Low-temperature sintering and microwave dielectric properties of Mg3B2O6-LMZBS composites

• DOI: 10.1007/s10854-011-0532-5
• Publication Date: 2011-09-29T01:54:53Z
• Authors: Dong-Xiang Zhou; Fei Sun; Yun-Xiang Hu; Qiu-Yun Fu; Gang Dou
• Keywords: 0103 physical sciences; 01 natural sciences

The Mg3B2O6 ceramics with lithium magnesium zinc borosilicate (LMZBS) glass were prepared at a lower sintering temperature. The effects of the glass addition on the densification, phase development, microstructure and microwave dielectric properties of the Mg3B2O6 ceramics were investigated. The addition of LMZBS glass improved the densification and lowered the sintering temperature of Mg3B2O6 ceramics from 1,300 to 950 °C. X-ray diffraction patterns showed that Mg3B2O6 transformed into Mg2B2O5 and a new phase, Li2ZnSiO4, crystallized from the glass phase. Because of the high dielectric performance of these phases, Mg3B2O6 mixed with 55 wt% LMZBS sintered at 950 °C for 3 h had er = 6.8, Q × f = 50,000 GHz, and τf = −64 ppm/°C at 7.28 GHz. The chemical compatibility of ceramic-glass composites with Ag was also investigated for LTCC.