稀土功能材料的专利态势分析

本文针对稀土永磁材料、稀土发光材料、稀土催化材料、稀土抛光材料、稀土贮氢材料、稀土陶瓷材料、稀土晶体材料等7个关键技术领域进行检索分析,从专利申请趋势、申请人、技术分布、专利许可情况等方面进行了统计研究,结合非专利文献及行业报告等文献,可知,我国稀土功能材料专利申请整体呈现上涨态势,专利申请总量世界第一,但核心专利匮乏,且专利转化率低;日本、美国重视在我国的专利布局,但我国稀土功能材料专利海外布局量较少;针对上述问题提出了几点建议,一是跟踪并借鉴重点申请人以及热点领域的专利技术,促进提高创新能力,寻找专利布局机会;二是增强自主创新能力,发展有自主知识产权的稀土永磁材料,提高专利成果的转化率;三是建立稀土专利联盟,促进行业共同发展,共同应对来自国外的知识产权诉讼。

Defects in Tm^(3+)/Yb^(3+)-doped YVO_4 Crystals

The microscopic defects have been investigated for crystal Tm3+/Yb3+:YVO4. These defects mainly include the inclusions (solid inclusions, bubbles and inclusions of the liquid phase), dendrites and growth stripes. They are caused by in-pure raw materials, unstable growth conditions, super-cooling component and so on. Tm3+/Yb3+:YVO4 crystals of large size and excellent optical quality are grown by improving the growth conditions to eliminate these defects.