有色金属科学与工程2025，Vol.16Issue(5)：827-836,10.DOI:10.13264/j.cnki.ysjskx.2025.05.017
烧结钕铁硼矫顽力提升技术的演化路径:基于专利网络视角
Research on the evolutionary path of coercivity improvement technology for sintered NdFeB:A patent network perspective
摘要
Abstract
Coercivity is a key indicator of the resistance of NdFeB magnets to thermal demagnetization.Sintered NdFeB magnets,due to their relatively low coercivity,face limitations in high-temperature applications.Therefore,enhancing the coercivity of sintered NdFeB has become a focal point of research in the industry.This study aims to elucidate the evolutionary path of coercivity enhancement technologies for sintered NdFeB and predict future trends.Utilizing the Incopat patent database and integrating theories of the technology lifecycle,main path analysis,and SAO semantic analysis methods,we conducted a thorough examination of patents related to coercivity enhancement in sintered NdFeB.The results reveal that the development of coercivity enhancement technologies has undergone a process of"separation—fusion—re-separation,"currently positioned in the maturity phase with significant innovation potential.The evolutionary trajectory has progressed through material and structural modification,process optimization,and industrialization,achieving a balance between improved magnetic performance and cost control.Core technologies are concentrated in the areas of grain refinement,grain boundary doping,and grain boundary diffusion,which enhance coercivity by optimizing grain structure and adjusting boundary composition.Future technological advancements are expected to focus on synergistic enhancements in rare earth permanent magnet technology,improvements in corrosion resistance and high-temperature stability,as well as green manufacturing and sustainable development.This research provides important insights for China's strategic innovation and positioning in the high-end magnetic materials sector.关键词
烧结钕铁硼/矫顽力提升/专利分析/演化路径/SAO语义分析Key words
sintered NdFeB/coercivity enhancement/patent analysis/evolutionary path/SAO semantic analysis分类
矿业与冶金引用本文复制引用
罗仙平,李强,王锐,刘子帅,朱文兴..烧结钕铁硼矫顽力提升技术的演化路径:基于专利网络视角[J].有色金属科学与工程,2025,16(5):827-836,10.基金项目
江西省重点高端智库重点项目(20ZKZB-04) （20ZKZB-04）
国家社会科学基金资助项目(20XGL016) （20XGL016）
