Exaggerated growth of hexagonal barium titanate under reducing sintering conditions

被引：44

作者：

Recnik, A

Kolar, D

机构：

[1] Department of Ceramics, J. Stefan Institute, University of Ljubljana, Ljubljana

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1996年 / 79卷 / 04期

关键词：

D O I：

10.1111/j.1151-2916.1996.tb08541.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 influence of reducing sintering conditions on anisotropic grain growth in BaTiO3 was studied above the BaTiO3-Ba6Ti17O40 eutectic temperature. The morphology and structure of exaggeratedly grown grains was examined by X-ray powder diffractometry, scanning electron microscopy, and high-resolution transmission electron microscopy. The results show that all anomalously grown anisotropic grains were hexagonal BaTiO3 in the form of platelike crystals with a/c ratios up to 10, The direction of preferential growth of hexagonal grains is crystallographically analogous with that of parallel (111) twins in a cubic phase, Ti3+ ions, induced by reducing atmosphere, play an important role in the formation of hexagonal stacking.

引用

页码：1015 / 1018

页数：4

共 11 条

[1]

Bast U, 1984, SILICATES IND, V9, P191

[2] THE CRYSTAL STRUCTURE OF HEXAGONAL BARIUM TITANATE [J].

BURBANK, RD ;

EVANS, HT .

ACTA CRYSTALLOGRAPHICA, 1948, 1 (1-6) :330-&

[3] POINT, LINEAR AND EXTENDED DEFECT STRUCTURES IN NONSTOICHIOMETRIC RUTILE [J].

BURSILL, LA ;

BLANCHIN, MG ;

MEBAREK, A ;

SMITH, DJ .

RADIATION EFFECTS AND DEFECTS IN SOLIDS, 1983, 74 (1-4) :253-265

[4] AN INVESTIGATION OF THE CUBIC-HEXAGONAL TRANSITION IN BARIUM TITANATE [J].

GLAISTER, RM ;

KAY, HF .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1960, 76 (491) :763-771

[5]

JUGLE DB, 1966, THESIS RENSSELEAR PO

[6] PHASE-RELATIONS IN THE BARIUM TITANATE-TITANIUM OXIDE SYSTEM [J].

KIRBY, KW ;

WECHSLER, BA .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (08) :1841-1847

[7] STRUCTURAL AND SPECTROSCOPIC INVESTIGATION OF (111) TWINS IN BARIUM-TITANATE [J].

RECNIK, A ;

BRULEY, J ;

MADER, W ;

KOLAR, D ;

RUHLE, M .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1994, 70 (05) :1021-1034

[8]

RECNIK A, 1993, P MULT C EL MICR U P, P283

[9]

Schmelz H., 1982, CFI - Ceramic Forum International - Berichte der Deutschen Keramischen Gesellschaft, V59, P436

[10]

Schmelz H., 1984, Ceram. Forum Int., V61, P199

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