Study of surface corrosion resistance of corundum single crystals using layer-by-layer etching

V.G.Potapova, T.V.Druzenko, L.A.Litvinov, A.B.Blank


Institute for Single Crystals, National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine

Received January 22, 1999

The surface corrosion resistance of corundum single crystals has been studied depending on their growing method, crystallographic orientation, structure perfection and machining method. To that end, the layer-by-layer etching of the crystals by condensed phosphoric acid followed by determination of dissolved aluminum using atomic absorption electrothermal technique.

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