Browsing by Author "Nurgaliev T."

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    EFFECT OF GRAPHENE OXIDE AND REDUSED GRAPHENE OXIDE ON ELECTRICAL PROPERTIES OF YBCO AND YBCO/Ag COMPOSITES
    (2020-01-01) Staneva A.; Mateeva J.; Martinov B.; Blagoev B.; Nurgaliev T.
    Series of bulk composites based on YBCO superconductors, silver and graphene oxide/reduced graphene oxide are synthesized. The aim of this study is to determine the effect of GO and RGO on the superconducting properties of YBCO composites. Series of YBCO and YBCO/Ag phases are synthesized by the ceramic method. GO and RGO are obtained by the modified Hammer’s method. Series of YBCO, YBCO/Ag composites with GO or RGO are studied. The temperatures of the superconducting transition of the obtained composites are determined and the effect of GO/ RGO is investigated
  • No Thumbnail Available
    Item
    Synthesis and characterization of ybco and ybco/ag superconducting ceramic composites containing reduced graphene oxide
    (2019-01-01) Mateeva J.; Staneva A.; Martinov B.; Blagoev B.; Nurgaliev T.
    The high-temperature ceramic superconductors and nanomaterials are among the most promising groups of materials that are intensively studied. Graphene is a new material with unique electrical, optical and biological properties. The high mobility of graphene charges implies the possibility of using it as a suitable additive improving the superconductors' physical characteristics. The idea of this study is to synthesize series of bulk composites based on YBCO superconductors, silver and RGO with superconducting properties. The YBCO phase is obtained by a ceramic technology. It includes Ag aiming better sintering. Graphene is synthesized by a modified Hammer's method. XRD is applied to verify the obtaining of the starting phases. The synthesized composites are characterized by XRD, SEM and EDX analysis. All composites prepared are superconductive and have a Meissner effect.