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- Title
Reduction in sintering temperature and tunable microwave dielectric properties in NaCa<sub>4</sub>V<sub>5</sub>O<sub>17</sub> via compositional engineering.
- Authors
Xing, Zhuo; Ma, Chi; Weng, Juhai
- Abstract
Some Li+-substituted NaCa4V5O17 ceramics were designed and fabricated by the solid-state reaction method. Effects of cation doping on the sintering behavior, crystal structure, microstructure, and dielectric properties were systematically studied. As expected, Li+ substitution effectively reduced the densification temperature of NaCa4V5O17 ceramics and lower the relative permittivity (εr), but surprisingly increased the quality factor (Q×f). A composition with 20 mol% Li+ dopants exhibits the highest Q×f = 66,000 ± 124 GHz coupled with an εr of 10.4 ± 0.1 and a τf of − 81.3 ± 1.4 ppm/°C. Such compositional dependence in dielectric properties was analyzed in terms of ionic polarization and packing fraction.
- Subjects
DIELECTRIC properties; CERAMICS; PERMITTIVITY; MICROWAVE sintering; QUALITY factor; SINTERING; MICROWAVES; CRYSTAL structure
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 25, p19759
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08779-5