Preparation and dielectric characterization of BaLaAlO4 ceramics

In the present work, BaLaAlO₄ ceramics with orthorhombic structure similar to K₂SO₄ in space group P2₁2₁2₁ were prepared by a solid state sintering process. The dense BaLaAlO₄ ceramics with minor amount of secondary phase have a low dielectric loss and a temperature stable dielectric constant with obvious frequency dependence. A dielectric constant around 15 was obtained at 12 GHz in the present ceramics together with a Qf value over 5,000 GHz.