Direct ink writing of bismuth molybdate microwave dielectric ceramics

Additive manufacturing via direct ink writing and microwave dielectric characterisation of commercially produced low sintering temperature bismuth molybdenum oxide ceramics, have been both performed for the first time, following a powder-to-product holistic approach. We demonstrated that is an excellent candidate producing substrates to be used wireless telecommunication applications operating at (MW) frequencies, with great repeatability properties comparable ceramics fabricated conventional processing routes. The optimum density (relative ?r ? 93%) 3D printed test samples was obtained by 660 °C 2 h, resulting in relative permittivity ?r = 35.7, loss tan? 0.0004 quality factor Q × f 14,928 GHz. Sintering higher temperatures promoted porosity increase due mismatching grain growth mechanisms phase decomposition, collectively hindered samples’ performance terms achievable (?r) (tan?).