Dielectric response on microwave sintered BaTiO3 composite with Ni nanopowder and paste

Abstract In this paper, barium titanate–nickel composite (BaTiO 3 –Ni) was synthesized using a sol–gel method and sintered by microwave furnace. Microwave sintering of BaTiO 3 –Ni (nanopowder and paste) was carried out at 1100 °C for 20 min to get dense composites. XRD was performed to confirm the phases of BaTiO 3 and Ni. The morphologies of sintered BaTiO 3 –Ni using Ni nanopowder and paste were characterized by FE-SEM. Microwave sintered BaTiO 3 –Ni nanopowder showed dielectric response of ϵ r ∼13,500 with tangent loss 0.04 at 10 kHz at room temperature being higher dielectric constant with less tangent loss as compared to BaTiO 3 –Ni paste. BaTiO 3 –Ni composites can not only be sintered densely at a lower temperature with rather shorter time, but also the grain growth can be suppressed by microwave sintering.