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Participant

Join Date: Jun 2015
Posts: 1

Question About Correct Electric Insulation Coating

06/02/2015 3:30 PM

I need to determine the correct coating to use on ceramic insulators in my company's laser system. We need the ceramic parts to not absorb or release any water within the vessel system. Due to our cleaning processes and changes in humidity the ceramics still contain small amounts of moisture after they are assembled. I would like to apply a coating to the ceramic parts within the vessle before the vessel is assembled. The coating must be able to withstand heat around 250 C, it must not be reactive with HCL, and it must be able to withstand 15 kV. I would like any recommendations for coatings to use, or a process to heat the ceramic so that almost all the water is eliminated.

Thank you. Looking forward to the responses.

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Guru
United States - Member - New Member

Join Date: Mar 2010
Location: In the pool because it is too hot.
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#1

Re: Question About Correct Electric Insulation Coating

06/02/2015 3:35 PM

Put your ceramic in a oven for a definite span of time. Heat oven and ceramic and release the moisture to atmosphere.

Or change ceramic to a porcelain or glassy type.

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Guru

Join Date: Oct 2008
Posts: 39916
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#2

Re: Question About Correct Electric Insulation Coating

06/02/2015 3:47 PM

Bake it in a vacuum over for 6 hours at 300C.

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Guru

Join Date: Mar 2012
Location: Out of your mind! Not in sight!
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#3

Re: Question About Correct Electric Insulation Coating

06/02/2015 10:45 PM

http://www.enduroshield.com/aus/products/tile-coating.aspx

This is what you get asking for coating.

But I think you are better off baking the ceramic parts to get all moisture out.

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Guru
United States - Member - Hobbies - Fishing - New Member Hobbies - Target Shooting - New Member Hobbies - RC Aircraft - New Member Engineering Fields - Aerospace Engineering - New Member

Join Date: May 2009
Location: On the road, USA
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#4

Re: Question About Correct Electric Insulation Coating

06/03/2015 2:47 AM

Hire a qualified engineer that's familiar with what your trying to achieve. You'll find product reliability and safety much greater with someone there in your plant that knows what your trying to achieve.

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Guru

Join Date: Jun 2011
Location: Mossel Bay, SA
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#5

Re: Question About Correct Electric Insulation Coating

06/03/2015 4:09 AM

Hang them out on the line. Tumble- drying will result in an awful racket.

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Guru
Hobbies - DIY Welding - New Member

Join Date: Sep 2007
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#6

Re: Question About Correct Electric Insulation Coating

06/03/2015 7:30 AM

Additional information on your requirements would be useful, but from what you have supplied I suggest you baking to remove existing water, followed by coating the insulator with a non-wetting dielectric such as teflon.

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