Texture and microstructural development in gelcast barium hexaferrite

• Published in: Journal of materials science Vol. 43; no. 6; pp. 1836 - 1843
• Main Authors: Hovis, D. B., Faber, K. T., Kenik, E. A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2008; Springer; Springer Nature B.V
• Subjects: ADDITIVES; Applied sciences; BARIUM CARBONATES; BARIUM COMPOUNDS; barium haxaferrite; Barium hexaferrite; BORON OXIDES; Building materials. Ceramics. Glasses; Ceramic industries; Characterization and Evaluation of Materials; Chemical industry and chemicals; Chemistry and Materials Science; Classical Mechanics; Coarsening; controlled grain growth; Crystallography and Scattering Methods; Electrotechnical and electronic ceramics; Exact sciences and technology; FERRITES; Gelcasting; GRAIN GROWTH; Magnetic fields; MATERIALS SCIENCE; MICROSTRUCTURE; orientation imaging microscopy; Polymer Sciences; SINTERING; Solid Mechanics; Surface layer; Technical ceramics; TEXTURE; Texture Direction; Barium Hexaferrite; B2O3; Orientation Image Microscopy; BaCO3; Scanning electron microscopy; Hexagonal ferrites; Grain growth; Experimental study; Texture; Barium Iron Oxides Mixed; Oxide ceramics; Template; Colloidal gel; Casting; Iron Oxides; Barium Oxides; Fabrication structure relation; Manufacturing; Microstructure; Electroceramics
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-007-2375-2

The development of texture in barium hexaferrite by templated grain growth was studied as a function of the Fe 2 O 3 /BaCO 3 ratio, B 2 O 3 additions in the starting materials, and sintering temperature. A magnetic field was used to orient the template particles during the gelcasting process. Excess BaCO 3 resulted in abnormal grain growth and maximized texture, while B 2 O 3 additions promoted coarsening, but no abnormal grain growth.