High-performance electrical properties of La-based perovskite ceramics for the functional phase of thick film resistors

In order to explore an economical functional phase alternative material for thick film resistors, the crystal structure, microstructure, and electrical properties of (1-x)La0.5Sr0.5Co0.96Ni0.04O3-δ + xLaCo0.4Ni0.58Zn0.02O3 (x = 0.0–1.0) composite ceramics were studied through solid-state reaction experiments. The characterized by x–ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron DC four–probe method. Results suggested that main phases La0.5Sr0.5Co0.96Ni0.04O3-δ LaCo0.4Ni0.58Zn0.02O3 formed, along with a small part impurity phases. addition decreased conductivity changed temperature coefficient resistance from positive negative. Zero could be achieved around 0.6 < x 0.8 relatively low absolute values obtained samples 0.4 ≤ 0.8. ceramic 0.6La0.5Sr0.5Co0.96Ni0.04O3-δ 0.4LaCo0.4Ni0.58Zn0.02O3 showed optimal performances 1923 S/cm, 379.54 ppm/°C, relative density 95.05%.