Directional solidification and interface structure of BaTiO3-CoFe2O4 eutectic

The directional solidification and the interface structure of BaTiO3-CoFe2O4 eutectic grown by the floating zone melting method were investigated. The microstructure of the eutectic were found to consist grains of lamellar or fibrous morphology. Two types of crystal structures of BaTiO3 were observe...

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Veröffentlicht in:	Journal of materials science 2000-11, Vol.35 (22), p.5587-5591
Hauptverfasser:	ECHIGOYA, J, HAYASHI, S, OBI, Y
Format:	Artikel
Sprache:	eng
Schlagworte:	Barium titanates Cobalt ferrites Cross-disciplinary physics: materials science rheology Crystal structure Crystals Directional solidification Dislocations Eutectics Exact sciences and technology Floating structures Growth from melts zone melting and refining Lamellar structure Materials science Methods of crystal growth physics of crystal growth Misfit dislocations Morphology Orientation relationships Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Solidification Zone melting
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Zusammenfassung:	The directional solidification and the interface structure of BaTiO3-CoFe2O4 eutectic grown by the floating zone melting method were investigated. The microstructure of the eutectic were found to consist grains of lamellar or fibrous morphology. Two types of crystal structures of BaTiO3 were observed for different growth conditions. The orientation relationships between BaTiO3 and CoFe2O4 (the spinel-type crystal structure) are a) hcp BaTiO3: (111) CoFe2O4 // (001) BaTiO3 and (110) CoFe2O4 // (110) BaTiO3, and b) tetra/cubic BaTiO3: (001) CoFe2O4 // (001) BaTiO3 and (100) CoFe2O4 // (100) BaTiO3. The interface has misfit dislocations due to the accommodation of lattice mismatch.
ISSN:	0022-2461 1573-4803
DOI:	10.1023/a:1004857014209