Some Features of the Reduction Process from CrVO4to CrVO3

✍ Scribed by Irma L. Botto; Marta B. Vassallo; Manlio Occhiuzzi; Dante Cordischi; Piero Porta

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 251 KB
• Volume: 144
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8177

✦ Synopsis

The reduction process from CrVO 4 to CrVO 3 was investigated by temperature programmed reduction; thermogravimetry; XRD, IR, and ESR spectroscopies; and SEM microscopy. This detailed analysis shows that the corundum-type CrVO 3 mixed oxide forms from 900 K and suggests as an intermediate stage the incorporation of Cr III in a VO 2 rutile type phase. The absence of the V 2 O 3 typical free-carrier behavior could result from the Cr III in the lattice and it is clearly revealed by IR spectroscopy.