Effects of Glass Additions on (Zr,Sn)TiO ₄ for Microwave Applications

Abstract

The effects of glass additions on the properties of (Zr,Sn)TiO 4 as a microwave dielectric material were investigated. The (Zr,Sn)TiO 4 ceramics with no glass addition sintered at 1360°C gave Q = 4900 and K = 37 at 7.9 GH z . Several glasses, including SiO 2 , B 2 O 3 , 5ZnO–2B 2 O 3 , and nine commercial glasses, were tested during this study. Among these glasses, (Zr,Sn)TiO 4 sintered with ZnO‐B 2 O 3 –SiO 2 (Corning 7574) showed more than 20% higher density than that of pure (Zr,Sn)TiO 4 sintered at the same temperature. A 5‐wt% addition of SiO 2 , to (Zr,Sn)TiO 4 , when sintered at 1200°C, gave the best Q : Q = 2700 at 9 GHz. Results of XRD analysis and scanning electron microscopy and the effect of glass content are also presented.