A novel BaMg1.98Zn0.02V2O8 ceramic with low dielectric loss and good temperature stability for low temperature co-fired ceramic technology

In this paper, a series of BaMg_2-xZn_xV₂O₈ (0.02 ≤ x ≤ 0.08) ceramic has been obtained by ionic substitution at the Mg-site of BaMg₂V₂O₈ ceramics through the conventional solid-state reaction method. The relationship between the surface morphology and the microwave properties of ceramic samples was analyzed intensively. The results showed that the substitution of Mg²⁺ by an appropriate amount of Zn²⁺ can promote their densification, lower their sintering temperature, and reduce the dielectric loss of BaMg₂V₂O₈ ceramics significantly. The BaMg_1.98Zn_0.02V₂O₈ ceramic exhibits microwave dielectric properties as ε_r ～13.4, Q × f ～ 178,760 GHz, τ_f ～ -14.9 ppm/°C at the optimum sintering temperature (940 °C). This indicates that the ceramic prepared in this work, which combines low dielectric loss, good temperature stability, and low-temperature sintering ability, can be an ideal microwave dielectric material for low-temperature co-firing technology.