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| Analysis on current status and trend of tantalum powder preparation technology based on patents |
| ZHANG Mingxian1，2，ZHU Fang3，ZHANG Guoxiang3，LIU Xinmin4，5，XU Yi1，2 |
| （1. School of Physics and Materials Science, Nanchang University, Nanchang 330031， China; 2. International
Institute for Materials Innovation, Nanchang University, Nanchang 330096, China; 3. Jiujiang Tanbre company,
Ltd. , Jiujiang 332013， China; 4. Ganzhou Nonferrous Metallurgy Research Institute company, Ltd., Ganzhou
341000, China; 5. China Tungsten Industry Magazine company, Ltd., Beijing 100086, China） |
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Abstract The relevant patents about“tantalum powder”in Derwent Innovations Index (DII) database during
1992 to 2021 were studied in this paper. The mapping knowledge domain of patents on tantalum powder was
draw by the Scientific tool“Citespace”. The research status and the development tendency of tantalum powder
were also analyzed. The results show that the global application number of tantalum powder patents increases
significantly since 2011， China has the largest proportion of patent applications among them. However, the highcited patents of tantalum powder preparation with high-technical threshold and high profit are mainly held by
European enterprises and American enterprises. It shows that Europe and the United States have leading advan‐
tages in the research and development ability of tantalum powder. In the future, China should strive to make a
breakthroughs in the direction represented by the capacitor tantalum powder with high capacitance, high voltage
and high reliability
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Received: 15 September 2022
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2023, Vol. 33 
