Microwave Dielectric Properties of MLi2Ti6O14 [M=Ba and Sr] Ceramics and Their Compatibility with Sliver. Issue 12 (25th November 2014)

• Record Type: Journal Article
• Authors: Su, Congxue; Fang, Weishuang; Wei, Zhenhai; Tang, Ying; Fang, Liang
• Editors: Sebastian, M.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 12(2014)
• Page Start: 3740
• Page End: 3743
• Publication Date: 2014-11-25
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13344
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : Microwave dielectric properties of Li‐containing orthorhombic compounds with the composition of MLi2 Ti6 O14 (M = Ba and Sr) were investigated. The ceramics were synthesized by the conventional solid‐state reaction route. The optimized sintering temperatures for the BaLi2 Ti6 O14 and SrLi2 Ti6 O14 ceramics are 1025°C and 1000°C, respectively. Favorable microwave dielectric properties were obtained with moderate εr of 31.7 and 33.6, quality factor Q × f values of 23 300 (at 7.3 GHz) and 8700 GHz (at 6.8 GHz), and low‐temperature coefficient of resonant frequency (τf ) values of −15.4 and −2.7 ppm/°C for BaLi2 Ti6 O14 and SrLi2 Ti6 O14 ceramics, respectively. The addition of BaCu(B2 O5 ) can effectively reduce the sintering temperature below 930°C without degrading the microwave dielectric properties. Compatibility with Ag electrode indicates these materials could be applied to low‐temperature cofired ceramic devices.