Development status,innovation process and hotspot of ceramic membrane technology innovation from the perspective of patent
Ceramic membranes are known for their excellent thermal and chemical stability and have been considered as an ideal separation membrane for the process industry.The patents in the field of ceramic membrane were researched by the methods of patentometrics and main path analysis to reveal the development status and innovation process.The research shows that the current ceramic membrane technology is in a period of rapid development.China,Japan and the United States are currently the most active countries in the global ceramic membrane technology innovation.The main path analysis of the patent citation network shows that before 1990 the innovation in the field of ceramic membrane mainly focused on the basic technological of membrane preparation.With the development of preparation technology,the separation and application of ceramic membrane became the focus of innovation from 1991 to 2005.After 2007,researchers began to innovate high-performance ceramic membrane for applications.At present,the hotspots of technological innovation in the field of ceramic membrane mainly focus on the application of ceramic membrane target low-carbon,preparation of ceramic membrane based on new two-dimensional materials and the application of ceramic membrane materials with high separation accuracy.
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