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Influence of Milled Powder Particle Size Distribution on the Microstructure and Electrical Properties of Sintered Mn‐Zn Ferrites
Author(s) -
CHOL GÉRARD R.
Publication year - 1971
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.1151-2916.1971.tb12163.x
Subject(s) - sintering , materials science , microstructure , particle size distribution , particle size , grain size , metallurgy , grain growth , calcination , particle (ecology) , chemical engineering , catalysis , biochemistry , chemistry , oceanography , engineering , geology
The grain growth and densification rates of Mn‐Zn ferrites during sintering are closely linked to the characteristics of the calcined and milled powders used. Long milling times enlarge powder particle size distributions and tend to promote discontinuous grain growth during sintering. For fixed sintering conditions, an optimum milling time, which corresponds to minimal eddy current and hysteresis losses, exists. The electrical properties of overmilled powders deteriorate greatly because duplex structure occurs. Theoretical analysis of the probability of discontinuous grain growth occurring during sintering in relation to powder particle size distribution agrees with the experimental results.