首页 | 本学科首页   官方微博 | 高级检索  
     


Direct measurement of electrocaloric effect in lead-free (Na0.5Bi0.5)TiO3-based multilayer ceramic capacitors
Affiliation:1. Department of Materials, Imperial College London, London, SW7 2AZ, UK;2. Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA;3. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA;1. School of Engineering, London South Bank University, London, SE1 00A, UK;2. Department of Materials, Imperial College London, SW7 2AZ, UK;3. Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China;4. Materials Research Laboratory, University of Nova Gorica, Nova Gorica, 5000, Slovenia;1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;3. School of Chemical and Molecular Engineering, Zhengzhou University, Zhengzhou, China;1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China;2. School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People׳s Republic of China;2. National Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, People׳s Republic of China;3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, People׳s Republic of China;1. Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;2. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. College of Physics, Qingdao University, 308 Ningxia Road, Qingdao 266071, China;5. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, UK;1. Department of Microelectronic Science and Engineering, Ningbo University, 315211 Ningbo, China;2. Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province, Ningbo University, 315211 Ningbo, China
Abstract:Multilayer ceramic capacitors (MLCCs) of lead-free NBT-based ceramics are produced and their electrocaloric effect (ECE) is characterised for the first time. Dense MLCCs with 97μm-thick active layers are successfully produced by tape casting. Dielectric permittivity measurements reveal the MLCCs to have properties similar with that reported for the corresponding bulk ceramics, including Td∼50°C and TS∼100°C. Direct ECE measurements also reveal agreement and confirm the previously reported tendency of the high-field ECE peak to shift towards TS. The highest value of ECE, ΔTmax∼1.7K is measured at 90°C under 90kV/cm. A low breakdown strength of 93kV/cm needs to be solved to realise stronger electric fields and achieve commercially viable ECE values.
Keywords:Lead-free ceramics  Ferroelectric relaxor  Electrocaloric materials  Multilayer ceramic  Capacitors
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号