STRUCTURAL INVESTIGATIONS ON (BAXSR1-X)(ZRYTI1-(Y-DELTA)O-3 DIELECTRIC RESONATOR COMPOUNDS USED FOR MICROWAVE APPLICATIONS(DELTA)TA)

Structural investigations on 4BO(3) type perovskite dielectric resonat or (DR) compounds, namely (Ba0.29Sr0.71) (Zr0.973Ti0.027)O-3 [BSZT] an d (Ba0.29Sr0.71)(Zr0.951Ti0.039Ta0.01)O-3 [BSZTTa] were carried out us ing X-ray Rietveld method. The structures were found to be isostructur al with SrZrO3 and belong to the space group Pbnm. In both the structu res, the tilt angles of the BO6 octahedra were lower than that in SrZr O3. The volume of the octahedron was comparable for all the three. Whe n Ta was substituted in BSZT, dielectric resonator properties of the r esulting product BSZTTa improved substantially.