Crystal structure refinement of La0.683(Ti0.95Al0.05)O3 perovskite by the Rietveld method

被引：16

作者：

Ali, R

Yashima, M

Yoshimura, M

Yoshioka, H

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Mat Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan

[2] Tokyo Inst Technol, Ctr Mat Design, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[3] Hyogo Prefectural Inst Ind Res, Kobe, Hyogo 6540037, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2001年 / 84卷 / 02期

关键词：

D O I：

10.1111/j.1151-2916.2001.tb00682.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The structural parameters of orthorhombic and tetragonal phases (space group Plmmm and p4/mmm) of A-site deficient La-0.683(Ti0.95Al0.05)O-3 pervoskite have been refined by Rietveld analysis through the X-ray powder diffraction patterns measured in the temperature range from 15 degrees to 500 degreesC. With an increase in temperature the unit-cell parameters a, b, and c increased, while the b/a ratio decreased and became unity between 200 degrees and 400 degreesC. No significant changes were observed for atomic coordinates throughout the temperature studied. These results strongly suggest that the phase transition is induced by lattice distortion.

引用

页码：468 / 470

页数：3

共 10 条

[1] X-RAY STUDY OF DEFICIENT PEROVSKITE LA2-3TIO3 [J].

ABE, M ;

UCHINO, K .

MATERIALS RESEARCH BULLETIN, 1974, 9 (02) :147-155

[2]

Izumi F., 1993, RIETVELD METHOD, P236, DOI 10.1002/crat.2170300412

[3] ELECTRONIC TRANSPORT PHENOMENA OF LA2/3+XTIO3-DELTA (X-LESS-THAN-0.2) - METAL-NONMETAL TRANSITION BY ELECTRON DOPING [J].

KIM, IS ;

NAKAMURA, T ;

INAGUMA, Y ;

ITOH, M .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 113 (02) :281-288

[4] Infrared dielectric response of the La2/3TiO3-LaAlO3 microwave ceramics system [J].

Petzelt, J ;

Buixaderas, E ;

Komandin, G ;

Pronin, AV ;

Valant, M ;

Suvorov, D .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1998, 57 (01) :40-45

[5] X-RAY-DIFFRACTION AND MICROSTRUCTURAL INVESTIGATION OF THE AL2O3-LA2O3-TIO2 SYSTEM [J].

SKAPIN, S ;

KOLAR, D ;

SUVOROV, D .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1993, 76 (09) :2359-2362

[6] Synthesis and structure of new perovskite phase in the La-Ti-Al-O system [J].

Slater, PR ;

Irvine, JTS .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 146 (02) :437-438

[7] High-temperature X-ray diffraction study of the lanthanum aluminium titanate perovskite La0.683Ti0.95Al0.05O3 [J].

Yashima, M ;

Ali, R ;

Yoshioka, H .

SOLID STATE IONICS, 2000, 128 (1-4) :105-110

[8] Oxide ion conduction in A-site deficient La-Ti-Al-O perovskite [J].

Yoshioka, H ;

Kikkawa, S .

JOURNAL OF MATERIALS CHEMISTRY, 1998, 8 (08) :1821-1826

[9] UNUSUAL DIELECTRIC BEHAVIOR OF LA-TI-AL-O CERAMICS WITH PEROVSKITE STRUCTURE [J].

YOSHIOKA, H .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1994, 33 (7A) :L945-L948

[10] SUGGESTED GUIDELINES FOR THE PUBLICATION OF RIETVELD ANALYSES AND PATTERN DECOMPOSITION STUDIES [J].

YOUNG, RA ;

PRINCE, E ;

SPARKS, RA .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1982, 15 (JUN) :357-359

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