Aggregate and necking force in Mn-Zn ferrite

An experimental technique is proposed for evaluating the strength of aggregates during powder compaction. The technique is based on the interpretation of compaction pressure vs. green density. A Rumpf's equation was correlated with the equation suggested by Duckworth. Neck strength between primary particles, H=(sigma(0)pia(2)e(-Bp))/((1-p)K) in manganese zinc ferrite aggregate is thought to be 4.05 x 10(-5) N, with reference value of sigma(0). Manganese zinc ferrite decomposed from the precipitates of alcoholic dehydration was fractured at 300 MPa of the compaction pressure. From this, H was calculated as 5.03 X 10(-5) N. (C) 2002 Elsevier Science B.V. All rights reserved.