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Update Data 
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cristina.ciomaga@uaic.ro |
| Last update: 13/02/2025 | |
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| Name: |
| Cristina-Elena |
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Surname: |
Ciomaga |
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Institution: |
Alexandru Ioan Cuza University of Iasi |
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Type of Institution: |
University |
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ORCID number: |
https://orcid.org/0000-0002-1287-7702
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Google Scholar: |
https://scholar.google.com/citations?user=uhT3HyIAAAAJ&hl=ro
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Country: |
Romania
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WEB address: |
Carol I, nr 11, Univ. Al. I. Cuza din Iasi, corp A |
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Working groups of interest |
| - | WG1 - Advances in Porous Materials and Technologies | | - | WG3 - Energy |
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| Keywords |
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Research field (Free keywords) |
ferroelectric, porous ferroelectric ceramics, magnetoelectric composites, oxide perovskites, dielectric properties |
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| Materials/technologies |
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Scientific expertise |
The main research topics to which I have made significant original contributions include:
I. Study of BaTiO3 (BT) solid solutions (Ba(Zr,Ti)O3 – BZT, (Ba,Sr)TiO3 – BST): preparation – characterization – properties – modeling: My work has contributed to understanding the effects of composition, grain size, and boundary-dependent phenomena on dielectric properties, structural phase transitions, and ferroelectric-relaxor crossover. The preparation and complex characterization of BZT ferroelectric-relaxor materials were realized in collaboration with the ICMATE-CNR Genoa, Italy group during research stages obtained by national and international competitions. TI has authored or co-authored 25 ISI papers with more than 450 citations and 1 national Grant type BD code 108 - the individual research grants for PhD Students.
II. Multiferroic composites with magnetoelectric coupling: experiment-modeling. : I have investigated percolation transitions, magnetoelectric coupling mechanisms, and designed composites for miniaturized microwave devices with tunable properties. This subject was exploited in a national project PNII-RU-TE 187/2010-IMECOMP, managed by PL. The results on this topic were materialized in 16 ISI papers with 400 citations and 2 national patents. PL also had 2 research fellowships funded by POSDRU/89/1.5/S/63663 and by COST IC1208 Action on this topic. Moreover, PL was the Work package leader on the synthesis and microscale characterization of ferroelectrics, ferromagnetics, and magnetoelectric composite in the PN-II-PT-PCCA-2013-4-1119 project with the title „Magnetoelectric composites with emergent properties for wireless and sensing applications”. The main contributions were the designing of magnetoelectric composites for miniaturized microwave devices with magnetic tunable and bi-tunable (by electric and magnetic fields) properties. Another contribution in this field was (v) to understand the effect of dopant ions (Mg, Mn) on the dielectric properties of oxide systems with spinel structures such as MgxNi1-xFe2O3 and NixMn1-xFe2O3 by using broadband impedance spectroscopy method, and the effect of synthesis on the structural and electrical properties for biomorphic tubular nickel oxide structures (3 ISI papers, 84 citations).
III. Preparation and study of electrical properties on Polymer-ferroelectric composites. Main contributions: (i) Preparation and investigation of the role of ferroelectric phase BT nanofillers or Ag addition on ferroelectric perovskite into polymer matrix on the structural, dielectric, and mechanical harvesting response; (ii) understanding the piezoelectric response depending on the filler oxides in the ferroelectric polymer matrix (6 ISI papers with 41 citations, and 1 national patent).
