Abstract
The forming region of La2O3-B2O3-CaO (LBC) glass-ceramics sintering aid was investigated. The effects of CaO content and the La/B ratio on the crystallization behavior and sintering behavior were studied. The results demonstrated that the glass forming region of LBC glass-ceramics was La2O3:0-27 mol%; B2O3:46-83 mol%; CaO: 0-44 mol%. The addition of CaO which changed the crystallization tendency of glass-ceramics could effectively reduce the glass transition temperature (Tg) and the softening temperature (Ts). The crystallization temperature (Tp) increased at first and then decreased with the increase of CaO content. The increase of the La/B ratio could effectively weaken the network continuity and structural strength leading to the glass transition temperature (Tg), the softening temperature (Ts) and the crystallization temperature (Tp) decreased. When the CaO content was 20 mol% and the ratio of La/B was 0.3, the LBC glass-ceramics had a good thermal stability (ΔT= 139 °C) and a low softening temperature (Ts =662 °C) which showed the potential to be used in the sintering aid for LTCC applications.
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