VERFAHREN ZUR HERSTELLUNG VON ISOLIER-UEBERZUEGEN AUF STAHLERZEUGNISSEN

摘要

Steel products may be coated with an insulating composition by a process which involves coating a uniform layer of finely ground glass powder on the steel and burning it at temperatures ranging from 700 DEG -1000 DEG C. Following, a paste comprising a mixture of the afore-mentioned glass, aluminum oxide and an evaporable liquid are deposited upon the burned coating, dried and burned again at 700 DEG -1000 DEG C. The resultant coatings adhere well to steel and resist temperatures as high as 860 DEG C., so suggesting then use for coating steel destined as a substitute for ceramic supports in electronic and hybrid microelectronic applications.