武汉工程职业技术学院学报2026，Vol.38Issue(1)：1-6,6.
氧化镁中硼含量对取向硅钢底层和磁性能的影响
Effect of B in MgO on the Underlayer and Magnetic Properties of Grain-oriented Silicon Steel
刘敏 1郭小龙 2高洋 1程祥威 1骆新根 1程迪夫2
作者信息
- 1. 宝钢股份中央研究院硅钢所 湖北 武汉:430080
- 2. 宝钢股份武钢有限硅钢部 湖北 武汉:430080
- 折叠
摘要
Abstract
Magnesium oxide(MgO)coating applied on the surface of grain-oriented silicon steel serves as a critical precursor for the formation of the magnesium silicate bottom layer.During manufactur-ing,various additives are introduced into the MgO coating system,among which boron-containing addi-tives exhibit a significant influence on the formation of the magnesium silicate glass film.The magnesium oxide with different boron contents was coated on the specimen surface,and the high-temperature annea-ling process of grain-oriented silicon steel was simulated in the laboratory.The morphology of the mag-nesium silicate glass film and the boron nitride in the specimens during the formation of the bottom layer was observed by focused ion beam microscopy(FIB),and its composition was analyzed by energy disper-sive spectroscopy(EDS).The results show that:(1)Boron oxide,as a low-melting-point substance,can accelerate the formation of the magnesium silicate interlayer.(2)The diffusion rate of boron is the main factor affecting the reaction between boron oxide and aluminum nitride.(3)Boron diffusion mainly occurs along grain boundaries.As the temperature increases,the provided energy gradually overcomes the lattice potential barrier,leading to an increase in bulk diffusion through lattice interstices and vacancies.(4)An appropriate amount of boron can effectively react with unstable surface inhibitors such as silicon ni-tride(Si3 N4)or aluminum nitride(AlN)to form fine boron nitride(BN)inhibitors,improving their sta-bility and increasing the secondary recrystallization temperature.However,excessive boron can destroy a-luminum nitride inhibitors,resulting in a loss of inhibition capability.关键词
取向硅钢/磁性能/硅酸镁底层/氧化镁/氮化硼Key words
grain-oriented silicon steel/magnetic properties/magnesium silicate glass film/magnesi-um oxide/boron nitride分类
矿业与冶金引用本文复制引用
刘敏,郭小龙,高洋,程祥威,骆新根,程迪夫..氧化镁中硼含量对取向硅钢底层和磁性能的影响[J].武汉工程职业技术学院学报,2026,38(1):1-6,6.
