OXYDES

Functional oxides for energy efficiency : nanostructuration and combinatorial synthesis

Oxides are easy to produce, low cost, health- and environment-friendly while being stable in a large range of temperatures. They have a variety of magnetic, mechanical and electrical properties which make them essential materials in many fields related to energy efficiency. These properties, often resulting from multiple competitive interactions, vary rapidly according to their composition and dimensionality (crystals, thin films, massive ceramics, nanopowders, nanowires...) They also depend on the intrinsic interfaces of materials (grain boundaries...) or artificial interfaces (composite materials, multilayers). In addition, functionality and performance depend on the micro and / or the nanostructure (porosity, exchange surface and stress response).
GREMAN has adopted a multi-scale material approach that explores their fundamental properties and puts forward practical applications.

OXYDES team focuses on three research operations :

Physical properties of oxides are strongly dependent of their combined composition and microstructure (intrinsic or artificially modified). Elaborating new material architecture and nanostructuration enables researchers to develop novel power capacitors and materials with innovative thermoelectric or piezoelectric properties...
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Ferroelectric and piezoelectric materials are key components of energy and information storage or conversion devices. New RoHS/REACH norms encourages researchers to find alternatives to lead-based components, largely used today in a large variety of applications. Using a wide technique range of techniques and following different routes, the team aims objectives are to synthesize and characterize new multiscale lead-free materials, in order to integrate them in new transducers and sensors.
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Environmental issues and energy challenges imply an efficient and sustainable management of energy conversion and storage. Discovering new, well characterized material enables the team to develop more efficient components: ultra-capacitors, microbatteries thermoelectrics
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MAtériaux Piézoélectriques Sans plomb
Region Centre Val de Loire 2025-2028
Coordinator: University of Tours
Partners: CEMTHI, Vermon

First Regenerative sOlid-STate Barocaloric refrIgeraTor
Europe 2024-2028
Coordinator: University of Bordeaux
Partners: University of Tours, University of Lorraine, Univerza v LjubljaniI, Universitat Politecnica de Catalunya, University of Kent, TotalEnergies OneTech

Etude de l’influence de la texturation sur les propriétés fonctionnelles des céramiques piézoélectriques sans plomb
Thalès TDMS 2024-2027
Coordinator: University of Tours
Partners: Thales TDMS et Thales TRT (Palaiseau)

Ferroic Materials for Dynamic Heat Flow Control
ERC 2023-2027
Coordinator: CNRS

Matériaux déposés par copulvé
Région Centre Val de Loire, ARD Certem 5.0 2021-2025
Coordinator: University of Tours
Partners: ST Microelectronics via ARD Certem

Elaboration et caractérisation haut débit d'hétérostructures pour des applications microélectroniques
PEPR DIADEM
Coordinator: University of Tours
Partners: CEA-SPEC (Saclay), CEA-LETI (Grenoble), ISCR (Rennes)

optimisation des matériaux pour augmenter les performances des cellules électrochimiques pour la production d’HYdrogène à haute TEMPErature
2021-2025
Coordinator: University of Tours
Partners: CEA- Le Ripault, GENVIA

Etude THERmoélectrique de nouveaux Matériaux Organiques
APR 2020-2024
Coordinator: University of Tours
Partners: PCM2E, GREMI, GREMAN, Ikamba

Optimisation de l'interface éléments actifs/collecteur en alliage d'aluminium pour dispositif de stockage de l'énergie
ARD Matex 2021-2025
Coordinator: University of Tours
Partners: PCM2E, CETIM (Bourges et Saint-Etienne)

Lubrification éléctrochimique des aciers inoxydables
Contrat Université 2021-2025
Coordinator: University of Tours
Partners: CETIM (Senlis)

Metal nanoparticle ink synthesis and Inkjet printing of nanoparticle seed layers on solar cells
PHC Ulysses 2023-2025
Coordinator: University of Tours
Partners: Dublin City University (Irlande)

Study and sintering of MOLecular compounds for BAROcaloric reFRIGEration
ANR 2024-2028
Coordinator: University of Bordeaux
Partners: University of Tours, University of Lorraine

Optimisation de l'énergie dans des microsupercondensateurs
Region Centre Val de Loire - 2024-2028
Coordinator: University of Tours
Partners: CEMHTI, GREMI, Vitruvens, Mistic

Etude de la physique de nucléation de domaines ferroélectriques dans des couches minces submicroniques générées par la technologie SmartCut ™
Soitec 2023-2025
Coordinators:  University of Tours
Partners: Soitec

Sustainable Components for Underwater Acoustics using Lead-freematerials in Europe
european defense fundings (EDF) - 2022-2025
Coordinator: University of Tours
Partners: Thales TDMS (COO), Thales TRT, DTU, Fraunhofer (IKTS), Josef stefan inst., PI ceramics, Marion Tech. , IRES, Kongsberg, Atlas, LEONARDO, TNO, Optics11

Frittage en conditions extrêmes Développement et optimisation des propriétés de céramiques piézoélectriques sans plomb, frittées par Spark Plasma Sintering
Région CVL, ARD MATEX 2021-2025
Coordinator: University of Tours
Partners: Vermon, CEMHTI, ICMN

Remède aux couches polaires mortes et aux courants de fuites dans les varactors BST pour les télécommunications NFC et 5G
ANR 2023-206
Coordinator: University of Tours
Partners: CEA-SPEC (Saclay), CEMES (Toulouse), CRISMAT (Caen), Jaybeam Wireless (Amboise)

Matériaux diélectriques innovants à haute température pour le stockage de l’énergie électrique
APR 2021-2025
Coordinator: University of Tours
Partners: SRT-Microcéramique, ICMN(Orléans), SPMS (Paris-Saclay)

Thermoelectric n-type Polymers: design, processing and structure
ANR 2023-2026
Coordinator: CNRS
Partners: ICPEES, PCM2E, GREMAN, ICS

Revêtements à base de CrN déposés par pulvérisation magnétron réactive pour applications automobiles
ARD Matex 2021-2025
Coordinator: University of Orléans
Partners: GREMI, GREMAN, PHINIA

Deep Tech Manufacturing
Europe (EIT) 2023-2024
Coordinator: Dublin City University
Partners: University of Kragujevac (Serbia), University of Iaonina (Greece), University of Mondragon (Spain)