FIELD: process engineering.
SUBSTANCE: invention relates to glass-ceramic insulating materials to be used for insulation of wire from nickel and its alloys, thermocouple alloys and bimetallic wires. Proposed method comprises producing sol based on tetraethoxysilane hydrolysed in acid medium and alloyed with inorganic acids and the mix of metal nitrates, mixing said sol with refractory oxides, homogenising of produced suspension by ultrasound with application of coating on wire and coating heat treatment. Coating application and thermal treatment are carried out by feeding wire through bath with suspension and through tunnel kiln at the speed of 0.5-3 m/min at sol-to-oxide ratio equal to 1-2:1.
EFFECT: glass-ceramic flexible thin 5-30 mcm-deep coatings.
7 cl, 2 tbl
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