亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        Editorial for the Special Issue on Rare Earth Permanent Magnets

        2020-05-22 08:01:36WeiLi
        Engineering 2020年2期

        Wei Li

        Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China

        Rare earth permanent magnets (REPM)have been widely used in the energy,information and communication, and automobile industries, as well as in electrical engineering, biomedical engineering, and other fields. In a great leap, China has advanced from being the country with the largest rare earth reserves to becoming the world’s largest production base and application market of REPM. In 2018,China’s production of REPM green compacts amounted to 1.57 × 105t, of which 2.69 × 104t were exported.China’s REPM industry is one of the most important industries in the world and holds great influence.

        Given the application requirements of sintered Nd-Fe-B magnets in wind power generation, hybrid and pure-electric cars,and energy-efficient appliances, and with the demand for a low-carbon economy rapidly increasing, the main direction of development for REPM is toward double-high magnets (i.e., with a high energy product and high coercivity) with a low cost. Such magnets will meet the new application requirements of REPMs in emerging fields and will help address the rising prices of raw materials,while promoting the efficient use of rare earth resources.In recent years, great progress has been made in the fields of high-performance REPMs, heavy rare earth reduction technology,hot-pressing and deformation technology,waste magnet recycling,and more.

        This special issue presents the latest developments in REPM based on leading research in the field,with the aim of establishing a forum for the discussion of recent progress in ①the improvement of magnetic properties, ②reasonable and balanced usage of rare earth resources, ③ REPM recycling, ④ advanced characterization of REPM microstructures and magnetic properties,and ⑤the extensive exploration of novel permanent magnets. The issue includes eight papers that report on recent advances in the field of REPM and provides a useful understanding of the state of the art.

        We would like to thank the contributors for their valuable manuscripts and the reviewers for their dedication and responsibility. It has been our honor to work together with the editorial team of Engineering and the Chinese Academy of Engineering.Their great efforts to assemble this excellent issue are very much appreciated.

        区一区二区三免费观看视频 | 成人免费看吃奶视频网站| 一区二区国产在线观看| av大片在线无码永久免费网址| 亚洲精品中文字幕91| 国产高清在线观看av片 | 日韩综合无码一区二区| 毛多水多www偷窥小便| 亚洲国产美女在线观看| 日本激情久久精品人妻热| 国产一区亚洲二区三区| 久久精品国产网红主播| 2021国产成人精品国产| 国产人妖一区二区av| 丁香花五月六月综合激情| 漂亮人妻被中出中文字幕久久| 国产主播福利一区二区| 成人影院免费观看在线播放视频| 国产日产在线视频一区| 极品少妇被猛的白浆直喷白浆| 欧美自拍视频在线| 一区二区日本影院在线观看| 色吧噜噜一区二区三区| 国产一卡2卡3卡四卡国色天香 | 亚洲午夜无码久久久久软件| 亚洲一区二区三区免费网站| 精品国产三级a∨在线| 成人无码视频| 日韩精品极品视频在线观看蜜桃| 成人av蜜桃在线观看| 精东天美麻豆果冻传媒mv| 五月婷婷六月激情| 国产少妇一区二区三区| 高清午夜福利电影在线| 精品一区二区久久久久久久网站| 国产91第一页| 国产一级黄色录像大片| 狠狠色狠狠色综合| 深夜国产成人福利在线观看女同| 亚洲国产大胸一区二区三区| 亚洲色图片区|