Adriana Asenova Georgieva

@btu.bg

Department of Chemical technology, Faculty of Technical science
Burgas State Univerity Prof. d-r Assen Zlatarov

Adriana Asenova Georgieva


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https://researchid.co/adrianageorgieva

RESEARCH, TEACHING, or OTHER INTERESTS

Chemical Engineering, Fluid Flow and Transfer Processes, Process Chemistry and Technology, Ceramics and Composites
14

Scopus Publications

70

Scholar Citations

5

Scholar h-index

Scopus Publications

  • Phase analysis and color characteristics of Co-, Cu-, and Ni-doped ceramic pigments
    Bulgarian Chemical Communications, 2026
  • Synthesis, characterization and application aspects of barium titanate-based ceramic samples with graphene nanostructures introduced
    Georgieva, Yovkova, Panayotova
    Bulgarian Chemical Communications, 2025
    The share of research work aimed at finding innovative approaches to the synthesis of new porous ceramic products to be applied as filters for purification of waste waters, as adsorbents, heat-insulation materials and other components with high thermal resistance, as well as biomedical and catalytic substrates has recently increased.The present paper reports for the preparation of barium titanate-based ceramic samples containing up to 2 mass % of graphene nanostructures (graphene nanoplatelets GnP), synthesized by the method of solid-state sintering.The methods of X-ray diffraction, FT-IR spectroscopy, scanning electron microscopy and light microscopy were used for the characterization of the initial blends and the titanate ceramic samples obtained from them.The results of the analyses showed that the introduced nanoadditive initiated the formation of fine-grain porous structure with grain sizes from 0.5 to 1 m.Some basic physicomechanical properties of the samples synthesized were determined, e.g., water absorption (, %), apparent density ( , , / 3 ) and apparent (open) porosity ( , %).The apparent density was close to the theoretical one -5.51/ 3 , the open porosity was 2.04 % and the minimal water absorption -0.37 %.Some aspects of application are proposed.
  • Synthesis and properties of Cu-doped finely dispersed ceramic pigments
    Yovkova, Minova, Georgieva, Markovska
    Bulgarian Chemical Communications, 2025
  • Synthesis and properties of Ni-doped finely dispersed ceramic pigments
    Minova, Yovkova, Markovska, Georgieva
    Bulgarian Chemical Communications, 2025
  • Synthesis of Ceramic Pigments from the System Al2O2-SiO2 by Utilization of Rice Husk Ash as Silica Source
    Adriana Georgieva, Mariela Minova, Irena Markovska, Fila Yovkova, Georgi Avdeev, et al.
    Wseas Transactions on Environment and Development, 2025
    In this work, the synthesis of ceramic pigments from the system Al2O3 - SiO2 by utilization of rice husk ash (RHA) as a silica source is considered. For comparison, pigments from pure raw materials were also synthesized. All compositions were synthesized at 1450°С. The amount of chromophore in the compositions was 5%. Co, Cu, and Ni were used as chromophore elements, introduced respectively as Co2O3, CuO, or NiO. The pigments were studied by several methods - XRD, FT-IR, EPR, and spectral colour determination. By Xray diffraction, a qualitative and quantitative analysis of the synthesized pigments was made. The colour characteristics are determined spectrally by a tintometer of Lovibond Tintometer RT 100 Color. The pigments with cobalt chromophore have the best indicators, in which (b) = - 24.1 when using SiO2.nH2O and (b) = -27.4 when using RHA. The possibility of replacing pure silica with one obtained from oxidized rice husks was proven.
  • LOW-TEMPERATURE SYNTHESIS OF FINE-POROUS CORUNDUM BASED ON INCORPORATED GRAPHENE NANOSTRUCTURES
    Adriana Asenova Georgieva, Fila Slavova Yovkova, Margarita Anatolievna Georgieva, Irena Georgieva Markovska
    Journal of Chemical Technology and Metallurgy, 2024
    In the present paper, the effect of the addition of graphene nanostructures and 3 mass % TiO2 on the microstructure and properties of sintered corundum ceramics were studied. Fine-porous corundum ceramics were obtained by the method of solid-phase sintering at relatively low temperatures of 1450oC, by adding graphene nanostructures in an amount of 2 % or 20 %. To lower the synthesis temperature, 3 mass % TiO2 was added to the initial ceramic blends. As a result of the solid solution formed between Al2O3 and TiO2, a well-sintered corundum ceramic is obtained at synthesis temperature lower than that of pure corundum - 1450oС. For the characterization of the initial blends and the ceramic samples, the methods of X-ray phase analysis, infrared spectroscopy, SEM, TEM EDS and visual microscopy were used. Besides, the basic physicochemical properties of the samples synthesized based on corundum were determined, e.g. water absorption (WA, %), apparent density (AD, %) and apparent (open) porosity (Pa, %).
  • OBTAINING OF GARNET CERAMIC MATERIALS BY UTILIZATION OF RICE HUSK ASH AS SILICA SOURCE
    Mariela Ganeva Minova, Adriana Asenova Georgieva, Tsvetan Ivanov Dimitrov, Fila Slavova Yovkova, Irena Georgieva Markovska
    Journal of Chemical Technology and Metallurgy, 2024
    The current research aims at the obtaining of new type pigments from the garnet mineral group by utilizationof rice husk ash as silica source (RHA). At the beginning, the mixtures prepared from the starting raw materials areground in a ball mill and then subjected to high temperature treatment. Green pigments were synthesized at twotemperatures: 1000°C and 1100°C. Using the tintometer RT 100 Lovibond the colour characteristics were measuredspectrophotometrically. The rice husk ash was investigated using scanning electron microscopy. The conducted hot-stage microscopic studies show that the pigments remain thermally stable when heated. The highest fire resistance - upto temperatures of 1380°C - 1400°C show the uvarovite pigments with main phase 3CaO.Cr2O3.3SiO2 or by a generalformula Ca3Cr2[SiO4 ]3. They are suitable for inserting into ceramic glazes without danger of decomposition or reaction.Keywords: ceramic pigments, SEM, colour determination, Hot-stage microscopy.
  • USING THE ADVANTAGES OF NANOTECHNOLOGY FOR THE PRODUCTION OF COMPOSITE MATERIALS OF THE TYPE NGO/CERAMIC MATRIX
    Adriana Asenova Georgieva, Margarita Anatolievna Georgieva, Fila Slavova Yovkova, Krasi Zlatinova Panayotova, Irena Georgieva Markovska
    Journal of Chemical Technology and Metallurgy, 2024
    Using the advantages of nanotechnology, composite ceramic materials of the type of graphene oxide nanocolloid/ceramic matrix were obtained in two stages. First, finely porous corundum (1500ºC) and barium titanate (1300ºC)ceramic samples containing 2 mass % graphene structures nanoplatelets were synthesized. The next stage of the study involved the preparation of graphene oxide in nanocolloid form (2 mg/ml, dispersion in H2O) which was impregnated in the solid porous ceramic samples to obtain composite materials. For the characterization of the ceramic samples, mainly infrared spectroscopy, X-ray phase analysis, scanning electron microscopy and light microscopy were used. The results obtained from the studies carried out showed that with the introduction of small amount of graphene nanoplatelets in the initial blends followed by solid state sintering, part of the added graphene is burned out which imparts significant porosity to the ceramics obtained. On the other hand, the addition of graphene initiates the formation of well-shaped fine-grain structure of the ceramic samples, and they had sufficient porosity.
  • OBTAINMENT OF BARIUM TITANATE CERAMIC SAMPLES AND DETERMINATION OF THEIR BASIC PHYSICOCHEMICAL PROPERTIES
    Oxidation Communications, 2023
  • Preparation and characterization of NGO/Al2O3 composite ceramic materials
    Georgieva, A. Georgieva, Panayotova, Yovkova, Markovska
    Bulgarian Chemical Communications, 2023
    The present paper reports on the application of a two-stage technology for the preparation of composite ceramic material of the graphene/ceramic matrix type.Firstly, finely porous corundum ceramic material was obtained using the solid-state sintering method at comparatively low temperatures for corundum materials -1500C -by adding graphene at a concentration of 2 mass %, as well as 3 mass % TiO2.In the second stage of the experiment, graphene oxide was obtained in nano colloid form (2 mg/ml, dispersed in H2O) which was impregnated into the solid porous corundum samples synthesized to obtain a composite ceramic material of the NGO/Al2O3 type.In the characterization of the ceramic samples, mainly infrared spectroscopy, X-ray phase analysis, scanning and transmission electron microscopy, and light microscopy were used.Some important physicochemical properties of the synthesized samples were determined: water absorption (WA, %), apparent density (app, g/cm 3 ), and apparent (open) porosity (Papp, %).The samples were found to have homogeneous, fine-grain, and finely porous structure.
  • SYNTHESIS AND PROPERTIES OF CHROMIUM-BASED GARNET PIGMENTS
    Journal of Chemical Technology and Metallurgy, 2023
  • Experimental determination of mass transfer coefficient by rectification in a laboratory column equipped with three sieve trays
    Oxidation Communications, 2019
  • Obtaining nanostructured catalyst systems and study of catalytic efficiency
    Oxidation Communications, 2019
  • Determination of Interphase surface by rectification process in a laboratory column
    Oxidation Communications, 2018

RECENT SCHOLAR PUBLICATIONS

  • STUDY AND ANALYSIS OF THE INTERFACIAL AREA IN THE RECTIFICATION OF TWO-COMPONENT MIXTURES IN THE PRESENCE OF AN ANTI-FOAMING AGENT
    MK KARAIVANOVA, AA GEORGIEVA
    Oxidation Communications 49 (1), 199-208 , 2026
    2026
  • COLOR CHARACTERISTICS AND PROPERTIES OF HIGH-TEMPERATURE CERAMIC PIGMENTS, OBTAINED BY UTILIZATION OF BIO-WASTE
    I MARKOVSKA, M MINOVA, F YOVKOVA, A GEORGIEVA
    TPM–Testing, Psychometrics, Methodology in Applied Psychology 32 (S8 (2025 … , 2025
    2025
  • Synthesis of Ceramic Pigments from the System Al2O3-SiO2 by Utilization of Rice Husk Ash as Silica Source
    A Georgieva, M Minova, I Markovska, F Yovkova, G Avdeev, D Komunova
    WSEAS TRANSACTIONS on ENVIRONMENT and DEVELOPMENT 21, 1001-1009 , 2025
    2025
  • NANOTECHNOLOGIES IN WASTE WATER TREATMENT
    A Georgieva, R Koleva, K Panayotova, G Peeva
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2025 64 (book 10.1 Chemical technologies … , 2025
    2025
  • Investigation and characterization of corundum ceramics with added nanostructures
    AG Georgieva, M Georgieva, K Panayotova, M Valchanova
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2025 64 (book 10.1 Chemical technologies … , 2025
    2025
  • SYNTHESIS AND STUDY OF Ni-MULLITE CERAMIC PIGMENTS OBTAINED BY SOL-GEL TECHNOLOGY
    T Dimitrov, CAF Yovkova, I Markovska, A Georgieva
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2025 64 (book 10.1 Chemical technologies … , 2025
    2025
  • SYNHTESIS OF HIGH-TEMPERATURE CERAMIC PIGMENTS
    F Yovkova, M Minova, A Georgieva, T Dimitrov, I Markovska
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2025 64 (book 10.1 Chemical technologies … , 2025
    2025
  • Synthesis, characterization and application aspects of barium titanate-based ceramic samples with graphene nanostructures introduced
    A Georgieva, F Yovkova, K Panayotova
    BULGARIAN CHEMICAL COMMUNICATIONS 57 (Special Issue E), 13-16 , 2025
    2025
  • Synthesis and properties of Ni-doped finely dispersed ceramic pigments
    M Minova, F Yovkova, I Markovska, A Georgieva
    BULGARIAN CHEMICAL COMMUNICATIONS 57 (Special Issue E), 17-22 , 2025
    2025
  • Synthesis and properties of Cu-doped finely dispersed ceramic pigments
    F Yovkova, M Minova, A Georgieva, I Markovska
    BULGARIAN CHEMICAL COMMUNICATIONS 57 (Special Issue E), 76-82 , 2025
    2025
  • Obtaining of garnet ceramic materials by utilization of rice husk ash as silica source
    MG Minova, AA Georgieva, TI Dimitrov, FS Yovkova, IG Markovska
    Journal of Chemical Technology and Metallurgy 59 (6), 1461-1468 , 2024
    2024
    Citations: 2
  • Low-temperature synthesis of fine-porous corundum based on incorporated graphene nanostructures
    AA Georgieva, FS Yovkova, MA Georgieva, IG Markovska
    Journal of Chemical Technology and Metallurgy 59 (6), 1415-1420 , 2024
    2024
    Citations: 1
  • USING THE ADVANTAGES OF NANOTECHNOLOGY FOR THE PRODUCTION OF COMPOSITE MATERIALS OF THE TYPE NGO/CERAMIC MATRIX
    AA Georgieva, MA Georgieva, FS Yovkova, KZ Panayotova, IG Markovska
    Journal of Chemical Technology and Metallurgy 59 (6), 1399-1405 , 2024
    2024
    Citations: 2
  • POSSIBILITIES OF OBTAINING NANOCOMPOSITE MATERIALS AS ADSORBENTS FOR WASTE WATER TREATMENT
    A Georgieva, R Koleva, G Peeva, K Panayotova
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2024 63 (book 10.1), 25-29 , 2024
    2024
    Citations: 1
  • SIMULATING THE PROCESS OF OBTAINING CORUNDUM CERAMICS WITH INCORPORATED GRAPHENE NANOSTRUCTURES
    M Georgieva, S Pavlov, I Markovska, A Georgieva
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2024 63 (book 10.1), 13-18 , 2024
    2024
  • STUDYING THE EFFECT OF NANO-ADDITIVES IN THE LOW-TEMPERATURE SYNTHESIS OF CORUNDUM CERAMICS
    A Georgieva, F Yovkova, K Panayotova
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2023 62 (book 10.1), 124-129 , 2023
    2023
  • INVESTIGATION OF THE STRUCTURE OF GARNET PIGMENTS OBTAINED FROM PURE AND WASTE RAW MATERIALS BY USING OF ELECTRON PARAMAGNETIC RESONANCE
    F Yovkova, A Georgieva, M Dimitrov, Tsvetan, Minova
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2023 62 (book 10.1), 58-63 , 2023
    2023
  • Preparation and characterization of NGO/Al2O3 composite ceramic materials
    IGM M. A. Georgieva, A. A. Georgieva, K. Z. Panayotova, F. S. Yovkova
    Bulgarian Chemical Communications DOI: 10.34049/bcc.55.3.SIMNS04 55 (3 … , 2023
    2023
  • OBTAINMENT OF BARIUM TITANATE CERAMICSAMPLES AND DETERMINATION OF THEIR BASICPHYSICOCHEMICAL PROPERTIES
    A Georgieva, F Yovkova, M Georgieva, P Krasi
    Oxidation Communications 46 (2), 450–458 , 2023
    2023
    Citations: 4
  • SYNTHESIS AND PROPERTIES OF CHROMIUM-BASED GARNET PIGMENTS
    F Yovkova, M Minova, T Dimitrov, A Georgieva, M I.
    Journal of Chemical Technology and Metallurgy 58 (1), 68-74 , 2023
    2023
    Citations: 3

MOST CITED SCHOLAR PUBLICATIONS

  • Microemulsion water-in-oil (W/O)—microreactor for synthesis of ultrafine carbonate nanostructures
    A Georgieva, B Bogdanov, Z Stefanov, D Koleva
    University of Ruse Union of Scientists-Ruse 50 (9), 34-38 , 2011
    2011
    Citations: 9
  • Nano-sized BaCO3 particles–a study the effects of the physicochemical conditions on the synthesis in a water in oil microemulsion systems
    A Georgieva, C Karagiozov, J Ulrich, B Bogdanov, Y Denev
    transport phenomena 1, 13 , 2010
    2010
    Citations: 9
  • Determination of Interphase surface by rectification process in a laboratory column
    Z Ivanov, A Georgieva, K Panayotova
    Oxidation Communications 41 (3), 365-371 , 2018
    2018
    Citations: 6
  • Microemulsions–properties, application and perspectives
    A Georgieva, K Panayotova, B Bogdanov, Z Stefanov
    Science & Technologies 2 (4), 1-5 , 2012
    2012
    Citations: 6
  • POSSIBILITIES FOR THE PREPARATION OF CERAMIC MATERIALS INCORPORATING GRAPHENE AND CARBONATE NANOSTRUCTURES
    A Georgieva, F Yovkova, K Panayotova, M Georgieva, M Minova
    Reports Awarded with "Best Paper" Crystal Prize 2022, Ruse, Bulgaria, 167-173 , 2022
    2022
    Citations: 5
  • OBTAINMENT OF BARIUM TITANATE CERAMICSAMPLES AND DETERMINATION OF THEIR BASICPHYSICOCHEMICAL PROPERTIES
    A Georgieva, F Yovkova, M Georgieva, P Krasi
    Oxidation Communications 46 (2), 450–458 , 2023
    2023
    Citations: 4
  • Разработване на методика за получаване на карбонатни наноразмерни частици в обратна микроемулсионна система,“Химични, биохимични технологии и опазване на околната среда …
    A Георгиева, Б Богданов
    Школа 10, 12.11 , 2011
    2011
    Citations: 4
  • SYNTHESIS AND PROPERTIES OF CHROMIUM-BASED GARNET PIGMENTS
    F Yovkova, M Minova, T Dimitrov, A Georgieva, M I.
    Journal of Chemical Technology and Metallurgy 58 (1), 68-74 , 2023
    2023
    Citations: 3
  • EXPERIMENTAL DETERMINATION OF MASS TRANSFER COEFFICIENT BY RECTIFICATION IN A LABORATORY COLUMN EQUIPPED WITH THREE SIEVE TRAYS.
    A Georgieva, Z Ivanov, K Panayotova
    Oxidation Communications 42 (2) , 2019
    2019
    Citations: 3
  • Obtaining nanostructured catalyst systems and study of catalytic efficiency
    A Georgieva, K Panayotova, ZH IVANOV
    Oxidation Communications 42 (2), 121-131 , 2019
    2019
    Citations: 3
  • A study the effect of the concentration of the initial solutions of reagents in the synthesis of monodispersed nano-sized particles of BaCO3 in a reverse microemulsion system
    A Slavova, C Karagiozov, B Bogdanov
    Annual Assen Zlatarov University, Bourgas 35, 1 , 2006
    2006
    Citations: 3
  • Obtaining of garnet ceramic materials by utilization of rice husk ash as silica source
    MG Minova, AA Georgieva, TI Dimitrov, FS Yovkova, IG Markovska
    Journal of Chemical Technology and Metallurgy 59 (6), 1461-1468 , 2024
    2024
    Citations: 2
  • USING THE ADVANTAGES OF NANOTECHNOLOGY FOR THE PRODUCTION OF COMPOSITE MATERIALS OF THE TYPE NGO/CERAMIC MATRIX
    AA Georgieva, MA Georgieva, FS Yovkova, KZ Panayotova, IG Markovska
    Journal of Chemical Technology and Metallurgy 59 (6), 1399-1405 , 2024
    2024
    Citations: 2
  • Study of the effect of surface tension and its influence on specific interfacial area in distillation laboratory column
    Z Ivanov, M Karaivanova, D Georgiev, A Georgieva
    Science & technologies, VI 4, 42-47 , 2016
    2016
    Citations: 2
  • Low-temperature synthesis of fine-porous corundum based on incorporated graphene nanostructures
    AA Georgieva, FS Yovkova, MA Georgieva, IG Markovska
    Journal of Chemical Technology and Metallurgy 59 (6), 1415-1420 , 2024
    2024
    Citations: 1
  • POSSIBILITIES OF OBTAINING NANOCOMPOSITE MATERIALS AS ADSORBENTS FOR WASTE WATER TREATMENT
    A Georgieva, R Koleva, G Peeva, K Panayotova
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2024 63 (book 10.1), 25-29 , 2024
    2024
    Citations: 1
  • MULLITE CERAMIC PIGMENTS OBTAINED FROM BIOWASTE - RICE HUSK
    F Yovkova, M Minova, T Dimitrov, A Georgieva
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2022 61 (book 10.1 Chemical technologies … , 2022
    2022
    Citations: 1
  • CERAMIC PIGMENTS BASED ON THE MINERAL MULLITE /3AL2O3.2SO2/
    F Yovkova, M Minova, T Dimitrov, A Georgieva
    PROCEEDINGS OF UNIVERSITY OF RUSE - 2022 61 (book 10.1 Chemical technologies … , 2022
    2022
    Citations: 1
  • Microemulsion water in oil (w/o)-evaluation of the surface tension forces and study the influence of some factors on the size of carbonate formed nanostructures
    A Georgieva, K Panayotova, J Ivanov
    International Journal of Engineering Technology and Scientific Innovation 2 … , 2017
    2017
    Citations: 1
  • TURBULENCE MODELS COMPARISON FOR EXTERNAL FLOWS WITH HIGH-REYNOLDS NUMBER AROUND FLAT OBJECT
    D Georgiev, Z Ivanov, A Georgieva
    Science & Technologies 6 (3), 95-102 , 2016
    2016
    Citations: 1