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

•Dense BaTiO3–Ni composites can be achieved by microwave sintering.•Grain size is uniform in all samples with the different Ni contents.•Dielectric constant of BaTiO3–Ni nanopowder shows high value with low tangent loss.•Breakdown strength and figure of merits also shows high value in nanopowder.

In this paper, barium titanate–nickel composite (BaTiO3–Ni) was synthesized using a sol–gel method and sintered by microwave furnace. Microwave sintering of BaTiO3–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 BaTiO3 and Ni. The morphologies of sintered BaTiO3–Ni using Ni nanopowder and paste were characterized by FE-SEM. Microwave sintered BaTiO3–Ni nanopowder showed dielectric response of ϵr ∼13,500 with tangent loss 0.04 at 10 kHz at room temperature being higher dielectric constant with less tangent loss as compared to BaTiO3–Ni paste. BaTiO3–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.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide