Magnetic properties of ball-milled SrFe12O19 particles consolidated by Spark-Plasma Sintering.

Abstract:

:The room-temperature magnetic properties of ball-milled strontium hexaferrite particles consolidated by spark-plasma sintering are strongly influenced by the milling time. Scanning electron microscopy revealed the ball-milled SrFe12O19 particles to have sizes varying over several hundred nanometers. X-Ray powder-diffraction studies performed on the ball-milled particles before sintering clearly demonstrate the occurrence of a pronounced amorphization process. During sintering at 950 °C, re-crystallization takes place, even for short sintering times of only 2 minutes and transformation of the amorphous phase into a secondary phase is unavoidable. The concentration of this secondary phase increases with increasing ball-milling time. The remanence and maximum magnetization values at 1T are weakly influenced, while the coercivity drops dramatically from 2340 Oe to 1100 Oe for the consolidated sample containing the largest amount of secondary phase.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Stingaciu M,Topole M,McGuiness P,Christensen M

doi

10.1038/srep14112

subject

Has Abstract

pub_date

2015-09-15 00:00:00

pages

14112

issn

2045-2322

pii

srep14112

journal_volume

5

pub_type

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