addition, the TSC measured from the HDPE was compared with that from LDPE having different crystallinity. The obtained results can suggest that the trapping proceeds during the high-field treatment and the trap associated with the peak P$_{2}$ may have the closed relation to drystallinity and the release of trapped charge is enhanced by the molecular motion.

• 전기의세계
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• v.30 no.8
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• pp.517-524
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• 1981

Thermally stimulated currents have been obtained from five kinds of polymer electrets. The peak current (I$_{m}$) and the peak temperature (T$_{m}$) of the TSC, particularly at PET thermoelectret, were found to depend on the forming field and the forming temperature. From these experimental results, the TSC spectra can be easily explained by the consideration of the disorientation of dipoles related with glass transition temperature. The obtained results can suggest that the forming field and the forming temperature plays an essential role for charge stability in PET thermoelectrets.ets.

• TTA REPORT
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• v.4 no.6 s.16
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• pp.55-60
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• 1992

• 건축구조
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• v.9 no.2
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• pp.42-44
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• 2002

• Fire Science and Engineering
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• v.23 no.2
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• pp.27-35
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• 2009

In this study, the fire resistance performance of a simple support composite beam, which was sprayed with fire protection coatings, was evaluated. Primary valuables of the study are loading and unloading, shape of composite beam and metal lath of the web. The thickness of the fire protection coating to the three hour resistance is 40mm, but the fire resistance test was performed with 25mm coatings. The test result showed that TSC composit beams with 25mm fire protection coatings can resist on fire for three hours at the both loading and unloading tests. Average and maximum temperatures were less than $250^{\circ}C$ and $310^{\circ}C$ respectively, compared with the standard temperatures for fire resistance on the loading and unloading tests.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1990.10a
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• pp.98-101
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• 1990

In order to investigate the laser effects resulted from the behaviors of carriers for BOPP film, experiment of TSC were carried out on the specimen with 15[$\mu\textrm{m}$] thick irradiated by He-Ne laser. The TSC spectras were observed in the temperature range of -100[$^{\circ}C$] to 130[$^{\circ}C$] with the electric field of 20∼60[MV/m], had show four of the distinguished peak such as ${\alpha}$$_1$, ${\alpha}$$_2$, ${\beta}$ and ${\gamma}$, which appeared at 115, 80, 17 and -30[$^{\circ}C$] respectively. Specially, ${\alpha}$$_1$ was observed and anomalous TSC flowing in the same direction as the charging current on the high-electric field such as 50∼60[MV/m]. In according on the consequences obtained from the studies, the origin of ${\alpha}$$_1$peak was attributed to the detrapping process form trap with 2.88[eV] deep of injected space charge from the chathode in the crystaline regions. The origin of ${\alpha}$$_2$ peak was regarded as the detrapping process of ions trapped with 0.9[eV] deep originated from impurity-ion remained in the specimen during production process of the material, in the crystalline regions. The origin of ${\beta}$ peak was concluded to be due to the depolarization process of "C=0"dipole with the activation energy of 0.75[eV] in the amorphous regions. The origin of ${\gamma}$ peak was responsible to the process combined with the depolarization of "CH$_3$", chain segment, with the activation energy of carriers from the shallow trap with 0.4[eV], in he amorphous regions.