Correlation of La0.8Sr0.2MnO3-δ Powder Synthesis Routes and High Temperature Electrical Properties

Lanthanum strontium manganate (LSM) powders were synthesized utilizing high temperature solid-state calcination and co-precipitation methods. The powders were characterized by various techniques such as by X-Ray diffraction (XRD), BET surface area, laser scattering particle size analyzer, scanning electron microscopy (SEM), and ICP spectrometer. Selected LSM powders were then formulated to make tapes of various thickness. Tape layers were laminated and fired to form a dense substrate of LSM. The temperature dependence of electrical conductivity of fired substrates was measured using four-point probe method. The correlation between the powder synthesis route and the electrical properties is investigated.