Microwave metathetic approach for the synthesis and characterization of ZnCr2O4

✍ Scribed by Purnendu Parhi; V. Manivannan

• Book ID: 104022832
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 565 KB
• Volume: 28
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2007.11.005

✦ Synopsis

A novel way to synthesize technologically important ZnCr 2 O 4 by microwave metathetic approach using simple precursors such as ZnCl 2 and Na 2 Cr 2 O 7 is described. A proof for the reaction proceeding via metathetic route has been clearly established by XRD diffraction studies. ZnCr 2 O 4 , belonging to the "spinel" class of materials, is characterized by multiple techniques to establish structure-property relationship. The band gap of ZnCr 2 O 4 is determined to be 3.4 eV, and the ceramic oxide shows anti-ferromagnetic transition (T N ) at -261.5 • C. The substitution of Fe into ZnCr 2 O 4 (ZCR) results in Fe replacing Cr.