Dear friends,
I am facing a problem with an issue of milky Haze in the coatings developed for aesthetic applications. All the layers were deposited by magnetron sputtering having thickness in nanometers.
As all knows that the high transmission low emissivity coatings will have a silver layer for blocking the IR light in the infrared region. Also, the silver layer having an advantage in such applications for providing better Solar heat gain coefficient and Low emissivity.
To develop such coatings the coated glasses should undergo thermal treatment at 650 degrees to make the glass and coating non-temperable. During this process, I am facing an issue of the formation of a milky haze in the coated glass after muffle.
kindly suggest which way and how to select and proceed for further action for developing the high transmission low emissivity coatings.
Hello Vemuri,
What other materials are in the coating? What you describe seems like crystallites formation during the thermal treatment.
Hello Daniel Poitras,
How are you and how is your family members. I hope the dangerous COVID effect may be reduced in Canada.
Thanks for giving a reply to my question. in general, we have used the material like SIlinicon nitride with a combination of the target having the materials (SIAL), Composition of zinc oxide with composition Aluminium zinc oxide, Nickle chrome oxide.
with the above-said materials including the silver layer, it was noticed that after tempering the coated samples at 650 degrees. The Haze problem was determined.
Please suggest which and what could the problem during the thermal treatment process.
Thanking you
Hello Daniel
The materials are metals like silver, nickel, chrome, and oxide layer for protecting the low E stack.
The problem of Haze is observed when the sample goes into thermal treatment at 650 degrees for 6 minutes.
Kindly suggest what way I can proceed.
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