Abstract
1. It has been established that the spinel phase content of mass-produced Type 2000NM and 2000NMI manganese-zinc ferrite powders ranges from 60 to 90%. 2. It is shown that the phase composition of these powders may be used as a measure of the extent of their oxidation. In view of the rapidity and ease with which phase analysis can be performed in the URS-501 x-ray diffraction apparatus, phase composition control could become a standard industrial technique, and would undoubtedly help to obtain reproducible properties in manganese-zinc ferrite components. 3. It was found that the greatest amount of hematite is produced when the calcining of powders is performed in the temperature range 600–800°C. 4. An interrelationship was discovered between the hematite content of powders on the one hand and the technological characteristics of the latter and the susceptibility of parts to cracking during sintering on the other.
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