Microwave dielectric properties of (Ca0.8Sr0.2)(SnxTi1−x)O3 ceramics

In this paper, we study the behavior of the B-site behavior with the incorporation of Sn4+ ion in (Ca0.8Sr0.2)TiO3 ceramics. An excess of Sn4+ resulted in the formation of a secondary phase of CaSnO3 and SrSnO3 affecting the microwave dielectric properties of the (Ca0.8Sr0.2)(SnxTi1−x)O3 ceramics. The dielectric properties of the (Ca0.8Sr0.2)(SnxTi1−x)O3 ceramics were improved because of the solid solution of Sn4+ substitution in the B-site. The temperature coefficient of resonant frequency (τf) of the (Ca0.8Sr0.2)(SnxTi1−x)O3 ceramics also improved with increasing Sn content.

► New microwave dielectric properties of (Ca0.8Sr0.2)(SnxTi1−x)O3 ceramics were investigated.
► A single-phase solid solution containing orthorhombic Pbnm with different Sn contents was formed.
► A significant improvement of Q × f value and τf were achieved by (Ca0.8Sr0.2)(SnxTi1−x)O3 system.
► Second phases were formed and affected the dielectric properties of (Ca0.8Sr0.2)(SnxTi1−x)O3 system.
► Low cost and suitable τf value of (Ca0.8Sr0.2)(SnxTi1−x)O3 demonstrate a good potential for use in microwave device.