Effect of Glass Addition on the Microwave Dielectric Properties of CaMgSi ₂ O ₆ Ceramics

Abstract

CaMgSi 2 O 6 (CMS) ceramics prepared by the solid‐state ceramic route have a sintering temperature of 1300°C/2 h. The sintering temperature of CMS was reduced below the melting point of Ag using low‐melting LBS and LMZBS glasses. In the case of CMS+15 wt% LMZBS sintered at 900°C/2 h, the dielectric properties obtained were ɛ r =8.2, Q u × f =32,000 GHz (10.15 GHz), and τ f =–48 ppm/°C. The CMS+15 wt% LBS composite, sintered at 925°C/2 h, showed ɛ r =8, Q u × f =15,000 GHz (10.17 GHz), and τ f =–49 ppm/°C. The chemical compatibility of Ag with the ceramic–glass composites was also investigated for low‐temperature co‐fired ceramic applications.