Jump to main content
Jump to site search

Issue 4, 2014
Previous Article Next Article

From core–shell BaTiO3@MgO to nanostructured low dielectric loss ceramics by spark plasma sintering

Author affiliations

Abstract

We report a quite general way to design materials with tailored properties by combining thermolysis and fast sintering approaches. Submicrometric-sized BaTiO3 particles have been directly coated in a continuous nanocrystalline MgO shell through a thermal decomposition process. The electron microscopy study has evidenced a shell composed of randomly oriented MgO nanocrystallites. The final nanostructured composite, made of sub-micrometric MgO and BaTiO3 grains uniformly distributed, is obtained in situ during the SPS process. Such a rearrangement can be explained by the initial core–shell architecture, the weak cohesion of the MgO nanocrystallites and their soft plastic behavior under SPS conditions. The composite effect leads to significant modifications in both the dielectric properties and Curie–Weiss parameters compared to uncoated BaTiO3, especially a decrease and thermal stabilization of both the permittivity and the dielectric losses. We ascribe such changes to the stress generated during SPS through the extended interfaces between the two components.

Graphical abstract: From core–shell BaTiO3@MgO to nanostructured low dielectric loss ceramics by spark plasma sintering

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Oct 2013, accepted on 12 Nov 2013 and first published on 12 Nov 2013


Article type: Paper
DOI: 10.1039/C3TC31990C
Citation: J. Mater. Chem. C, 2014,2, 683-690
  •   Request permissions

    From core–shell BaTiO3@MgO to nanostructured low dielectric loss ceramics by spark plasma sintering

    R. Berthelot, B. Basly, S. Buffière, J. Majimel, G. Chevallier, A. Weibel, A. Veillère, L. Etienne, U. Chung, G. Goglio, M. Maglione, C. Estournès, S. Mornet and C. Elissalde, J. Mater. Chem. C, 2014, 2, 683
    DOI: 10.1039/C3TC31990C

Search articles by author

Spotlight

Advertisements