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Preparation and Thermal Analysis of Mixed Magnesium‐Manganese‐Iron Oxalates and Hydrated Oxides
Author(s) -
GALLAGHER P. K.,
SCHREY FRANK
Publication year - 1964
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1964.tb14431.x
Subject(s) - manganese , stoichiometry , inorganic chemistry , magnesium , chemistry , divalent , pyrolysis , particle size , thermal analysis , oxalate , coprecipitation , nuclear chemistry , thermal , organic chemistry , physics , meteorology
A square‐loop ferrite composition, Mg 0.675 Mn 0.535 –Fe 1.8000 O 4 , having high purity and fine particle size was prepared by pyrolysis of coprecipitated oxalates or hydrated oxides. The control of pH had a marked effect on the stoichiometry of the coprecipitated divalent oxalates, and ap optimum pH of 2.5 to 3.0 was observed. Thermal analysis was performed on the coprecipitated materials and on individual components; it revealed that the coprecipitated oxalates formed a solid solution whereas the hydrated oxides did not.