Some features of the reduction process from CrVO4 to CrVO3

被引：5

作者：

Botto, IL

Vassallo, MB

Occhiuzzi, M

Cordischi, D

Porta, P

机构：

[1] Univ Rome La Sapienza, Dipartimento Chim, CNR, Ctr Struttura & Attiv Catalit Sistemi Ossidi, I-00185 Rome, Italy

[2] Natl Univ La Plata, Fac Ciencias Exactas, CEQUINOR, RA-1900 La Plata, Argentina

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1999年 / 144卷 / 02期

关键词：

TPR; IR spectroscopy; chromium vanadates;

D O I：

10.1006/jssc.1999.8177

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reduction process from CrVO4 to CrVO3 was investigated by temperature programmed reduction; thermogravimetry; XRD, IR, and ESR spectroscopies; and SEM microscopy, This detailed analysis shows that the corundum-type CrVO3 mixed oxide forms from 900 K and suggests as an intermediate stage the incorporation of Cr-III in a VO2 rutile type phase, The absence of the V2O3 typical free-carrier behavior could result from the Cr-III in the lattice and it is clearly revealed by IR spectroscopy. (C) 1999 Academic Press.

引用

页码：392 / 397

页数：6

共 20 条

[1]

ADLER D, 1975, TREATISE SOLID STATE, V2, P237

[2]

BARAN EJ, 1988, J MATER SCI, V33, P2479

[3] IR spectra of VO2 and V2O3 [J].

Botto, IL ;

Vassallo, MB ;

Baran, EJ ;

Minelli, G .

MATERIALS CHEMISTRY AND PHYSICS, 1997, 50 (03) :267-270

[4] TEMPERATURE-PROGRAMMED REDUCTION OF V2O5 AND COPRECIPITATED V2O5-TIO2 BY HYDROGEN [J].

BRIAND, LE ;

GAMBARO, L ;

THOMAS, H .

JOURNAL OF THERMAL ANALYSIS, 1995, 44 (04) :803-821

[5] Synthesis and some properties of the phase Cr2V4O13 [J].

Filipek, E ;

Walczak, J ;

Tabero, P .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 265 (1-2) :121-124

[6]

FLOKE OW, 1970, J SOLID STATE CHEM, V1, P445

[7] THE INFLUENCE OF GRAIN-SIZE ON THE MAGNETIC INTERACTION IN ANTI-FERROMAGNETIC ALPHA-CR2O3 [J].

GERLING, R ;

DRAGER, K .

SURFACE SCIENCE, 1981, 106 (1-3) :427-431

[8]

HYDE B, 1989, INORGANIC CRYSTAL ST, P157

[9]

JONES A, 1986, TEMPERATURE PROGRAMM, P113

[10]

LAMPEONNERUD C, 1995, EUR J SOL STATE INOR, V32, P293

← 1 2 →