Abstract

• Mn doped ZnO ceramics are prepared in solid state reaction method and conventional funance annealing process. Mn (2 mol, 4 mol, 6 mol, 8mol & 10mol) are doped into ZnO, and heat treated at 500oC (melting point of Mn is 535oC) for 3 hrs. After pre heat treated at 500oC, samples are heat treated again at 1100oC for 2 hrs. XRD investigations are carried out to determine the structural properties, such as lattice parameters, crystalline size and micro strain of the samples. Mn doped ZnO ceramics are prepared as varistors and non-linear coefficients of varistors are studied. Optical band gaps of the ceramic samples are also determined.