Low temperature sintering and microwave dielectric properties of Li2ZnSiO4 ceramics with ZB glass

• Published in: Journal of materials science. Materials in electronics Vol. 24; no. 5; pp. 1601 - 1607
• Main Authors: Dou, Gang, Zhou, Dongxiang, Gong, Shuping, Guo, Mei
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.05.2013; Springer
• Subjects: Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Electronics; Exact sciences and technology; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties; Materials; Materials Science; Optical and Electronic Materials; Physics; Scanning probe microscopes, components and techniques; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Microwave Dielectric Property; Zinc Borate; Sinter Temperature; Increase Sinter Temperature; Glass Addition; Network analyzer; Scanning electron microscopy; Densification; Phase composition; Dielectric properties; Microwave; X ray diffraction; Zinc; Borate glasses; Sintering; Microstructure; Glass ceramics; Low temperature; Electroceramics
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-012-0982-4

The influence of zinc borate (ZB) glass on densification, phase composition, microstructure and microwave dielectric properties of Li 2 ZnSiO 4 ceramics has been investigated by using X-ray diffraction, scanning electron microscopy and Advantest network analyzer. Undoped Li 2 ZnSiO 4 ceramics exhibited good microwave dielectric properties of ε r   =  5.8, Q ×  f  = 14,700 GHz and τ f  = −96.6 ppm/°C. When ZB glass was added, the sintering temperature of Li 2 ZnSiO 4 ceramics was effectively reduced to 950 °C. Addition of 25.wt% ZB glass to Li 2 ZnSiO 4 ceramics sintered at 950 °C showed excellent dielectric properties of ε r   =  5.5, Q ×  f  = 10,800 GHz ( f  = 6.8 GHz) and τ f  = −47.2 ppm/°C. Moreover, the material was compatible with Ag electrodes, making it a very promising candidate material for LTCC applications.