Project code PN-IV-P1-PCE-2023-1192
Financing contract no. 85PCE/1.07.2025
Title:
A new tool for designing bi-tunable materials: functionally graded ceramics from core-shell powders
acronym
BiTunFGC
Director:
Conf. Dr. habil. Lavinia-Petronela Curecheriu
Duration: 36 months
Abstract
Today, the challenge is to develop innovative materials that are economical and environmentally friendly for a wide application area. Among these innovative materials, a special class is that of functionally graded materials (FGMs). These are a special class of composites in which different materials are graded based on applications desired. FGMs have gained interest because their properties can be easily tailored due to the absence of well-defined boundaries between different regions which is common in conventional composite materials. The main challenges in processing and using these materials are (i) the fabrication of FGMs with the desired gradient; ii) the lack of design data for controlled FGMs microstructures. Considering the aim of the present project is to rational design of functionally graded ceramics (FGC) from core-shell structures with controlled dielectric dc-tunability, and/or bi-tunable (magnetic and dielectric) properties. This aim will be approached by understanding physical-chemical processes related to the interplay between ceramic densification and core-shell interdiffusion during sintering. The novelty consists of a fundamental theoretical-experimental study of critical parameters (size & shape) of core-shell starting powders as a new tool for controlling dielectric&magnetic tunability properties of BaTiO3 – based FGC. The project proposes for the first time the core-shell approach to fulfill FGCs requirements for tunability applications.
Budget
|
NR. |
Budget chapter |
Year 2025 |
Year 2026 |
Year 2027 |
Year 2028 |
TOTAL |
|
1. |
Personnel expenses |
100.000 |
200.000 |
200.000 |
78.799 |
578.799 |
|
2. |
Logistics expenses |
125.000 |
125.000 |
50.000 |
30.000 |
330.000 |
|
|
Out of which the value for the equipment expenses- |
75.000 |
75.000 |
50.000 |
0 |
200.000 |
|
3 |
Travel expenses |
30.000 |
30.000 |
30.000 |
25.000 |
115.000 |
|
4. |
Indirect expenses |
52.000 |
30.000 |
28.500 |
13.069 |
123.569 |
|
|
TOTAL |
307.000 |
385.000 |
308.500 |
146.868 |
1.147.368 |
Team
|
Conf.dr.habil. Lavinia-Petronela Curecheriu |
manager |
|
Lect.dr. Petronel Postolache |
|
|
CS III dr. George Stoian |
|
|
Post doc 1 |
vacant position |
|
Post doc 2 |
vacant position |
|
PhD 1 |
vacant position |
|
PhD 2 |
vacant position |
Objectives
Phase 1 (2025)
Understanding the role of critical parameters (composition, size and shape) of core-shell powders and the densification-interdiffusion interaction during sintering on the tunability properties of FGCs - experimental study of the tunability properties of BaTiO3-based FGCs obtained from core-shell powder.
Phase 2 (2026)
Understanding the role of critical parameters (composition, size and shape) of core-shell powders and the densification-interdiffusion interaction during sintering on the tunability properties of FGC. Modeling of tunability in BT-based FGC with different core characteristics. Obtaining compositional gradient magnetoelectric ceramics (FGC) - experimental study
Phase 3 (2027)
Finding relationships between the ferroelectric/magnetic ratio and the compositional gradient in FGCs; Designing optimal composites with controlled magnetic and dielectric properties
Phase 4 (2028)
Densification and characterization of BaTiO3-based FGC ceramics with different dimensions, shapes and phase connectivity; Complex electrical and magnetic characterization; Multiscale models for describing the functional properties of realistic microstructures with graded compositions