IV. Role of porosity in ceramic materials: My research demonstrated the influence of controlled porosity on dielectric, tunability, piezoelectric, and pyroelectric properties of materials such as BaTiO3 (BT), BaSrTiO3 (BST), (Ba,Ca)(Ti,Zr)O3 (BCTZ) and Nb-doped Pb(Zr,Ti)O3 (PZT). The main contributions are (i) the design and manufacturing of Pb-free piezoelectric ceramics with different porosity levels and microstructures; (ii) the demonstration of the beneficial role of introducing controlled porosity in ferroelectric ceramics to the dielectric, tunability, piezo-/pyroelectric; (iii) optimising the piezoelectric Figure of merit of ceramics with an optimum degree of porosity and composition at Morphotropic Phase Boundary in BCTZ; (iv) experimental validation of piezoelectric energy harvesting performances of porous Pb-free ceramics;(v) elaboration of a new concept for designing tunable composite materials (PZT with CNT) based on the local field inhomogeneity, in which the local field enhancement is promoted by the presence of 1D CNT structures; (vi) evidences of the role of phase interconnectivity on the dielectric properties in porous ceramics with specific microstructural characteristics induced by various pore-forming addition, from closed porosity (0–3) towards a combined (0–3, 2–2) with lamellar-type of microstructures and (vii) understanding the effects of post-sintering re-oxidation treatment on the dielectric relaxation, conductive and nonlinear properties of (Ba,Sr)TiO3 ceramics. This work has led to 14 ISI papers with 190 citations, a national project PN-III-P4-ID-PCE-2020-1988, and 1 proposal for a national patent.
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Capabilities |
Communication skills ▪ International and national experience: Developed through activities as a researcher in national and international laboratories, and as a teacher at the Faculty of Physics.
▪ Organization and coordination: Demonstrated organizational skills as a research project manager, coordinating teams that achieved "Excellent" ratings.
▪ Effective collaboration: Ability to establish and maintain productive collaborative relationships with diverse research teams nationally and internationally.
▪ Active participation: Active and constructive involvement in research projects, contributing to their success.
Job-related skills • Professional expertise: Scientific and technical expertise; Critical and analytical thinking; Mentoring and leadership skills; project manager skills; communication and collaboration skills.
• Laboratory skills: measurements in low, medium and high frequencies, structural and microstructural analyses; chemistry laboratories in preparing ceramic materials by the method of solid-state reaction and co-precipitation.
• Software skills: advanced use (Word, Excel, PowerPoint); Origin; XRD_X´Pert High Score, Vision software laboratory, etc.
• Academic and professional achievements: Publication of articles in Q1 and/or top1 journals, patents, research projects;
• Contributions to professional development: Attracting and creating research positions for researchers, and young graduates.
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Relevant publications
(6 max.) |
| Turcan, I., Curecheriu, L.-P., Stoian, G., Mihaila, I., Ciomaga, C.-E., Mitoseriu, L., Influence of sintering temperature on the electrical properties of SrTiO3–BaZrTiO3 ceramics for energy storage applications (2024) Ceramics International, 50 (12), pp. 21898-21908. DOI: 10.1016/j.ceramint.2024.03.303 |
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| Horchidan, N., Curecheriu, L.P., Lukacs, V.A., Stirbu, R.S., Tufescu, F.M., Dumitru, I., Stoian, G., Ciomaga, C.E., Porosity effect on the functional properties and energy harvesting performance of Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics (2024) Journal of the American Ceramic Society, 107 (5), pp. 3230-3242. DOI: 10.1111/jace.19622 |
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| Ciomaga, C.E., Horchidan, N., Padurariu, L., Stirbu, R.S., Tiron, V., Tufescu, F.M., Topala, I., Condurache, O., Botea, M., Pintilie, I., Pintilie, L., Rotaru, A., Caruntu, G., Mitoseriu, L., BaTiO3 nanocubes-Gelatin composites for piezoelectric harvesting: Modeling and experimental study (2022) Ceramics International, 48 (18), pp. 25880-25893. DOI: 10.1016/j.ceramint.2022.05.264 |
