Funding: the state budget
Name of the Program from PN IV: Program 5.1 - Ideas
Project type: Exploratory Research Projects

Title:

Study of percolation effects and microstructural design through numerical modeling in metal-ferroelectroceramic metacomposites,

acronym

CERMETCOM

Project code PN-IV-P1-PCE-2023-0995
Financing contract no. 43PCE/08.01.2025

Director:
Prof. dr. Liliana Mitoseriu

Duration: 36 monts

Abstract:

The project is aimed to propose processing strategies for rational design of ferroelectric-based CerMets and to produce a selection of composite microstructures with: (i) superior electroactive properties (giant permittivity) in sub-percolative compositional range (insulating), or (ii) meta-composite characteristics e.g negative or zero permittivity in tunable frequency ranges (over-percolative conductive compositions). This objective will be realised by a multi-disciplinary theoretical-modelling & experimental multiscale approaches combining knowledge in solid state physics and chemistry of ceramics and metallic systems. The novel idea is to understand the physico-chemical processes related to the interplay between ceramic densification and metallic filler melting/infiltration/crystallisation during the sintering of CerMet composites in providing specific types of microstructures (filaments, connected or partially percolated phases). As result, strategies for controlling local composition and microstructural modulation by means of operative processing parameters will be proposed. As model systems, CerMets formed by Ag (or Ag alloys) fillers in BaTiO3 ferro/dielectric matrices are proposed, covering a wide range of compositions and types of microstructures. Selected compositions and specific microstructures are expected to provide giant permittivity and significant ferro/piezoelectric properties, or electromagnetic emergent properties, i.e. meta-composite characteristics.