BrainMap

Mioara Zagrai

Environmental Engineering

Scientific Researcher III - INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Researcher

Web of Science ResearcherID: https://publons.com/researcher/3186349/zagrai-mioara/

Curriculum Vitae (29/01/2024)

Expertise & keywords

Advanced Glasses and Glass-Ceramics Waste forms for Efficient Radionuclides Incorporation Call name: P 1 - SP 1.1 - Proiecte de cercetare Postdoctorală - PD-2021
PN-III-P1-1.1-PD-2021-0721 2022 - 2024

Role in this project: Project coordinator

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: https://www.itim-cj.ro/PNCDI/agcform/

Abstract:

Radioactive materials are utilized for society’s benefit in science, medicine, industry, and defense for more than a century. However, safe and stable storage of radioactive waste generated from the nuclear reactors is still a major worldwide environmental issue. During the past two decades, a substantial research has been devoted to developing, characterizing, and evaluating the performances of a high number of host matrix materials for stabilization and immobilization of fission products and actinide wastes. Conversion of these wastes to a stable solid form which will neither react nor degrade for extended periods of time is mandatory action to protect humankind and the environment from ionizing radiation. In this respect, the scientific motivation of the propose project is to obtain a glass composition which can meet the requirements of immobilization of radioactive waste: chemical resistance and stability similar to borosilicate glasses, and low processing temperature, such as phosphate. The aim of the present project proposal is to develop suitable wasteforms composition for efficient radionuclides immobilization. The methods proposed for the investigations are complementary and provide a complex structural and behavioral image of the new materials.

The optimization of recycled lead for the applications on the automobile battery Call name: P 3 - SP 3.1 - Proiecte de mobilități, România-China (bilaterale)
PN-III-P3-3.1-PM-RO-CN-2018-0183 2018 - 2019

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); Institute of High Energy Physics Chinese Academy of Science, P. R. China (CN)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.itim-cj.ro/bilateral/bm13/

Abstract:

The lead acid battery is a ”living” and the most successful electrochemical power source of all times. After consumption, the recycling of lead is important for the environment, but also for saving natural resources, in accordance with EU Directive 2006. The need for the built a ”society of recycling batteries” using environmentally friendly, low cost and low energy consumption methods remains a problem of the modern world. One of the highly aimed goals of electrochemist consists in the valorification of recycled materials in the environment from which they came from – like new electrodes for renewable batteries.

The aim of this project consists in the efficient optimizating of recycled lead from anodic and cathodic plates of a spent car battery by the incorporation of another oxides using a eco-innovative, low cost and low energy consumption method. The new structural features of the recycled lead will improve renewable battery performances due to the substantially reducing passivation on the surface of the anodic electrode. The most important factor is consists in the manufacturing of new electrodes using PN-III-CEI-BIM-CN recycled materials and the reframing of new product in the environment from which they came from - like optimized electrodes for renewable batteries.

The investigation by modern methods of a structure-luminescence properties interrelationship in the vitreous systems based on lead and doped with europium ions”, Call name:
PN-III-P1-1.1-MC-2017-2180 2017 - 2018

Role in this project: Project coordinator

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M ()

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M ()

Project website: https://www.itim-cj.ro/pncdi/ru707/

Abstract:

Materialele care încorporează ioni de pământ rar, precum ionul de europiu, sunt de mare importanţă pentru comunitatea ştiinţifică şi pentru aplicaţii fotonice incluzând tuburi fluorescente eficiente, diode cu emisie de lumină (LED-uri albe pe bază de fosfor), televizoare color (de culoare roşie şi albastră), monitoare, dispozitive optice, materiale laser etc. Sticlele pe bază de PbO2-Pb ca matrice gazdă pentru astfel de aplicaţii au ca avantaj încorporarea unei cantităţi mari de ioni de pământ rar la o temperatură joasă. În acest proiect se va realiza o analiză comparativă a structurii şi proprietăţilor luminescente pentru două sisteme vitroase pe bază de PbO2-Pb, unul dopat numai cu Eu2O3 şi celălalt dopat atât cu Eu2O3 cât şi cu Gd2O3 în diferite concentrații. Probele vor fi caracterizate cu tehnici avansate de investigare pe bază de radiație sincrotronică. Compararea rezultatelor din diferite tehnici de investigare va permite studierea în detaliu a microstructurii sticlelor și vitroceramicilor, identificarea numărului de coordinare al plumbului, al mediului de coordinare al ionilor de pămînt rar și vor putea fi descrise mecanismele care stau la baza fenomenului de luminescență.

