Iron oxide-based nanostructured ceramics with tailored magnetic and mechanical properties: development of mechanically robust, bulk superparamagnetic materials - Archive ouverte HAL Access content directly
Journal Articles Nanoscale Advances Year : 2019

Iron oxide-based nanostructured ceramics with tailored magnetic and mechanical properties: development of mechanically robust, bulk superparamagnetic materials

Abstract

Nanostructured iron-oxide based materials with tailored mechanical and magnetic behavior are produced in bulk form. By applying ultra-fast heating routines via spark plasma sintering (SPS) to supercrystalline pellets, materials with an enhanced combination of elastic modulus, hardness and saturation magnetization are achieved. Supercrystallinity – namely the arrangement of the constituent nanoparticles into periodic structures – is achieved through self-assembly of the organically-functionalized iron oxide nanoparticles. The optimization of the following SPS regime allows the control of organics' removal, necking, iron oxide phase transformations and nano-grain size retention, and thus the fine-tuning of both mechanical properties and magnetic response, up until the production of bulk mm-size superparamagnetic materials.
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Dates and versions

hal-02318541 , version 1 (18-01-2024)

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Diletta Giuntini, Elisa Torresani, Kyle Chan, Malte Blankenburg, Lucien Saviot, et al.. Iron oxide-based nanostructured ceramics with tailored magnetic and mechanical properties: development of mechanically robust, bulk superparamagnetic materials. Nanoscale Advances, 2019, 1 (8), pp.3139-3150. ⟨10.1039/C9NA00222G⟩. ⟨hal-02318541⟩
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