Research on the Distribution of Rare Earth Application Technologies in the Aerospace Field from a Patent Perspective
The application of rare earth elements in aerospace field is an important field at home and abroad.In view of the application of rare earth elements in aerospace field,the paper mainly uses scientometrics,mathematical statistics,and other methods to analyze the application technology innovation patents of rare earth elements from the perspective of application countries and main patentees.It is found that the global rare earth element technology patents in aerospace have shown an overall growth trend since the application,especially after 2000 the patent application was very active and the number was rela-tively large.The global mail technologies are distributed in alloy and non-metallic products and application technologies,espe-cially in ceramic coating and aircraft power technology from 2017 to 2019,which are the hot areas in three years.The patents from the United States and China are more than those of other countries,and the main patents in China focus on neodymium,lanthanum,cerium,yttrium,scandium,and the United States focus on scandium,yttrium,erbium,cerium,terbium,etc.The world's main patentees in this field are European and American companies.It is suggested that China should strengthen the systematic research layout of rare earth in the field of aerospace and enhance the technology research and development through international and domestic cooperation.
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