Structural, chemical and dielectric properties of ceramic injection moulded Ba(Zn1/3Ta2/3)O3 microwave dielectric ceramics

We report the development of a ceramic injection moulding (CIM) process to produce complex-shaped structures using high-performance microwave ceramic materials. In particular, we describe the synthesis methods and the structural, chemical and dielectric properties of Ba(Zn1/3Ta2/3)O3 (BZT) doped with Ni and Zr ceramics produced using ceramic injection moulding. Sintering the ceramic injection moulded Ba(Zn1/3Ta2/3)O3 to a relative density of ∼94% was possible at a temperature of 1680 °C and a time of 48 h. The best samples to date exhibit a dielectric constant, ɛr, of ∼30, a Q value, of ∼31,250 (i.e. tan δ < 3.2 × 10−5) at 2 GHz, and a temperature coefficient of resonance frequency, τf, of 0.1 ppm/°C.