Microstructure and magnetic properties of microwave sintered M-type barium ferrite for application in LTCC devices |
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| Authors: | Qinghui Yang Huaiwu Zhang Yingli Liu Qiye Wen |
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| Affiliation: | 1. Motor R&D Group, Samsung Electronics, 443-742 Suwon, South Korea;2. R&D Team, SsangYong Materials Corporation, 790-300 Pohang, South Korea;1. Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, Guangdong 518055, PR China;2. Research Center, Shenzhen Zhenhua Fu Electronics Co., Ltd., Shenzhen, Guangdong 518109, PR China;3. College of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, PR China;1. Department of SciTec, University of Applied Sciences Jena, 07745 Jena, Germany;2. Dept. of High Frequency Technology, Hamburg University of Technology, 21073 Hamburg, Germany |
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| Abstract: | M-type barium ferrite material has been widely applied in microwave gyromagnetic devices, but its high sintering temperature restrains its application in chip microwave gyromagnetic devices. In our experiment, single phase barium ferrite has been fabricated at low temperature by microwave sintered (MS) method, the sintering time and temperature were significantly reduced from 22 h and 100 °C for the conventional sintering (CS) process to 2 h and 840 °C for MS process, respectively. Experiments show that MS treated barium ferrite materials possess excellent properties with a saturation magnetization of 53.6 emu/g and coercive force 623.8 Oe. In the frequency range of 1 MHz–1.8 GHz, the real and imaginary part of permeability is between 1.8–3.0 and 0–0.55, and the real and imaginary part of dielectric constant is between 2.4–2.7 and 0–0.15; respectively. Our results indicate that the microwave sintering method is a potential important technique in LTCC technology. |
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