The effects of MoO3 addition on microwave dielectric properties of Bi6B10O24 ceramics for ULTCC applications

• Published in: Journal of materials science. Materials in electronics Vol. 35; no. 9; p. 624
• Main Authors: Xia, Xiaoyan, Dai, Ying, Sun, Siqi, Chen, Wen, Zhang, Feng, Pei, Xinmei
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2024; Springer Nature B.V
• Subjects: Boron; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Dielectric properties; Energy consumption; Global positioning systems; GPS; Low temperature; Materials Science; Optical and Electronic Materials; Polyvinyl alcohol; Portable equipment; Resonant frequencies; Sintering; Solid solutions; Spectrum analysis; Temperature; Wireless communication systems; Wireless communications
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-024-12342-9

Microwave ceramic with low‐sintering temperature is one of the most significant classes of materials to realize the multifunction and miniaturization of portable devices. In this paper, Bi 6 B 10 O 24 ceramics using the solid-state reaction method are prepared with MoO 3 addition, to achieve both low-temperature sintering and excellent microwave dielectric properties. It is demonstrated that MoO 3 diffuses into the lattice of Bi 6 B 10 O 24 to form a solid solution. The higher quality factor (Q ×  f ) of the ceramic is successfully obtained and the temperature coefficient of resonant frequency (τ f ) is adjusted to near zero at the same time without much change in the dielectric constant ( ε r ) due to the Mo 6+ incorporation. Compared to Bi 6 B 10 O 24 ceramics without addition, the optimum properties of ε r  = 13.9, Q ×  f  = 37,000 GHz, τ f  = − 20 ppm/°C are achieved for Bi 6 B 10 O 24 ceramics containing 19 mol% MoO 3 . The ceramics are potential candidates for ultra-low temperature co-fired ceramics (ULTCC) applications in wireless communication systems.