Magnetoplumbite-related oxides

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Annual Review of Materials Science; (United States)

DOI:https://doi.org/10.1146/annurev.ms.20.080190.000411· OSTI ID:5471109

Collongues, R; Gourier, D; Kahn-Harari, A; Lejus, A M; Thery, J; Vivien, D ^[1]

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1. Lab. de Chimie Appliquee de l'Etat Solide, Ecole National Superieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75005 Paris (FR)

These ferrites were prepared from Fe{sub 2}O{sub 3}, MO oxides (M = Ba,Sr,Pb) and MeO oxides (Me = Mg,Mn,Co,Zn). Chemical compositions of the main barium ferrites (M = Ba) are represented in a ternary diagram. The structures of these various compounds (M,Y,W,Z,X,U) are closely related. The simplest one is the compound BaFe{sub 12}O{sub 19} (M). Its crystal structure is similar to that of the mineral magnetoplumbite PbFe{sub 7.5}Mn{sub 3.5}Al{sub 0.5}O{sub 19} (PbM{sub 12}O{sub 19}) (5). For this reason the hexagonal ferrites are also known as magnetoplumbite-type ferrites (called MP-type in this paper). When the Fe{sup 3+} ions are replaced by other trivalent ions, such as Al{sup 3+}, Ga{sup 3+}, another group of MP-type oxides, namely AB{sub 12}O{sub 19} (A = Ba{sup 2+} or a large divalent ion; B = Al{sup 3+} or Ga{sup 3+}) is obtained. In this paper, the authors briefly review ideal structure and major properties and uses, especially in the case of ferrites.

• OSTI ID: 5471109
• Journal Information: Annual Review of Materials Science; (United States), Journal Name: Annual Review of Materials Science; (United States) Vol. 20; ISSN 0084-6600; ISSN ARMSC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALUMINATES
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CRYSTAL STRUCTURE
FERRIMAGNETIC MATERIALS
FERRITES
IRON COMPOUNDS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LASER MATERIALS
LUMINESCENCE
MAGNETIC MATERIALS
MATERIALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS