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Dive into the research topics where Erika Mudra is active.

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Featured researches published by Erika Mudra.


Materials Science Forum | 2017

Preparation of Alumina Fibers by Needle-Less Electrospinning

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

Nickel and nickel phosphide nanoparticles embedded in electrospun carbon fibers as favourable electrocatalysts for hydrogen evolution

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

Fracture characteristics of SiC/graphene platelet composites

Richard Sedlák; Alexandra Kovalčíková; Vladimir Girman; Erika Mudra; Paweł Rutkowski; Aleksandra Dubiel; Ján Dusza


Journal of The European Ceramic Society | 2017

Boron carbide/graphene platelet ceramics with improved fracture toughness and electrical conductivity

Richard Sedlák; Alexandra Kovalčíková; Erika Mudra; Paweł Rutkowski; Aleksandra Dubiel; Vladimir Girman; Roman Bystrický; Ján Dusza


International Journal of Refractory Metals & Hard Materials | 2017

Effect of graphene platelets on tribological properties of boron carbide ceramic composites

Richard Sedlák; Alexandra Kovalčíková; Ján Balko; Paweł Rutkowski; Aleksandra Dubiel; Dariusz Zientara; Vladimir Girman; Erika Mudra; Ján Dusza


Applied Surface Science | 2017

Development of Al2O3 electrospun fibers prepared by conventional sintering method or plasma assisted surface calcination

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

Perovskite lanthanum niobate and tantalate thin films prepared by sol–gel method

Helena Bruncková; Lubomir Medvecky; Jaroslav Briančin; Juraj Durisin; Erika Mudra; Martin Šebek; Alexandra Kovalčíková; Tibor Sopcak


Journal of Alloys and Compounds | 2018

Structural properties of gadolinium orthoniobate and orthotantalate thin films prepared by sol-gel method

Helena Bruncková; Lubomir Medvecky; Erika Mudra; Alexandra Kovalčíková; Vladimir Girman


Materials & Design | 2017

Effect of lanthanides on phase transformation and structural properties of LnNbO4 and LnTaO4 thin films

Helena Bruncková; Erika Mudra; Lubomir Medvecky; Alexandra Kovalčíková; Juraj Durisin; Martin Šebek; Vladimir Girman


Journal of Rare Earths | 2017

Structural and mechanical properties of La1/3NbO3 and La1/3TaO3 thin films prepared by chemical solution deposition

Helena Bruncková; Lubomir Medvecky; Alexandra Kovalčíková; Martin Fides; Erika Mudra; Juraj Durisin; Martin Šebek; Maria Kanuchova; Jiri Skvarla

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Ján Dusza

Slovak Academy of Sciences

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Martin Šebek

Slovak Academy of Sciences

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Helena Bruncková

Slovak Academy of Sciences

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Juraj Durisin

Slovak Academy of Sciences

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Lubomir Medvecky

Slovak Academy of Sciences

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Tibor Sopcak

Slovak Academy of Sciences

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Richard Sedlák

Slovak Academy of Sciences

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Zuzana Danková

Slovak Academy of Sciences

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