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Nanocrystalline powders of chromium and aluminum co-substituted zinc ferrites with general formula ZnFe 2−2x Cr x Al x O 4 (0⩽x⩽1) have been synthesized for the first time. Using the sol-gel auto-combustion technique and the tartaric acid as combustion-complexion agent, materials with spinel mono-phase cubic spinel structure were successfully prepared...
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