Alumina coating
05-23-2008, 12:44 PM,
#1
Alumina coating
Dear Gordon what should be the thickness of pure alumina coating by plasma spray to withstand a DC voltage of 1000Volts. Is there a chart or any caluculation to find the thickness required to withstand a particular voltage.
regards
RaviQuestion
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05-23-2008, 10:59 PM,
#2
RE: Alumina coating
Hi Ravi

It will depend very much on the specific alumina powder and plasma parameters. Typically, 50 - 700 volts/0.001" (25 micrometre) dielectric strength. Premium fine high purity alumina spray with optimum parameters (1% porosity or less) giving best values. Higher and far more consistent values obtained on sealed coatings.
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07-07-2008, 10:03 AM,
#3
RE: Alumina coating
raviswanadha Wrote:Dear Gordon what should be the thickness of pure alumina coating by plasma spray to withstand a DC voltage of 1000Volts. Is there a chart or any caluculation to find the thickness required to withstand a particular voltage.
regards
RaviQuestion

For plasma spray alumina, for 1000Volts you should have around 200micrometers of alumina coating.
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