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| Composition Analysis of Room Temperature Vulcanized Material with Laser-Induced Breakdown Spectroscopy Technique |
| Wang Xilin1, 2, Wang Han1, 2, Zhao Chenlong1, 2, Chen Can1, 2, Jia Zhidong1, Zhou Jun3 |
1. Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China;
2. Department of Electrical Engineering and Applied Electronic Technology;Tsinghua University Beijing 100084 China;
3. China Electric Power Research Institute Beijing 100192 China |
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Abstract Room temperature vulcanized (RTV) silicone rubber has been widely used in electric power industry of China, due to its good performance in anti-pollution flashover. Thermogravimetric (TG), energydispersive X-ray spectroscopy (EDX), fourier translation infrared spectroscopy (FTIR) are the main methods to analyze RTV coatings. But it is difficult to carry out these methods in the field. In this paper, element composition of RTV materials was analyzed using laser-induced breakdown spectroscopy (LIBS). The results showed that, regarding the same kind of RTV, the relationship between ablation depth of the hole in RTV coatings and the number of laser pulses for breakdown was linear, under the same laser frequency characteristic and the same energy per single laser pulse. Thus, the thickness of coatings can be measured through the bombardment number. Bombarding the same position of the material, in-situ analysis could be carried out on old RTV materials. The spectral line intensity of iron, magnesium and other elements decreased with the number of pulses. It can be used for the detection of the ageing depth of RTV coatings. Hence, the composition change could be acquired. As a high sensitivity and suitability on-line analysis method, LIBS is a new tool for RTV statement access analysis.
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Received: 20 May 2016
Published: 03 January 2017
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2016, Vol. 31 
