I have some ceramics insulators that are coated with different kind of materials in order to investigate which material is better to use in Contaminated areas . What test I need to investigate insulators if coatings are suitable or not.
If you want to compare the electrical behavior the best is to perform electrical erosion tests (leakage current testing in salt fog for extended time).
http://clumb.free.fr/WG11/docs/public/Capetown136.pdf
Dear Narjes Bagheri,
Can you please introduce more details ? Such what is the physical or chemical characteristic you need to characterize ? What is the purpose of the coatings ? Are they for to protect the insulator or to create a conductive path ?
Thanks
Regards
I think, the best method is to use the same method for check insulation properties of ceramics before and after coating. I have no idea what technique you used earlier to see electrical properties of your material.
To find out what your nanolayer consists of, use XPS and also for the thickness measurement of the nanolyer an XPS with depth profiling would be nice.
Most ceramics are used as insulators, if so, there"s not much one can determine but in advance studies they can also act as soft/semi conductors, which is a kind of a material that transfers a range of electrical impulses according to your needs. Proper answer to your question would require more information. If you do not want to reveal your entire process you need, at least, to mention method you are using to add this layer, it 'd be best if you care to include analytical methods you have at hand, type of element applied and thickness of the layer as well. cm.
Thanks all for your pay attention.
I have some insulators with different kind of coating on it. Because I would like to improve properties of insulators in contaminated area. Some of them coated with TiO2 nano particles and some of them with another kind material like polymers. It was not important for me. AS you mentioned it is important to insulator should pass all electrical and mechanical tests a polluted condition. But also the layer should be stable for at less 10 years. Is there any standard to investigate insulator in this respect?
I have not coated my self and asked people if they can. I want to investigate them which one is better
Dear Narjec IEC 507 is a well accepted accelerated aging test under contaminated conditions
http://www.teias.gov.tr/IEC/iec60507%7Bed2.0%7Db.img.pdf
Dear Narjes Bagheri,
If the goal is stability achievement, so high purity calcium phosphate cement can be utilized. However, the dosage depends on electrical properties
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