The co-fired behaviors between Ag and glass–ceramics materials in LTCC

Abstract

The paper studied the interfacial co-fired behavior between silver and Ba–Ti–B–Si–O glass–ceramics composites for LTCC application. The dielectric properties of this LTCC glass–ceramic materials were as follows: ɛ ≈ 8–10, tanδ ≤ 2 × 10−3 (at 1 GHz), and its sintering temperature was lower than 900 °C. The Ag elemental distribution near the interface between glass–ceramics and Ag was investigated by scanning electronic microscopy and energy spectrum analysis. No de-lamination, camber and cracking were found between LTCC/Ag systems after firing at 810–900 °C for 2 h. The experimental results showed that the diffusion of silver was mainly decided by sintering temperature and microstructure of LTCC. Promoting densification of the LTCC can prevent Ag diffusion from co-fired interface.