• Title, Summary, Keyword: Benzotriazole (BTA)

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Effect of the Addition of Benzotriazole on the Streaming Electrification Properties in Transformer Oil

  • Shin, Jong-Yeol;Hong, Jin-Woong
    • Transactions on Electrical and Electronic Materials
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    • v.11 no.6
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    • pp.288-291
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    • 2010
  • Accidents can occur as a result of streaming electrification when transformer oil is used as an insulating oil in large ultra-high voltage transformers. Methods for adding a streaming electrification inhibitor to reduce the streaming electrification has been studied extensively. In this paper, in order to develop a method for reducing streaming electrification effectively, 4 different specimens were prepared by the addition of benzotriazole (BTA) to a virgin specimen with constant stirring. The specimens were examined to determine the appropriate amount of BTA addition that would suppress the streaming electrification most effectively. The results showed that the streaming electrification characteristics of the specimen in the streaming transformer oil were best when the amount of BTA addition was about 10 ppm. The streaming electrification current was reduced by adding 30 ppm BTA until the temperature reached $65^{\circ}C$. The polarity of the streaming electrification current was negative when the temperature exceeded $65^{\circ}C$. Therefore, the streaming electrification current, which can be a cause of transformer accidents, can be suppressed in large ultra high voltage transformer oil. This paper reports on the optimal amount of BTA addition and the best conditions for controlling the streaming velocity of transformer oil.

Effect of Corrosion inhibitor, Benzotriazole (BTA), on Particle Adhesion in Cu CMP (Cu CMP중 BTA에 의한 Particle의 흡착에 관한 연구)

  • Song, Jae-Hoon;Hong, Yi-Koan;Kim, Tae-Gon;Park, Jin-Goo
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.366-367
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    • 2005
  • The effect of benzotriazole (BTA) on the adhesion force of silica and pad particle on Cu/TEOS wafer surfaces was investigated with and without the addition of BTA. Cu-BTA had the isoelectric point (IEP) at around pH 4$\sim$8. Pad particles were more positive zeta potentials than silica. The adhesion force initially decreased of silica and pad particle on Cu surfaces when BTA was added. However, the more BTA was added, the more adhesion force gradually increased with the increase of BTA concentrations. Then the adhesion force of pad particle was higher than silica. And TEOS didn't resulted increasing adhesion force like Cu when BTA was added in DI water.

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Polishing Behavior and Characterization of Cu Surface in Citric Acid based Slurry with Corrosion Inhibitor (BTA) (부식방지제(BTA)가 첨가된 Cu CMP 슬러리에서의 연마거동과)

  • Kim, In-Kwon;Kang, Young-Jae;Hong, Yi-Kwan;Kim, Tae-Gon;Park, Jin-Goo
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.42-43
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    • 2005
  • 본 연구에서는 Cu 슬러리에 부식방지제인 BTA를 첨가하여 슬러리내의 과수의 농도, pH 의 변화, 연마입자의 종류에 따라 연마거동에 미치는 영향과 각 chemical 변화에 따른 Cu surface의 변화를 살펴보았다. BTA (Benzotriazole, $C_6H_4C_3H$)를 첨가함으로써 본 연구에서 시행된 pH 와 과수의 변화에 상관없이 Cu-BTA film을 형성하여 Cu의 dissolution을 최대한 억제하는 것을 확인할 수 있었다. 또 그로인해 BTA를 첨가하지 않았을 때보다 얇은 passivation layer를 형성함을 알 수 있었고 contact angle도 더 높았다. 연마율의 경우에도 BTA가 첨가됨으로써 감소됨을 확인할 수 있었고 연마입자로 alumina particle을 사용한 경우에는 pH6, 과수 10vol%이상에서는 오히려 연마율이 증가하였다. fumed silica의 경우에는 hardness가 작아 mechanical적인 제거력이 낮아 BTA가 첨가되어도 연마율에는 큰 영향이 없었다.

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The Influence of the BTA on Electrical Properties of Synthetic Fluids (합성절연유의 전기적 특성에 미치는 BTA의 영향)

  • Shin, Jong-Yeol;Shin, Hyun-Teak;Hong, Jin-Woong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.11 no.2
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    • pp.162-166
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    • 1998
  • Synthetic fluid, class 7 group 2, as an insulating and cooling material is selected as. specimen, arid it is studied for the physical and electrical properties. Also, Benzotriazole(following as BT A) known as a suppressant of streaming electrification is added to it, and the change of physical and electrical properties by addition of BT A is investigated. From the spectrum of FT-IR, it is confirmed that the absorption peak in wavenumbers $3400{\sim}3450[cm^{-1}]$ is small or disappears when BTA is added. AC breakdown strength and volume resistivity of each specimen are investigated. It is considered that the effective content of BTA is about 10[ppm] for the suppression of electrification in this experiment.

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Influence of Coating Process on Properties of BTA (Benzotriazole) Coating Film for Outdoor Bronze Artifacts Conservation (옥외 청동문화재 보존을 위한 BTA 방청 피막의 특성에 미치는 코팅 조건의 영향)

  • Shim, G.T.;Yoo, Y.R.;Kwon, Y.H.;Kim, Y.S.
    • Korean Journal of Metals and Materials
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    • v.47 no.10
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    • pp.652-659
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    • 2009
  • Many ancient and historical artifacts were made by copper and its alloys. In the case of outdoor exposure artifacts, the surface could be suffered from corrosion and tarnish by the reaction with its environment. In order to preserve the artifacts, surface treatment would be needed and BTA coating has been usually applied to tin-bronze. This paper dealt with the evaluation of the properties of BTA coated film using a linear polarization method and AC impedance measurement. On the base of corrosion rate and film resistance for the specimen formed by coating process, optimum coating conditions are as follows; 3 cycles brushing or 3 cycles spraying coatings for natural dried process and 1 cycle brushing coating or 5 cycles spraying coating for hot-air dried process.

Pitting Corrosion Inhibition of Sprinkler Copper Tubes via Forming of Cu-BTA Film on the Inner Surface of Corrosion pits

  • Suh, Sang Hee;Suh, Youngjoon;Kim, Sohee;Yang, Jun-Mo;Kim, Gyungtae
    • Corrosion Science and Technology
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    • v.18 no.2
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    • pp.39-48
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    • 2019
  • The feasibility of using benzotriazole (BTAH) to inhibit pitting corrosion in the sprinkler copper tubes was investigated by filling the tubes with BTAH-water solution in 829 households at an eight-year-old apartment complex. The water leakage rate was reduced by approximately 90% following BTAH treatment during 161 days from the previous year. The leakage of one of the two sprinkler copper tubes was investigated with optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction analysis to determine the formation of Cu-BTA film inside the corrosion pits. All the inner components of the corrosion pits were coated with Cu-BTA films suggesting that BTAH molecules penetrated the corrosion products. The Cu-BTA film was about 2 nm in thickness at the bottom of a corrosion pit. A layer of CuCl and $Cu_2O$ phases lies under the Cu-BTA film. This complex structure effectively prevented the propagation of corrosion pits in the sprinkler copper tubes and reduced the water leakage.

Analysis of Cu CMP according to Corrosion Inhibitor Concentration (Cu CMP에서 Corrosion Inhibitor에 의한 연마 특성 분석)

  • Joo, Suk-Bae;Lee, Hyun-Seop;Kim, Young-Min;Cho, Han-Chul;Jeong, Hae-Do
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.113-113
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    • 2008
  • Cu CMP (Chemical Mechanical Planarization) has been used to remove copper film and obtain a planar surface which is essential for the semiconductor devices. Generally, it is known that chemical reaction is a dominant factor in Cu CMP comparing to Silicon dioxide CMP. Therefore, Cu CMP slurry has been regarded as an important factor in the entire process. This investigation focused on understanding the effect of corrosion inhibitor on copper surface and CMP results. Benzotriazole (BTA) was used as a corrosion inhibitor in this experiment. For the surface analysis, electrochemical characteristics of Cu was measured by a potentiostat and surface modification was investigated by X-ray photoelectron spectroscopy (XPS). As a result, corrosion potential (Ecorr) increased and nitrogen concentration ratio on the copper surface also increased with BTA concentration. These results indicate that BTA prevents Cu surface from corrosion and forms Cu-BTA layer on Cu surface. CMP results are also well matched with these results. Material removal rate (MRR) decreased with BTA concentration and static etch rate also showed same trend. Consequently, adjustment of BTA concentration can give us control of step height variation and furthermore, this can be applicable for Cu pattern CMP.

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The Volume Resistivity Characteristics on Fluid Flow of Ultra-High Voltage Transformer Oils added BTA (BTA를 첨가한 초고압변압기유의 유동시 체적고유저항특성)

  • Lee, Yong-Woo;Lee, Soo-Won;Shin, Hyun-Taek;Han, Sang-Sub;Hong, Jin-Woong
    • Proceedings of the KIEE Conference
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    • pp.267-269
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    • 1997
  • The electrical properties due to the Benzotriazole(following as BTA) additive in fluids for insulating and cooling the ultra-high voltage transformer is studied in this paper. Specimen having the several contents of BTA, such as 5[ppm]. 10[ppm] and 30[ppm] is used in order to investigate the characteristics on volume resistivity in case of fluid flow in experimental device made in lab. Volume resistivity is decreased with an increase of fluid flow velocity and increased with BTA content in low temperature region, but volume resistivity of specimen contained BTA 10[ppm] is the largest thing over $30[^{\circ}C]{\sim}50[^{\circ}C]$ than the others in experiment.

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