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- Title
Effects of Sintering Behavior, Structure, Packing Fraction, and Bond Valence on the Microwave Dielectric Properties of Low-Permittivity Na<sub>2</sub>Ba<sub>6</sub>Si<sub>4</sub>O<sub>15</sub> Ceramics.
- Authors
He, Yinghan; Wei, Xiaoli; Wu, You; Chen, Xiuli; Zhou, Huanfu
- Abstract
Low-permittivity microwave dielectric ceramics could improve the transmission rate of devices. It is important to explore low-permittivity materials with excellent performances. In this paper, a low-permittivity microwave dielectric ceramic Na2Ba6Si4O15 (NBSO) was prepared by a solid-state reaction method. NBSO ceramics belong to a monoclinic system (space group: P21/c). With the increase of sintering temperature, the bulk density and relative density of ceramics also increases. The Q × f is explained by analysis of the packing fraction of NBSO ceramics. When the sintering temperature was 975°C, the packing fraction of the NBSO ceramic reached the maximum values of 57.38%. At the same time, the Q × f value of NBSO reaches its maximum. In addition, the τƒ value is affected by bond valence. The NBSO ceramic has good microwave dielectric performances of εr = 8.81, Q × f = 26,346 GHz, τƒ = − 9.21 ppm/°C) and a low sintering temperature, indicating that it is a strong candidate in the field of low-temperature co-firing technology and has good application prospects in the field of mobile communication base stations.
- Subjects
DIELECTRIC properties; CERAMICS; VALENCE bonds; SPECIFIC gravity; MICROWAVES; SINTERING; SPACE groups
- Publication
Journal of Electronic Materials, 2023, Vol 52, Issue 8, p5440
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-023-10489-5