Electrochemical synthesis and characterization of a NdCo5 permanent magnet

被引：37

作者：

Abdelkader, A. M. ^{[1
]}

Hyslop, D. J. S. ^{[1
]}

Cox, A. ^{[1
]}

Fray, D. J. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2010年 / 20卷 / 29期

基金：

英国工程与自然科学研究理事会;

关键词：

MOLTEN CALCIUM-CHLORIDE; NEODYMIUM-IRON ALLOYS; ELECTRICAL-CONDUCTIVITY; TRANSPORT-PROPERTIES; TITANIUM-DIOXIDE; REDUCTION; OXIDES; ELECTROLYSIS; BINARY; SYSTEM;

D O I：

10.1039/c0jm00096e

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：

NdCo5 was produced in a simple one-stage process by electro-deoxidising an inexpensive single phase solid oxide solution of Nd2O3 and Co3O4. The reduction was performed in molten CaCl2 at 900 degrees C and the cell operated at 3.1 V at a cathodic current density of 170 mA cm(-2) for 12 hours. The magnetic properties of the product, measured using a vibrating magnetometer, closely matched that of pure and homogenous NdCo5. The reaction mechanism at the cathode is elucidated from partially reduced samples using electron microscopy, X-ray diffraction analysis and conductivity measurements.

引用

页码：6039 / 6049

页数：11

共 37 条

[1]

ABDELKADER AM, 2009, P MS T 09 C, P1961

[2] Direct electrochemical preparation of Nb-10Hf-1Ti alloy [J].

Abdelkader, Amr M. ;

Fray, Derek J. .

ELECTROCHIMICA ACTA, 2010, 55 (08) :2924-2931

[3] Oxides of the AMO3 and A2MO4-type:: structural stability, electrical conductivity and thermal expansion [J].

Al Daroukh, M ;

Vashook, VV ;

Ullmann, H ;

Tietz, F ;

Raj, IA .

SOLID STATE IONICS, 2003, 158 (1-2) :141-150

[4] Microstructural kinetics of phase transformations during electrochemical reduction of titanium dioxide in molten calcium chloride [J].

Alexander, D. T. L. ;

Schwandt, C. ;

Fray, D. J. .

ACTA MATERIALIA, 2006, 54 (11) :2933-2944

[5] MAGNETOSTRICTION OF THE NDCO5 UNIAXIAL PERMANENT-MAGNET [J].

ALGARABEL, PA ;

DELMORAL, A ;

IBARRA, MR ;

SOUSA, JB ;

MOREIRA, JM ;

MONTENEGRO, JF .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1987, 68 (02) :177-189

[6] HIGH-FIELD MAGNETIZATION OF NDCO5 AND NDCO5H3 SINGLE-CRYSTALS [J].

BARTASHEVICH, MI ;

GOTO, T ;

YAMAGUCHI, M ;

YAMAMOTO, I ;

RADWANSKI, RJ .

SOLID STATE COMMUNICATIONS, 1993, 87 (12) :1093-1095

[7] LOCALIZED-TO-ITINERANT ELECTRON TRANSITIONS IN RARE-EARTH COBALTATES [J].

BHIDE, VG ;

RAO, CNR ;

RAO, GR ;

RAO, GVS ;

RAJORIA, DS ;

REDDY, YS .

PHYSICAL REVIEW LETTERS, 1972, 28 (17) :1133-&

[8] Direct electrochemical reduction of titanium dioxide to titanium in molten calcium chloride [J].

Chen, GZ ;

Fray, DJ ;

Farthing, TW .

NATURE, 2000, 407 (6802) :361-364

[9] Thermodynamic assessment of the Co-O system [J].

Chen, M ;

Hallstedt, B ;

Gauckler, LJ .

JOURNAL OF PHASE EQUILIBRIA, 2003, 24 (03) :212-227

[10] OXYGEN-ION MIGRATION IN PEROVSKITE-TYPE OXIDES [J].

CHERRY, M ;

ISLAM, MS ;

CATLOW, CRA .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 118 (01) :125-132

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