Thin films of bismuth vanadates with modifiable conduction properties

被引：36

作者：

Barreca, D

Depero, LE

Di Noto, V

Rizzi, GA

Sangaletti, L

Tondello, E

机构：

[1] Univ Padua, Dipartimento Chim Inorgan Metallorgan & Analit, CNR, Ctr Studio Stabil & Reatt Composti Coordinaz, I-35131 Padua, Italy

[2] Univ Brescia, Dipartimento Chim & Fis Mat, I-25123 Brescia, Italy

来源：

CHEMISTRY OF MATERIALS | 1999年 / 11卷 / 02期

关键词：

D O I：

10.1021/cm980725q

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thin films of bismuth vanadates are deposited by chemical vapor deposition (OVD) on alpha-Al2O3 substrates using an O-2 atmosphere and vanadyl(IV) acetylacetonate and triphenyl-bismuth as precursors. The microstructure of the samples is studied by XRD and Raman spectroscopy and their chemical composition is investigated by XPS and SIMS. AFM is used to analyze the surface morphology of the samples. All the samples show a nonohmic behavior beyond a threshold voltage, V-th, which is linearly dependent on the V4+/V5+ ratio. Impedance spectroscopy measurements indicate that the obtained samples are oxide ion conductors at room temperature and that the mechanism of ion conduction occurs by means of hopping between vacancies. Furthermore, ferroelectric-paraelectric transitions take place in the materials at low temperatures.

引用

页码：255 / 261

页数：7

共 44 条

[1] THE BIMEVOX SERIES - A NEW FAMILY OF HIGH PERFORMANCES OXIDE ION CONDUCTORS [J].

ABRAHAM, F ;

BOIVIN, JC ;

MAIRESSE, G ;

NOWOGROCKI, G .

SOLID STATE IONICS, 1990, 40-1 (pt 2) :934-937

[2] On new mixed conductors of Bi4V2-xMnxO11-delta formulation [J].

Alga, M ;

Wahbi, M ;

Ammar, A ;

Tanouti, B ;

Grenier, JC ;

Reau, JM .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 256 (1-2) :234-243

[3]

[Anonymous], 1989, EQUIVALENT CIRCUIT E

[4]

[Anonymous], 1966, STRUCTURE PROPERTIES

[5] Surface aspects of bismuth-metal oxide catalysts [J].

Arora, N ;

Deo, G ;

Wachs, IE ;

Hirt, AM .

JOURNAL OF CATALYSIS, 1996, 159 (01) :1-13

[6]

ARRECA D, IN PRESS

[7] THE CORRELATION OF THE ELECTRICAL AND OPTICAL-PROPERTIES OF THIN-FILMS OF V2O5-BI2O3 [J].

ARSHAK, K ;

PERREM, R .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1993, 26 (07) :1098-1102

[8]

BARRECA D, 1997, ELECTROCHEM SOC P, V97, P952

[9] On the partial oxidation of propane and propylene on mixed metal oxide catalysts [J].

Bettahar, MM ;

Costentin, G ;

Savary, L ;

Lavalley, JC .

APPLIED CATALYSIS A-GENERAL, 1996, 145 (1-2) :1-48

[10] STRUCTURAL MODELING IN THE MO-BI-O SYSTEM [J].

DEPERO, LE ;

SANGALETTI, L .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 119 (02) :428-431

← 1 2 3 4 5 →