(MULTIFOX)

Material design, preparation, properties and modeling of multifunctional oxides structures for microelectronics and new energy storage applications


Abstract | Objectives | Research Team | Acquisitions | Results

2011 - Objectives

Objectives

Activities

OI. Study of new ferroelectric-based tunable ceramics:

OI.1 Dense nanostructured BaTiO3 ceramics:

I.0 Dissemination, coordination & management;

I.1.1 Synthesis & processing of nanopowders and nanostructured BaTiO3 ceramics;

I.1.2 Micro/nanostructural and phase analysis;

I.1.3 Broadband dielectric characterization, including MW range;

I.1.4 Ferroelectric & tunability properties.

I.1.5 Modeling (Monte Carlo, effective field, Preisach) to describe size effects on the dielectric, ferroelectric and non-linear properties.

I.1.6 Develop analitical models for resonant modes in BaTiO3 in MW range.



2012 - Objectives

Objectives

Activities

OI. Study of new ferroelectric-based tunable ceramics:

OI.1 Dense nanostructured BaTiO3 ceramics:

I.1.3 Broadband dielectric characterization, including MW range;

I.1.4 Ferroelectric & tunability properties.

I.1.5 Modeling (Monte Carlo, effective field, Preisach) to describe size effects on the dielectric, ferroelectric and non-linear properties.

I.1.6 Develop analitical models for resonant modes in BaTiO3 in MW range.

OI.2 BaTiO3-based solid solutions with ferroelectric-relaxor crossover:

I.2.1 Preparation of BaMxTi1-xO3, x=Sn, Ce by solid state;

I.2.2 Micro/nanostructural & phase characterization;

I.2.3 Study of temperature-dependent low field dielectric properties at low and MW frequencies by impedance spectroscopy;

I.2.4 Ferroelectric (P(E), FORC) and dc-tunability properties;

I.2.5 Multiscale models (Monte Carlo, Preisach-FORC) to describe the composition-induced ferroelectric-relaxor crossover.

2013 - Objectives

Objectives

Activities

OII. Single phase and composite multiferroics:

OII.1 Multiferroics with lone-pair ferroelectricity:

II.0 Dissemination, coordination & management.

II.1.1 Synthesis and processing of single phase BiFeO3 nanopowders with various morphologies by hydrothermal processing.

II.1.2 Synthesis and processing of Bi2Fe4O9 nanopowders with various morphologies by hydrothermal method.

II.1.3 Optimisation of sintering parameters to result in single-phase ceramics; micro/nanostructural & phase characterization.

II.1.4 Impedance spectroscopy at various frequencies and temperatures, conductivity analysis by comparison with solid-state ceramics.

II.1.5 High-field non-linear properties (ferroelectric, tunability) by comparison with solid-state ceramics.

II.1.6 Magnetic, thermomagnetic (SQUID, AGM) and magnetoelectric comparative investigations.

OII. Single phase and composite multiferroics:

OII.2 Ferroelectric-magnetic compounds derived from the BaO-Fe2O3-TiO2 ternary system.

II.2.1 Synthesis and processing of single phase self-assembled compound Ba12Fe28Ti 15O84 by solid state and by coprecipitation; comparative micro/nanostructural and phase characterization (XRD, SEM, HRTEM, PFM-MFM, Raman).

 

Objectives 2014

Objectives

Activities

1. Ferroelectric-magnetic compounds derived from the BaO-Fe2O3-TiO2 ternary system.

1.1 Comparative impedance spectroscopy and conductivity mechanisms analysis at various temperatures.

1.2 Magnetic, termomagnetic (SQUID, AGM) and magnetoelectric investigations.

1.3 Develop models to describe the dielectric and magnetic properties of the layered structure of self-assembled Ba 12Fe28Ti15O84 material.

2. New oxide ceramics for supercapacitors and energy storage.

2.1 Ceramic composites with giant permittivity formed by high/low conductivity oxides and by ferroelectric-carbon nanotube (CNT) combinations.

2.1.1 Preparation of ferro-antiferro composite ceramics and ferroelectric-CNT with various phase interconnectivity; micro/nanostructural/phase characterization.

2.1.2 Low-field impedance spectroscopy characterization.

2.1.3 High-field testing.

2.1.4 Models of composites based on realistic microstructures and study of percolation limits for various simulated microstructures.


Objectives 2015

Objectives

Activities

2. New oxide ceramics for supercapacitors and energy storage.

2.2 La-Pb(Zr,Ti)O3 ceramics with ferro-antiferro crossover prepared by solid state reactions

2.2.0 Dissemination, coordination & management.

2.2.1 Preparation of (Pb1-xLax)(Zr0.90Ti0.10)1-x/4O3 (PLZTx/90/10), x=2¸4 ceramics by solid state.

2.2.2 Micro/nanostructural/phase characterization.

2.2.3 Models for the ferro-antiferro transition (I).


Objectives 2016

Objectives

Activities

2. New oxide ceramics for supercapacitors and energy storage.

2.2 La-Pb(Zr,Ti)O3 ceramics with ferro-antiferro crossover prepared by solid state reactions

2.2.0 Dissemination, coordination & management (nonlinear properties and charge storage capability).

2.2.1 Broadband dielectric spectroscopy (including MW range) at low field and in a large temperature range.

2.2.2 Complex ferroelectric (P(E), FORC) and tunability characterization to monitor the ferro-antiferro transition.

2.2.3 Models for the ferro-antiferro transition. (II)



MODx - Mollio