Abstract

• Analar grade PbO and MnO2 are weighted by the stoichiometric compositions, (1 - x) PbO + (x) MnO2, where x = 0.10, 0.15, 0.20, 0.25 and 0.30 respectively. Two starting materials, PbO and MnO2 are mixed and grinded by agate mortar for each 3 hrs. Then, the mixture are heat treated at 500°C for each 3 hrs. After that, the mixture are grinded again by agate mortar. Finally, the mixture are heat treated at 700°C for each 3 hrs. All heat treatment schedules are solid state sintering processes. XRD technique is used to examine the structural properties and phase formation of the ceramic samples. From the XRD analyses, the variations of dopant concentrations with the structural properties are studied. In addition, dielectric properties of the ceramics samples are also investigated.