POWDER COATING AGENT FOR SILICONIZING DIFFUSION AND METHOD FOR MANUFACTURING HIGH SILICON GRAIN-ORIENTED MAGNETIC STRIP USING THE SAME

摘要

PURPOSE: A powder coating agent for siliconizing diffusion is provided which is coated on the surface of a grain-oriented magnetic strip to enable high silicon to be contained in the strip, and a method for manufacturing a high silicon grain-oriented magnetic strip having superior high frequency magnetic property using the powder coating agent is provided. CONSTITUTION: The powder coating agent for siliconizing diffusion comprises 100 weight parts of MgO powder; and 0.5 to 85 weight parts of Fe-Si based calcined powder on the basis of the MgO powder, wherein the Fe-Si based calcined powder has a particle size corresponding to a sieve size of -25 mesh and contains 25 to 70 wt.% of Si, and wherein the Fe-Si based calcined powder is a composite compound powder. The method for manufacturing a high silicon grain-oriented magnetic strip comprises the processes of coating the powder coating agent comprising 100 weight parts of MgO powder and 0.5 to 85 weight parts of Fe-Si based calcined powder on the basis of the MgO powder on the surface of a decarburized and annealed strip in the slurry state; drying the slurry coated strip; and finally finish annealing the resulting strip at high temperature under ordinary annealing conditions.