Novel low-εr and lightweight LiBO2 microwave dielectric ceramics with good chemical compatibility with silver

Yin, Changzhi, Du, Kang, Zhang, Meng, Yang, Jiaqing, Wang, Fei, Guo, Yanbo, Cheng, Mingfei, Cai, Yiyang, Song, Xiaoqiang, Khaliq, Jibran, Li, Chunchun, Lei, Wen and Lu, Wenzhong (2022) Novel low-εr and lightweight LiBO2 microwave dielectric ceramics with good chemical compatibility with silver. Journal of the European Ceramic Society, 42 (11). pp. 4580-4586. ISSN 0955-2219

JECESOC-D-22-00280_R1 (1).pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

Download (1MB) | Preview
Official URL:


High-speed signal propagation systems require dielectric ceramics with low relative permittivity (εr) and a high-quality factor (Qxf). In this paper, a novel low-permittivity borate ceramic (LiBO2) was synthesized using a conventional solid-state reaction method. Based on the X-ray diffraction and Rietveld refinement, the LiBO2 crystallized into a monoclinic structure with a space group of P21/c. Dense and single-phase ceramic was obtained at 640 °C with comprehensive microwave dielectric properties: a low relative permittivity (εr) of 5.3, a moderate quality factor (Q×f) of 18,200 GHz at 16.3 GHz, and a temperature coefficient of resonant frequency (τf) of − 66.2 ppm/°C. Good chemical compatibility with Ag electrode and thermal expansion coefficient of 25.4 ppm/°C was achieved demonstrating the potential applications as dielectric resonances in wireless communications and substrates in low-temperature cofired ceramics.

Item Type: Article
Additional Information: Funding Information: This work was supported by the National Natural Science Foundation of China (NSFC- 52072133 and 62061011 ) and the Innovation Team Program of Hubei Province , China ( 2019CFA004 ).
Uncontrolled Keywords: Ceramics, Dielectric properties, Low-permittivit, Wireless communication
Subjects: F100 Chemistry
F200 Materials Science
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 10 Jun 2022 13:40
Last Modified: 20 Apr 2023 08:00

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics