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황건태(Geon-Tae Hwang),류정호(Jungho Ryu),윤운하(Woon-Ha Yoon) 한국세라믹학회 2021 세라미스트 Vol.24 No.3
Magneto-mechano-electric (MME) conversion composites composed of distinctive magnetostrictive and piezoelectric materials derive interfacial coupling of magnetoelectric conversion between magnetic and electric properties, thus enabling energy harvesting and magnetic sensing. To demonstrate highperformance MME composites and their applications, various research teams have studied tailoring device structures, enhancing material properties, and developing MME application system. This article reviews the recent research progress of MME composites for energy harvesting and magnetic sensing.
자기-전기(ME) 복합체를 활용한 초미세 자기장 감지 기술
황건태(Geon-Tae Hwang),송현석(Hyunseok Song),장종문(, Jongmoon Jang),류정호(Jungho Ryu),윤운하(Woon-Ha Yoon) 한국세라믹학회 2020 세라미스트 Vol.23 No.1
Magnetoelectric (ME) composites composed of magnetostrictive and piezoelectric materials derive interfacial coupling of magnetoelectric conversion between magnetic and electric properties, thus enabling to detect ultra-low magnetic field. To improve the performance of ME composite sensors, various research teams have explored adopting highly efficient magnetostrictive and piezoelectric phases, tailoring of device geometry/ structure, and developing signal process technique. As a result, latest ME composites have achieved not only outstanding ME conversion coefficient but also sensing of ultra-low magnetic field below 1pT. This article reviews the recent research trend of ME composites for sensing of ultra-low magnetic field.
강자성-강유전성 복합체를 활용한 자기-기계-마찰전기 변환 발전소자
임예슬 ( Yeseul Lim ),황건태 ( Geon-tae Hwang ) 한국전기전자재료학회 2024 전기전자재료학회논문지 Vol.37 No.1
The Internet of Things (IoT) device is a key component for Industry 4.0, which is the network in homes, factories, buildings, and infrastructures to monitor and control the systems. To demonstrate the IoT network, batteries are widely utilized as power sources, and the batteries inevitably require repeated replacement due to their limited capacity. Magneto-mechanoelectric (MME) generators are one of the candidate to develop self-powered IoT systems since MME generators can harvest electricity from stray alternating current (AC) magnetic fields arising from electric power cables. Herein, we report a magnetomechano- triboelectric generator enabled by a ferromagnetic-ferroelectric composite. In the triboelectric nylon matrix, a ferromagnetic carbonyl iron powder (CIP) was introduced to induce magnetic force near the AC magnetic field for MME harvesting. Additionally, a ferroelectric ceramic powder was also added to the MME composite material to enhance the chargetrapping capability during triboelectric harvesting. The final ferromagnetic-ferroelectric composite-based MME triboelectric harvester can generate an open-circuit voltage and a short-circuit current of 110 V and 8 μA, respectively, which were enough to turn on a light emitting diode (LED) and charge a capacitor. These results verify the feasibility of the MME triboelectric generator for not only harvesting electricity from an AC magnetic field but also for various self-powered IoT applications.