Microwave dielectric properties of Nd[(Zn1−xCox)0.5Ti0.5]O3 (0.025 ≤ x ≤ 0.1) ceramics

Microwave dielectric properties of Nd[(Zn1−xCox)0.5Ti0.5]O3 (0.025 ≤ x ≤ 0.1) ceramics have been investigated. Solid solutions were formed for the ceramic system in the given compositional range. With x increasing from 0.025 to 0.1, dielectric constant value (ɛr) decreased slightly from 33.4 to 32.2, and τf value increased from −30.3 to −31.9 ppm/°C. Dielectric loss of the Nd(Zn0.5Ti0.5)O3 ceramics could be decreased by the small amount of Co substitution. Excellent microwave dielectric properties of ɛr = 32.6, Q × f = 185,300 GHz and τf = −31.3 ppm/°C were obtained for the Nd[(Zn0.925Co0.075)0.5Ti0.5]O3 (x = 0.075) ceramics sintered at 1390 °C for 4 h.