2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 5: Composite, Ceramic, Quasi-crystals, Nanomaterials & Coatings
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 578 pages |
| ISBN: | 978-1-987820-07-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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PREPARATION OF TiO2-SiO2 FILM DEPOSITED ON SILICON RUBBER ELECTRICAL INSULATORS USING SOL-GEL DIP-COATING METHOD
Majid Jafari1;1METERIAL ENGINEERING OF NAJAFABAD UNIVERSITY, Esfahan, Iran (Islamic Republic of Iran);
Type of Paper: Regular
Id Paper: 74
Topic: 16
Abstract:
Recently, the high voltage power lines and electrical insulators were widely developed in order to conduct electricity.
The electrical discharge phenomenon caused by contamination of insulator surfaces is one of the main problems that affects electric power systems.
In this research, TiO2-SiO2 nano coating was applied on electrical insulator via sol-gel method at first, and then, the hydrophobicity properties of this coating were investigated.
The coating sol was prepared by using titanium tetra isopropoxide (TTIP), tetraethoxysilane, hydrochloric acid, ammoniac, absolute alcohol and deionized water as reactant materials. TiO2-SiO2 thin film was deposited on substrate by sol-gel dip coating method at a withdrawal speed of 10 cm/min. The X-ray diffraction results showed no trace of TiO2-SiO2 peaks, while the presence of absorption peaks of Ti-O and Si-O bonds were obtained by FTIR spectrometer.
Data of hydrophobicity test revealed that the contact angle increased from 89 to 140 degrees and the maximum value was achieved for sample with 25% TiO2. SEM micrographs indicated that fabricated coating was uniform without any crack.
The final result by AFM roughness analysis exhibited the roughness value of prepared coatings, which was increased by increasing the TiO2 content. Therefore, it was revealed that the TiO2 coating surface contamination could be reduced.