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

Journal Article · · Nanoscale Advances
DOI: https://doi.org/10.1039/c9na00222g · OSTI ID:1532425

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.

Research Organization:
San Diego State Univ., CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); German Research Foundation (DFG); USDOE
Grant/Contract Number:
SC0008581
OSTI ID:
1532425
Alternate ID(s):
OSTI ID: 1904499
Journal Information:
Nanoscale Advances, Vol. 1, Issue 8; ISSN 2516-0230
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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