Method of producing potassium silicate glass coating for ferrous magnetic sheet stock
Abstract
Abstract METHODS OF MAKING POTASSIUM SILICATE GLASS COATINGS FOR SILICON STEEL MAGNETIC SHEET STOCK, WHEREIN THE SHEET STOCK, HAVING ON ITS SURFACES A FILM COMPRISING A MILL GLASS LAYER, OR PHOSPHATE COATING LAYER, OR LAYERS OF BOTH, IS COATED WITH AN AQUEOUS SOLUTION OF POTASSIUM SILICATE HAVING A SILICA TO POTASSIUM OXIDE RATIO OF FROM ABOUT 2:1 TO ABOUT 2.5:1 AND HIGHER. THE COATED STOCK, IN STRIP FORM, IS THEN HEATED RAPIDLY TO A TEMPERATURE OF FROM ABOUT 1000*F. TO ABOUT 1650*F., WHEREBY TO FORM ON THE STOCK A SMOOTH, HEAT-RESISTANT, PROTECTIVE, INSULATIVE GLASS HAVING A TOTAL FINAL THICKNESS OF FROM .04 MIL TO ABOUT .2 MIL, AND WHEREBY TO IMPROVE THE MAGNETIC PROPERTIES OF THE STOCK.
Inventors
- 👤 Dale M Kohler
Bibliographic Details
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