PbFe12-xO19-δ (x= 0, 0.25, 0.50, 0.75 & 0.1) ceramics are synthesized via sol-gel auto-combustion technique and sintered at a temperature of 900°C for 45 min. using microwave furnace. The XRD confirms the M-type hexagonal phase and the crystallite size arefound to be varying between 11-45 nm. High dielectric constant (ϵr) of 140.09 and low loss (tan δ) of 0.057 are noticed at 5 MHz which makes these hexaferrites suitable for high capacity condenser and low electric noise device manufacturing applications. © 2016 Author(s).