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Sequential RTV/(TiO2/SiO2) nanocomposite deposition for suppressing the leakage current in silicone rubber insulators

Parand, P ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1007/s00339-020-03522-5
  3. Publisher: Springer , 2020
  4. Abstract:
  5. The sequential deposition method is introduced for suppressing the leakage current in silicone rubber insulators. Room temperature vulcanizing silicone and TiO2/silica nanocomposites are sequentially deposited on silicone insulators surface. TEM results showed that TiO2 nanoparticles size is about 20–30 nm, and the structural study revealed their anatase crystalline structure. Silica nanoparticles are deposited on the surface of insulators by spray deposition. The contact angle was enhanced from 104° to 149° after nanoparticles deposition, which confirms the hydrophobicity improvement. Results show that leakage current for nanocomposite samples in a contaminated environment reduced to about 0.02 mA, which was 1 mA in insulators without any coating, indicating a remarkable improvement after coating. The stability of bare and coated insulators was examined under kaolin, salt, NH4Cl-contaminated environment, and also UV radiation for more than 500 h. Results show that the sequential deposition could be utilized as a cost-effective and scalable method for enhancing the hydrophobicity and stability of insulators. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature
  6. Keywords:
  7. Leakage current ; Nanocomposite ; Silicone rubber ; Coatings ; Contact angle ; Cost effectiveness ; Deposition ; Hydrophobicity ; Insulating materials ; Insulator contamination ; Leakage currents ; Nanocomposites ; Nanoparticles ; Rubber ; Scalability ; Silica ; Silica nanoparticles ; Silicones ; Titanium dioxide ; Contaminated environment ; Crystalline structure ; Nanocomposite samples ; Room temperature vulcanizing ; Sequential deposition ; Silicone rubber insulators ; Spray deposition ; Structural studies ; TiO2 nanoparticles
  8. Source: Applied Physics A: Materials Science and Processing ; Volume 126, Issue 5 , 2020
  9. URL: https://link.springer.com/article/10.1007/s00339-020-03522-5