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| Ciomaga, C.E., Guzu, A., Airimioaei, M., Curecheriu, L.P., Lukacs, V.A., Avadanei, O.G., Stoian, G., Grigoras, M., Lupu, N., Asandulesa, M., Mitoseriu, L., Comparative study of magnetoelectric BaTiO3–Co0.8Zn0.2Fe2O4 bi-tunable ceramics sintered by Spark Plasma Sintering and classical method (2019) Ceramics International, 45 (18), pp. 24168-24175. DOI: 10.1016/j.ceramint.2019.08.125 |
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| Stanculescu, R., Ciomaga, C.E., Padurariu, L., Galizia, P., Horchidan, N., Capiani, C., Galassi, C., Mitoseriu, L., Study of the role of porosity on the functional properties of (Ba,Sr)TiO3 ceramics (2015) Journal of Alloys and Compounds, 643, pp. 79-87. DOI: 10.1016/j.jallcom.2015.03.252 |
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| Ciomaga, C.E., Neagu, A.M., Pop, M.V., Airimioaei, M., Tascu, S., Schileo, G., Galassi, C., Mitoseriu, L., Ferroelectric and dielectric properties of ferrite-ferroelectric ceramic composites (2013) Journal of Applied Physics, 113 (7), art. no. 074103. DOI: 10.1063/1.4792494 |
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Projects
(3 max.) |
| Project director PN-III-P4-ID-PCE-2020-1988, Engineering of lead-free porous ceramic materials for obtaining piezo-, pyroelectric sensors with energy harvesting applications (EnginPOR), |
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| Project director PN II-RU TE 187, Contract 35 / 5.08.2010, Investigation of the volume, interface, and percolation effects in multifunctional composite materials and metamaterials with controlled geometry |
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| Project director of Postdoctoral project POSDRU/89/1.5/S/63663, Study of nanocomposite ceramics with emerging electromagnetic properties - metamaterials. Scientific research and communication. Scientific popularization: negative refraction index and elect |
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Technology transfer /
Patents (3 max.) |
| 1. Procedeu de preparare a compozitelor feroelectric-rasină epoxidică cu gradient compozițional pentru adaptare de impedanță în domeniul 2 - 4 GHz, si compozite astfel obtinute, Liliana Mitoseriu, Vasilica Pascariu, Cristina E. Ciomaga, Nr. OSIM RO130439- |
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| 2. Compozit ceramic de tipul xCoFe2O4-(1-x)PbTiO3 si procedeul de obtinere a acestuia, Cristina E. Ciomaga, Mirela Airimioaei, Liliana Mitoseriu, Nicoleta Lupu, OSIM Nr. A/00314 2017, 132918/2022 |
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| 3. Senzor de câmp magnetic variabil cu structură magnetoelectrică stratificată din ceramică Pb(Zr,Ti)O3 și microbenzi din Fe78Si9B13, Florin. M. Tufescu, Liliana Mitoseriu, Cristina E. Ciomaga, Nicoleta Lupu, Mihai V. Pop, Florin Tufescu, OSIM Nr. A/0042 |
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Other relevant information |
90 scientific publications: 74 ISI articles and 8 articles published in international journals without impact factor and 8 articles published in conference volumes;
ISI score of 229.5; Individual ISI=29.83; 82.4% articles in the Q1/Q2 area (46 papers in Q1 journals, 15 in Q2 and 13 in Q3);
Hirsh-factor h=24 (WOS), 24 (Scopus), 26 (Google Scholar).
CNATDCU coefficients: A=5,38, I=6,89, P=17,59, C=228,9; T=33,87, (according to minimum CNATDCU criteria for teacher/CSI: A>2, I>4, P>4, C>40, h>10, T>12)
Over 1300 citations in ISI journals without self-citations;
3 invention patents and 1 national CBI, OSIM;
1 book chapter, Elsevier International Publishing House.
Guest editor for Materials (IF=3,748, Q1 journal)
More than 150 presentations at international and national conferences, of which 15 guest presentations and >50 oral presentations;
Reviewer for more than 10 international ISI journals: J. Alloys Compd., Ceram. Intl., J. Eur. I was praying. Soc., J. Mater. Sci., J. Phys. D and Nanotechnology etc. Sci. Tech. Adv. Matter; Additive Manufacturing, Langmuir, etc.
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