Sintering Behavior, Phase Structure, and Microwave Dielectric Properties of Low-Permittivity Li5Al5Zn8Ge9O36 Ceramics

• Published in: Journal of electronic materials Vol. 52; no. 5; pp. 2932 - 2939
• Main Authors: Deng, Shan, Qu, Xin, Xiao, Yaqi, Deng, Haiqing, Gao, Pengxiang, Chen, Xiuli, Zhou, Huanfu
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.05.2023; Springer Nature B.V
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Crystal structure; Dielectric properties; Electronics and Microelectronics; Grain growth; Grain size; Instrumentation; Materials Science; Microwave equipment; Morphology; Optical and Electronic Materials; Permittivity; Review Article; Scanning electron microscopy; Sintering; Solid phases; Solid State Physics; Low permittivity; microwave dielectric properties; spinel structure
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-023-10295-z

A low-permittivity Li 5 Al 5 Zn 8 Ge 9 O 36 microwave dielectric ceramic was prepared via a conventional solid-phase reaction, and its sintering behavior, phase structure, and microwave dielectric properties were investigated. The Li 5 Al 5 Zn 8 Ge 9 O 36 ceramic had a cubic spinel structure, and no other phases were detected. The microstructure of the ceramic was relatively uniform and dense. The Li 5 Al 5 Zn 8 Ge 9 O 36 ceramic sintered at 1150°C exhibited excellent microwave dielectric properties ( ε r  = 6.66, Q  ×  f  = 24,600 GHz, and τ f  = −38 ppm/°C), indicating that it is a good candidate for microwave equipment.