论文部分内容阅读
发明的详细说明本发明是关于在硅钢板表面涂布一定比例的金属粉末或半金属粉末的MgO悬浊液,经高温退火后生成优质绝缘薄膜的方法。一般为了提高硅钢板的磁性,防止在高温退火时带卷的粘结同时在硅钢板表面生成耐热性的电气绝缘薄膜,将氧化镁等金属氧化物的粉末以悬浊液的状态于高温退火前在钢板上进行涂布。氧化镁有由氢氧化镁或炭酸镁低温烧成的所谓轻质氧化镁和高温烧成的重质氧化
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of coating a surface of a silicon steel sheet with a MgO suspension of a metal powder or a semi-metal powder in a certain ratio to form a good insulating film after being annealed at a high temperature. In general, in order to improve the magnetic properties of silicon steel sheets, to prevent adhesion of the coil during high-temperature annealing and to form heat-resistant electrically insulating films on the surface of the silicon steel sheets, powders of metal oxides such as magnesia are annealed in a suspension state at a high temperature Before coating on the steel plate. Magnesium oxide has magnesium hydroxide or magnesium carbonate low-temperature calcination of so-called light magnesium oxide and high-temperature firing of heavy oxidation