Improved microstructure and high quality factor of Li2Ti0.9(Zn1/3Ta2/3)0.1O3 microwave ceramics with LiF additive for LTCC applications |
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| Affiliation: | 1. School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243032, PR China;2. Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology, Maanshan 243002, PR China;1. State Key Laboratory of High-Performance Ceramics & Super?ne Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. AVIC Chengdu Aircraft Industrial (Group) Co., Ltd., Chengdu, China;2. State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China;1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shanxi, 710072, China;2. School of Electronics and Information Engineering, Beihang University, Beijing 100191, China;1. School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China;2. Department of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;1. College of Earth Sciences, Guilin University of Technology, Guilin 541004, China;2. Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China;3. College of Science, Guilin University of Technology, Guilin 541004, China;4. College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, China;1. School 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 |
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| Abstract: | In this study, LiF was utilized to decrease sintering temperature, improve microstructure, enhance Q×f, and regulate τf of Li2Ti0.9(Zn1/3Ta2/3)0.1O3 (abbreviated as LTZT) ceramics. A complete solid solution together with a phase transition from monoclinic to cubic rock salt structure occurred. The cell volume of LTZT ceramics decreased as the LiF content increased. Relatively dense and uniform microstructures were observed for the ceramics as the LiF content was not less than 2 wt%. The dielectric constant of LTZT ceramics initially increased and then decreased with the increasing LiF content. The FWHM of the Raman band at about 808 cm?1 was closely related to the Q×f value. Notably, the samples with 3 wt% LiF exhibited the highest relative density of 97.4 % and satisfactory microwave dielectric properties of εr = 23.14 ± 0.16, Q×f = 110,090 ± 1100 GHz, and τf = +3.25 ± 1.45 ppm/°C when sintered at 950 °C. Good chemical compatibility with silver indicated the ceramic is a promising candidate in LTCC applications. |
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| Keywords: | Lithium fluoride Microwave dielectric properties Phase transition LTCC |
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