基于专利引文的稀土产业中游技术演进路径分析

Analysis of the Evolution Path of Midstream Technology in Rare Earth Industry Based on Patent Citation

基于专利信息计量视角,采用主路径分析方法客观呈现稀土产业中游的技术演进路径。路径中涉及到的核心技术,既是演进历史上的核心技术,也是未来技术的核心支撑。首先,基于专利申请过程中被发明人或者审查员引用的专利使用Ucinet构建专利引文网络;其次,通过Pajek进行主路径分析,绘制出技术演进路径,揭示出稀土产业中游技术演进。研究发现,稀土永磁材料的制备、钕铁硼永磁材料、永磁复合励磁同步电机转子成为近年的热点核心技术。

Based on the perspective of patent information measurement,this paper uses the main path analysis method to objectively present the technological evolution path of the rare earth midstream industry.The core technologies involved in the path are both the core technology in the history of evolution and the core support of future technologies.Firstly,Ucinet is used to construct a patent citation network based on patents invented by the inventor or examiner in the patent application process.Secondly,the main path analysis is carried out by Pajek,and the technological evolution path is drawn to reveal the evolution of the mid-stream technology of the rare earth industry.It is found that the preparation of rare earth permanent magnet materials,NdFeB permanent magnetic materials and permanent magnet hybrid excitation synchronous motor rotors have become the hot core technologies in recent years.