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FTIR and Raman spectroscopic study of a complex perovskite: Ca0.91-xCe0.09Rb0.04Csx [(Zr0.50Ti0.45)Al0.05]O3, x=0.2 to 0.4, dedicated for radioactive waste confinement

Hasnat K., Kamel N., Moudir D., Mouheb Y., Kamariz S., Arabi A.

Advances in Materials Science

2020

Vol. 20, nr 2(64)

81--94

Perovskite is able to sequester simultaneously, in its structure, both actinides and alkaline-earth elements. This study is an attempt to synthesize a complex perovskite Ca0.91-xCe0.09Rb0.04Csx [(Zr0.50Ti0.45)Al0.05]O3 (0.2≤x≤0.4), doped in the same time, with Ce, Cs and Rb. The synthesis is conducted by sintering at 1150°C during 16h. XRX analysis confirms the perovskite formation. SEM observations show a less porous microstructure. FTIR analysis reveals TiO6, Ti-O-Ti, Ti-O and Zr-O vibrations. Raman spectroscopy indicates many orthorhombic perovskite active modes, as: Ti-O6 and Ti-O3 torsions, ZrO7, CaO8 vibrations, the totally symmetric oxygen, and the O-octahedron cage rotation.