Two novel ultralow temperature firing microwave dielectric ceramics LiMVO6 (M = Mo,W) and their chemical compatibility with metal electrodes |
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| Affiliation: | 1. College of Information Science and Engineering, Guilin University of Technology, Guilin 541004, China;2. State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Guangxi universities key laboratory of non-ferrous metal oxide electronic functional materials and devices, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China;1. National Engineering Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Jianshe Road, Chengdu 610054, PR China;2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Jianshe Road, Chengdu 610054, PR China;1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Xi?an Jiaotong University, Xi?an 710049, Shaanxi, China;2. Xi?an Jiaotong University Suzhou Academy, Suzhou 215123, Jiangsu, China;1. College of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China;2. School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China;3. The Key Laboratory of Electronic Thin Film and Integrated Device, University of Electronic Science and Technology of China, Chengdu 610054, China;1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China;2. Guangxi Key Laboratory of New Energy and Building Energy Saving, Guilin University of Technology, Guilin 541004, China;3. College of Information Science and Engineering, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | Low temperature cofired ceramics technology (LTCC) has been widely studied and used in wireless communication because of their outstanding capability for device miniaturization and integration. However, many commercial microwave dielectric materials have high sintering temperatures that pose challenge for cofiring with inner electrodes. Herein, two brannerite vanadate LiMVO6 (M = Mo, W) ceramics with intrinsically low sintering temperatures were prepared. Dense and stable LiMVO6 (M = Mo, W) ceramics could obtained at 640 °C for LiMoVO6 and 700 °C for LiWVO6. Favorable microwave dielectric properties were also obtained with εr = 13.3, Q × f = 12,460 GHz, and τf = +101.0 ppm/°C for LiMoVO6 and εr = 11.5, Q × f = 13,260 GHz, and τf = +163.8 ppm/°C for LiWVO6. Moreover, the relationship between crystal structure and microwave dielectric properties was studied by means of packing fraction, bond valence, and octahedral distortion. Their chemical compatibility with the metal electrodes were confirmed. |
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| Keywords: | Microwave dielectric properties LTCC Brannerite structure Chemical compatibility |
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