Abstract
MgTiO3‐doped BaZr0.35Ti0.65O3 (BZT) composite ceramics have been prepared by the conventional solid‐state route. The dielectric nonlinear characteristics and relaxor behavior of these composite ceramics have been investigated. The secondary‐phase BaMg6Ti6O19 is formed among BZT composite ceramics with the increase of MgTiO3. BZT composite ceramics show typical diffuse phase transition characteristic and ferroelectric relaxor behavior. The dielectric constant of BZT composite ceramics can be tailored from thousands to hundreds by manipulating the addition of MgTiO3. The dielectric loss still keeps around 0.001 and the tunability is above 20% at a dc‐applied electric field of 25 kV/cm. Suitable dielectric constant, low dielectric loss, and high tunability of this kind of composite ceramics can be useful for potential microwave tunable applications.
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