Abstract
In this present work, we investigated the influence of the parameters used in laser sintering on the microstructures and electrical properties of the La-doped barium titanate. The structure and property of the ceramics were investigated by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Raman Spectroscopy (RS), Condutivite Atomic Force Microscopy (C-AFM) and Impedance Spectroscopy (IS). All samples have a Positive Temperature Coefficient Resistors (PTCR), as well as the IS data revealed a PTCR effect on the micro-region of BT:La ceramics grains. Electrical properties showed a strong dependence on heating and cooling rates, wich room-temperature resistivity (around 104 to 3.105 Ω.cm).
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