Sintering behavior and properties of MgTiO3/CaO-B2O3-SiO2 ceramic composites for LTCC applications

Abstract In this study , a new-type dielectric substrate composed of MgTiO 3 /CaO-B 2 O 3 -SiO 2 (CBS) dielectric ceramic composites was prepared via solid-state reaction. The sinterability, crystalline composition, microstructure, dielectric performance and mechanical property of the synthesized ceramic composites were determined. As high performance dielectrics, MgTiO 3 ceramics significantly promoted the dielectric performance of the ceramic composites, but also effectively promoted the bulk density and mechanical performance of the composites. The composite sample containing 40 wt% MgTiO 3 sintered at 830 °C for 60 min showed superior performance, which comprised a relatively-high bulk density, dielectric constant (e r ) of 10.85, dielectric loss (tanδ) of 3.3 × 10 −4 and volume resistivity (ρ v ) of 8.03 × 10 11 Ω cm at 1 MHz, and flexural strength (σ f ) of 214.85 MPa.