A new group of microwave dielectric ceramics in the RE(Ti0.5W0.5)O4 [RE=Pr, Nd, Sm, Gd, Tb, Dy, and Y] system

RE(Ti_0.5W_0.5)O₄ [RE=Pr, Nd, Sm, Gd, Tb, Dy, and Y] ceramics have been prepared as single-phase materials by a conventional solid-state ceramic route. The ceramics have been characterized by X-ray diffraction and microwave methods. The RE(Ti_0.5W_0.5)O₄ ceramics showed an increase in cell volume and a corresponding decrease in density with ionic radius of RE³⁺ ions. The dielectric constant varies from 21 to 25, Q_u×f from 6000 to 11 000 GHz and _f from –5 to –22 ppm °C^–1. The microwave dielectric properties indicate that these materials are possible candidates for dielectric resonator as well as substrate applications in microwave integrated circuits.