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Lai Y, Yin M, Li B, Yang X, Gong W, Yang F, Zhang Q, Wang F, Wu C, Li H. Cu 2+-Ion-Substitution-Driven Microstructure and Microwave Dielectric Properties of Mg 1-xCu xAl 2O 4 Ceramics. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3332. [PMID: 36234460 PMCID: PMC9565854 DOI: 10.3390/nano12193332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/13/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
In this work, Cu-substituted MgAl2O4 ceramics were prepared via solid-state reaction. The crystal structure, cation distribution, and microwave dielectric properties of Mg1-xCuxAl2O4 ceramics were investigated. Cu2+ entered the MgAl2O4 lattice and formed a spinel structure. The substitution of Cu2+ ions for Mg2+ ions contributed to Al3+ ions preferential occupation of the octahedron and changed the degree of inversion. The quality factor (Qf) value, which is correlated with the degree of inversion, increased to a maximum value at x = 0.04 and then decreased. Ionic polarizability and relative density affected the dielectric constant (εr) value. The temperature coefficient of the resonant frequency (τf) value, which was dominated by the total bond energy, generally shifted to the positive direction. Satisfactory microwave dielectric properties were achieved in x = 0.04 and sintered at 1550 °C: εr = 8.28, Qf = 72,800 GHz, and τf = -59 ppm/°C. The Mg1-xCuxAl2O4 solid solution, possessing good performance, has potential for application in the field of modern telecommunication technology.
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Affiliation(s)
- Yuanming Lai
- School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Ming Yin
- School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Baoyang Li
- School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Xizhi Yang
- School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Weiping Gong
- Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516001, China
| | - Fan Yang
- School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Qin Zhang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Fanshuo Wang
- School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Chongsheng Wu
- School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Haijian Li
- Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China
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Yang P, Yang X, Lai Y, Zhang Q, Su H, Wu C, Jiang G. Tailoring temperature stability of MgAl2O4 microwave dielectric ceramic via (Cu0.5Ti0.5)3+ co-substituted. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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