Structural, optical, magnetic, and electrical properties of nanospinels containing different molar ratios of cobalt and aluminum ions
作者： Emad M Masoud , A-A El-Bellihi , WA Bayoumy , Eman S Abdelazeem , None
DOI: 10.1007/S11581-017-2091-0
关键词:
摘要: Aluminum substituted by cobalt of aluminates having a nominal composition CoCo x Al2-x O4, where x = 0, 0.5, 1, 1.5, and 2, were synthesized the thermal decomposition complex precursors derived from metal nitrate salts glycine. All samples characterized using different techniques, XRD, FT-IR, TG, DTA, DSC, TEM. XRD showed that all have spinel cubic crystal structure. Using Debye–Scherrer formula, calculated crystallite size was found concentration dependent varied between 21 32 nm. Lattice parameter, X-ray density, porosity, unit cell volume to show effect Al3+ substitution on structure investigated samples. Cation distribution oxygen content into specific stoichiometry calculated. The optical, magnetic, electrical properties also studied. nano aluminate (x = 0.5) Co/Al molar ratio 1 highest values saturation magnetization (M s = 1.1 emu g−1) conductivity (3.1 × 10–8 Ω−1 cm−1) compared other ones. color parameters (L*, a*, b*) measured. results collected discussed.
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