Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 31, Issue 15, Pages 2943-2955Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2011.06.004
Keywords
Hot Isostatic Pressing; Spark Plasma Sintering; Spinels; Magnetic properties; Mechanical properties
Categories
Funding
- Region Ile-de-France
- C'Nano IdF
- CNRS
- CEA
- MESR
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In this work we describe a novel bottom-up strategy to process cobalt ferrite CoFe(2)O(4) nanostructured bulk material. This strategy offers the possibility to drive their magnetic and mechanical properties in a wide range of different behaviors. In particular, we show how to tune the blocking temperature along with optimized mechanical strength. This method combines forced hydrolysis in polyol, a soft chemistry route, and Spark Plasma Sintering (SPS) for consolidation. To highlight this method, we also performed compaction by a standard Hot Isostatic Pressing (HIP) process. Thus we compare the nanostructured bulk microstructures (for both compaction techniques) and magnetic static properties to those of several CoFe(2)O(4) nanopowder samples showing particle size and annealing temperatures comparable to those of the nanostructured bulk samples. Microstructure, radio-crystallographic and magnetic studies have been carried out in order to show the optimization of the processing strategy in this work. (C) 2011 Elsevier Ltd. All rights reserved.
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