Low-sintering ceramic materials based on Bi2O3–ZnO–Nb2O5 compounds

In this work, sintering behaviour of Bi2O3–ZnO–Nb2O5 compounds was investigated in order to develop LTCC materials with suitable microwave properties. Structure, dielectric properties and sintering were studied for ceramic dielectrics based on the system: Bi2ZnNb2O9 with the pyrochlore structure and ZnNb2O6 with a columbite one. The work was carried out over a wide range of initial components concentration. Ceramic samples of these materials were prepared by the mixed oxide technique. The effect of adding glass to the materials have been discussed. The sintering behaviour, dielectric permittivity, quality factor and crystal structures have been characterized for ceramic samples depending on compositions. Low-temperature co-firable ceramic material with ɛ ∼ 30, τɛ = 0 and Q × f = 3500 GHz based on the above system was synthesized.