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A novel combustion synthesis of spinel ferrites, orthoferrites and garnets
Author(s) -
Suresh K.,
Kumar N. R. S.,
Patil K. C.
Publication year - 1991
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19910030306
Subject(s) - materials science , spinel , oxalic acid , ferrite (magnet) , combustion , redox , thermal decomposition , transformer , orthoferrite , thermal , inorganic chemistry , chemical engineering , metallurgy , composite material , organic chemistry , thermodynamics , magnetization , electrical engineering , chemistry , physics , quantum mechanics , voltage , magnetic field , engineering
Communication: Transformer cores and read‐write heads are two applications of micronsized ferrite powders. The powders (see figure) can be synthesized by the thermal decomposition of precursors in a solid solution, where, generally, atmospheric oxygen can be thought of as the oxidant. However, due to the low yields (∼15%) of these processes an alternative has been developed based on the exothermicity of the redox reaction between metal nitrates (oxidants) and tetraformal trisazine or oxalic acid dihydrazide (fuels).