Synthesis, crystal structure, and microstructure analysis of perovskite-type compounds LnCo0.95Ni0.05O3 (Ln = La, Pr, Nd, Sm, Gd, and Dy)

被引：14

作者：

Aguirre, M. H. ^{[1
]}

Robert, R. ^{[1
]}

Logvinovich, D. ^{[1
]}

Weidenkaff, A. ^{[1
]}

机构：

[1] Empa, Swiss Fed Labs Mat Testing & Res, CH-8600 Dubendorf, Switzerland

来源：

INORGANIC CHEMISTRY | 2007年 / 46卷 / 07期

关键词：

D O I：

10.1021/ic0623821

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The crystal structure and the microstructure of LnCo(0.95)Ni(0.05)O(3) compounds, synthesized by a soft chemistry process, were studied. Synchrotron and laboratory X-ray diffraction data of LnCo(0.95)Ni(0.05)O(3) (Ln = Pr, Nd, Sm, Gd, and Dy) can be refined in the Pbnm space group (SG). The orthorhombic symmetry has been confirmed by transmission electron microscopy. The X-ray diffraction data of LaCo0.95Ni0.05O3 can be fitted with rhombohedral R (3) over barc and monoclinic I2/a SG. The comparison of experimental electron diffraction with theoretical simulation showed the monoclinic symmetry for the La compound has a better match than that of the rhombohedral symmetry. The Pr compound has shown to have a three-dimensional microdomain texture in which the orientation of the real unit cell, i.e., similar to root 2a(p) x root 2a(p) x 2a(p) (where a(p) is the lattice parameter of the aristotype Pm (3) over barm perovskite, noted with a "p" subscript), alternates in each domain in one of the three space directions.

引用

页码：2744 / 2750

页数：7

共 20 条

[11] SOME STRUCTURES TOPOLOGICALLY RELATED TO CUBIC PEROVSKITE (E21), REO3 (DO9) AND CU3AU(L12) [J].

OKEEFFE, M ;

HYDE, BG .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1977, 33 (DEC) :3802-3813

[12]

Radaelli PG, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.094408

[13] Nanostructured complex cobalt oxides as potential materials for solar thermoelectric power generators [J].

Robert, R ;

Romer, S ;

Reller, A ;

Weidenkaff, A .

ADVANCED ENGINEERING MATERIALS, 2005, 7 (05) :303-308

[14] Synthesis and high-temperature thermoelectric properties of Ni and Ti substituted LaCoO3 [J].

Robert, R. ;

Bocher, L. ;

Trottmann, M. ;

Reller, A. ;

Weidenkaff, A. .

JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (12) :3893-3899

[15] RECENT ADVANCES IN MAGNETIC-STRUCTURE DETERMINATION BY NEUTRON POWDER DIFFRACTION [J].

RODRIGUEZCARVAJAL, J .

PHYSICA B, 1993, 192 (1-2) :55-69

[16] Disruption of extended defects in solid oxide fuel cell anodes for methane oxidation [J].

Ruiz-Morales, JC ;

Canales-Vázquez, J ;

Savaniu, C ;

Marrero-López, D ;

Zhou, WZ ;

Irvine, JTS .

NATURE, 2006, 439 (7076) :568-571

[17] EMS - A SOFTWARE PACKAGE FOR ELECTRON-DIFFRACTION ANALYSIS AND HREM IMAGE SIMULATION IN MATERIALS SCIENCE [J].

STADELMANN, PA .

ULTRAMICROSCOPY, 1987, 21 (02) :131-145

[18] THE ASNO3 (A=CA, SR) PEROVSKITES [J].

VEGAS, A ;

VALLETREGI, M ;

GONZALEZCALBET, JM ;

ALARIOFRANCO, MA .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1986, 42 :167-172

[19] Microstructure and the influence of spontaneous strain in LaCoO3, La0.8Sr0.2CoO3 and La0.8Ca0.2CoO3 [J].

Walmsley, JC ;

Bardal, A ;

Kleveland, K ;

Einarsrud, MA ;

Grande, T .

JOURNAL OF MATERIALS SCIENCE, 2000, 35 (17) :4251-4260

[20] Local lattice distortion during the spin-state transition in LaCoO3 [J].

Yamaguchi, S ;

Okimoto, Y ;

Tokura, Y .

PHYSICAL REVIEW B, 1997, 55 (14) :R8666-R8669

← 1 2 →