Influence of B₂O₃ Additive on Microwave Dielectric Properties of Li₂ZnTi₃O₈ Ceramics for LTCC Applications

Abstract

The effect of B 2 O 3 addition on the microwave dielectric properties and microstructure of Li 2 ZnTi 3 O 8 ceramics prepared using conventional solid-state reaction was investigated for low-temperature co-fired ceramic (LTCC) applications. X-ray diffraction and scanning electron microscopy were used to investigate the effect of B 2 O 3 addition on the sintering process. The Li 2 ZnTi 3 O 8 ceramic sintered at 875°C with 0.5 wt% B 2 O 3 for 4 h showed good microwave dielectric properties including e r = 25, Q 9 f = 50,917 GHz, and τ f = À17.8 ppm/°C. Silver was found to be unreactive toward the 0.5 wt% B 2 O 3 doped Li 2 ZnTi 3 O 8 ceramic under the above sintering conditions.

Microwave dielectric properties of B2O3-added Li2MgTiO4ceramics for LTCC applications

“…Several methods can be adopted to lower sintering temperature, such as using a fine particle powder, [6] a chemical process, [7] or sintering additives. [8,9] Addition of a sintering additive, which is the easiest way to lower the sintering temperature, allows for the formation of a liquid phase that enhances grain growth. The dense structure thus formed improves the microwave dielectric properties.…”

“…B 2 O 3 is an effective sintering additive to lower sintering temperature. [8,9] In this study, the effects of the B 2 O 3 additive on the sintering behavior, microstructure, and microwave dielectric properties of LMT ceramics were studied. The B 2 O 3 additive lowered the sintering temperature to 925°C and a LMT ceramic with 8 wt% B 2 O 3 sintered at 925°C for 4 h was found to possess optimum microwave dielectric properties.…”