The expertise of metallic oxides partial stabilized zirconia for applications in the stomatologic domain Call name: P 2 - SP 2.1 - Transfer de cunoaștere la agentul economic „Bridge Grant”
PN-III-P2-2.1-BG-2016-0077 2016 - 2018

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); ZIRCON DENT SRL (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: http://www.itim-cj.ro/ziroxstoma/index.htm

Abstract:

Increased demand for esthetics in stomatology domain has led to an increase in the use of CAD/CAM high-strength but expensive ceramics. Among the ceramics used in these new systems, zirconia was the main focus of research because it offers a range of properties that make it suitable for use in dentistry: biocompability, high fracture resistance, low thermal conductivity, resistance to corrosion and a totally crystalline microstructure. An inherent problem of the material is a phenomenon known as spontaneous aging, hydrothermal degradation or low temperature degradation. These factors change its crystalline phase from tetragonal to monoclinic, which increases the volume (4% to 5%) of the crystals causing the loss of their mechanical properties and the appearance of micro- and macro-cracks. By adding small percentages of yttria (3-5% Y2O3), these phases changes are eliminated, and the resulting material has superior thermal, mechanical, and electrical properties.

In brief, the research of upgraded or new biomaterials is related to the crucial topic of the enhancement of the life conditions with respect to the cost of healt care.

Our proposal refers to high-performance metallic oxides – stabilized zirconia material that combine the excellent structural properties of dopants in terms of chemical stability, biocompatibility and extremely low wear and of zirconia with its superior mechanical strength and fracture toughness.The effective dopants of the proposed materials for this study include MgO, CaO, Al2O3, HfO2, SiO2, Y2O3, TiO2, Fe2O3. High sensitivity techniques are used for structural investigations.

The final goal of the proposed project is: i. To develop solutions for a better stabilization of zirconia by adding of performanted metallic oxides. ii. To develop complex research on the structure-property interlations and on the characterization of the effects about the colour modifications, iii. To integrate advanced biomaterials in the stomatologic domain.

A novel approach for obtaining lead based electrodes used in automotive batteries Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-1069 2017 - 2018

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.itim-cj.ro/pncdi/ntrodes/

Abstract:

Abstract: Batteries are essential in modern society as an excellent source of mobile energy. Almost 95% of the materials in a lead-acid battery are recyclable. Since the positive electrode and negative electrode active materials are composed of PbO2/PbSO4 and Pb/PbSO4, lead is the most important raw material of lead acid batteries. UE Directives have as aim higher rate of recycling and improvement of the batteries performance. The problems concerning the lead recycling from spent car batteries can be summarized as follows: i) the reduction of pollutions and energy consumption, ii) the reduction of energy and time used to convert oxides and sulfates into metal which is subsequently reconverted to oxides, iii) ineffective desulphurization, iv) low solubility of lead compounds in solvents. The specific topic is based on a new approach regarding Recycling of Electrodes of the Car Batteries as new sources of alternative energies. The author recently developed electrode glasses based on Pb-PbO2 and Pb-PbO2-PbSO4. In this sense, efforts will be made to create the complex packaging: i) to recycle electrodes of the car batteries by an eco-innovative technology and ii) to integrate recycled products as electrodes in the construction of new rechargeable batteries. Performances expected will consist of: 1) synthesize of materials; 2) optimize of performances; (3) fabricate batteries; (4) compare the batteries performance (5) report results in peer-reviewed journal.

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects