Erika Mudra
Slovak Academy of Sciences
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Publication
Featured researches published by Erika Mudra.
Materials Science Forum | 2017
Erika Mudra; Magdaléna Strečková; Alexandra Kovalčíková; Martin Šebek; Vladimir Girman; Ján Dusza
In this study the needle-less electrospinning by means of “NanospiderTM“ (ELMARCO) as technology for the preparation of fine α-Al2O3 fibers with diameters of 0.5 - 1.5 µm is presented. The fabrication consists of three steps: i) preparation of spinning solution, ii) electrospinning of the prepared solution and collection of the composite fibers, iii) calcination of the composite precursor fibers. The electrospun fibers were prepared from polyacrylonitrile/N,N-dimethylformamide (PAN/DMF) polymer solution and Al(NO3)3.9H2O in ratio 1/10/1. Thereafter, the precursor fibers were calcined in the furnace at 900, 1100 and 1200 °C with a rate of 5 °C/min in air. The formation of crystalline phases, surface morphology and diameters of metastable and final alumina fibers were characterized using thermogravimetric analysis, X-ray diffraction analysis, the scanning electron microscopy and transmission electron microscopy. The precursor PAN/Al(NO3)3 fibers were amorphous. The thermal treatment leads to the phase transition from γ-Al2O3 to α-Al2O3 accompanied by removing of polyacrylonitrile (PAN). The fine porous microfibers composed of pure α-Al2O3 phase were prepared after calcinations at 1200 °C.
Chemical Engineering Journal | 2016
Magdaléna Strečková; Erika Mudra; R. Orinakova; L. Markusova-Buckova; Martin Šebek; Alexandra Kovalčíková; Tibor Sopcak; V. Girman; Zuzana Danková; Matej Mičušík; Ján Dusza
Journal of The European Ceramic Society | 2017
Richard Sedlák; Alexandra Kovalčíková; Vladimir Girman; Erika Mudra; Paweł Rutkowski; Aleksandra Dubiel; Ján Dusza
Journal of The European Ceramic Society | 2017
Richard Sedlák; Alexandra Kovalčíková; Erika Mudra; Paweł Rutkowski; Aleksandra Dubiel; Vladimir Girman; Roman Bystrický; Ján Dusza
International Journal of Refractory Metals & Hard Materials | 2017
Richard Sedlák; Alexandra Kovalčíková; Ján Balko; Paweł Rutkowski; Aleksandra Dubiel; Dariusz Zientara; Vladimir Girman; Erika Mudra; Ján Dusza
Applied Surface Science | 2017
Erika Mudra; Magdaléna Strečková; D. Pavlinak; Veronika Medvecká; Dušan Kováčik; Alexandra Kovalčíková; P. Zubko; V. Girman; Z. Dankova; V. Koval; J. Duzsa
Materials Letters | 2016
Helena Bruncková; Lubomir Medvecky; Jaroslav Briančin; Juraj Durisin; Erika Mudra; Martin Šebek; Alexandra Kovalčíková; Tibor Sopcak
Journal of Alloys and Compounds | 2018
Helena Bruncková; Lubomir Medvecky; Erika Mudra; Alexandra Kovalčíková; Vladimir Girman
Materials & Design | 2017
Helena Bruncková; Erika Mudra; Lubomir Medvecky; Alexandra Kovalčíková; Juraj Durisin; Martin Šebek; Vladimir Girman
Journal of Rare Earths | 2017
Helena Bruncková; Lubomir Medvecky; Alexandra Kovalčíková; Martin Fides; Erika Mudra; Juraj Durisin; Martin Šebek; Maria Kanuchova; Jiri Skvarla