Study on properties of Ca0.9La0.067TiO3-0.01Al2O3 ceramics reinforced PSAE/fiber composite substrate with high εr

A “self-permeation” method was used to fabricate a Ca 0.9 La 0.067 TiO 3 -0.01Al 2 O 3 (CLT)-reinforced polysilylaryl-enyne/fiber multilayer board with different volume fractions of CLT (0–40 vol%). The microstructure, dielectric, mechanical, and thermal properties were fully studied. The results showed that the composite with optimal dielectric properties (ε r ∼8.75, tanδ∼0.0043) could be obtained when the volume fraction of CLT reached 30 vol%. Meanwhile, the thermal conductivity reached a high level of 0.644 W/(m·K) and 0.762 W/(m·K) at Z and X/Y directions, respectively. Due to the high decomposition temperature of PSAE, T d5 (the temperature corresponding to 5% weight loss) of composite loading with 30 vol% CLT was higher than 900℃, which indicates an excellent thermal resistance. And the bending strength could reach 115.3 MPa indicating excellent mechanical property. The novel polysilylaryl-enyne/fiber/Ca 0.9 La 0.067 TiO 3 -0.01Al 2 O 3 multilayer board with excellent performance is expected to be a candidate material for print circuit boards and widely used in the microwave communication field.