Synthesis and characterization of the ceramic system LaxNd1−xNiO3−δ (0⩽x⩽0.5)

• Published in: Journal of solid state chemistry Vol. 171; no. 1-2; pp. 195 - 200
• Main Authors: Fernandes, J.D.G., Silva, Z.R., Melo, D.M.A., Silva, A.O., Santos, Z.L., Zinner, L.B., Gomes, D.K.S., Alves, C.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: San Diego, CA Elsevier Inc 15-02-2003; Elsevier
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Electrotechnical and electronic ceramics; Exact sciences and technology; La1−xNdxNiO3; Oxygen deficiency; Perovskite; Technical ceramics; Perovskite; La1−xNdxNiO3; Oxygen deficiency; Perovskite type compound; Neodymium oxides; Thermogravimetry; La1-xNdxNiO3; Experimental study; Solid solution; X ray diffraction; Oxide ceramics; Powder; Lanthanum oxide; Lanthanide compound; Characterization; Nanometer scale; Transition metal compounds; Chemical preparation; Chemical composition; Manufacturing; Infrared spectrum; Nickel oxide; Electroceramics
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/S0022-4596(02)00208-6

Lanthanum and neodymium nickelate (LaxNd1−xNiO3−δ) with x equal to 1.0, 0.9, 0.7 and 0.5 were prepared with molar ratios of 1:1.5 and 1:3. The resins were heated at 300°C for 2h and then calcinated at 800°C for 12h. The resulting powders were analyzed by thermogravimetry, infrared spectroscopy and X-ray powder diffraction. Chemical analysis of the powders showed that the oxygen vacancy number (δ) becomes higher with the substitution of lanthanum by neodymium for both molar ratios. X-ray patterns showed the formation of perovskite in all samples analyzed. Nevertheless, a small amount of a secondary phase was observed when neodymium content increases in the oxides. This phase was attributed to NiO.