Inkjet printing of multifilamentary YBCO for low AC loss coated conductors

11th European Conference on Applied Superconductivity

Hopkins, S.C.^1 ; Joseph, D.^1 ; Mitchell-Williams, T.B.^1 ; Calleja, A.^2,3 ; Vlad, V.R.^2,3 ; Vilardell, M.^2,3 ; Ricart, S.^3 ; Granados, X.^3 ; Puig, T.^3 ; Obradors, X.^3 ; Usoskin, A.^4 ; Falter, M.^5 ; Bäcker, M.^5 ; Glowacki, B.A.^1

Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge

CB3 0FS, United Kingdom^1

Institut de Ciencia de Materials de Barcelona (ICMAB), Barcelona, Spain^2

OXOLUTIA SL, Parc de Recerca de la UAB, Barcelona, Spain^3

Bruker HTS GmbH, Ehrichstraße 10, Hanau

63450, Germany^4

Deutsche Nanoschicht GmbH, Heisenbergstraße 16, Rheinbach

53359, Germany^5

关键词: Chemical solution deposition method;    Filamentary structures;    Patterning approaches;    Rebco coated conductors;    Scanning hall probes;    Subtractive processing;    Superconductor layers;    Three-dimensional structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/2/022010/pdf
DOI  :  10.1088/1742-6596/507/2/022010

来源: IOP

【 摘 要 】

Considerable progress has been made with the development of REBCO coated conductors in recent years, and high performance conductors are available commercially. For many applications, however, the cost remains prohibitive, and AC losses discourage their selection for higher frequency applications. Chemical solution deposition (CSD) methods are attractive for low-cost, scalable preparation of buffer and superconductor layers, and in many respects inkjet printing is the method of choice, permitting non-contact deposition with minimal materials wastage and excellent control of coating thickness. Highly textured coatings of YBCO and Gd-doped CeO2have previously been reported on buffered metal substrates. Inkjet printing also introduces the possibility of patterning - directly depositing two and three dimensional structures without subtractive processing - offering a low-cost route to coated conductors with reduced AC losses. In this contribution, the inkjet deposition of superconducting YBCO tracks is reported on industrially relevant buffered metal substrates both by direct printing and an inverse patterning approach. In the latter approach, ceria tracks were printed reported, which are a candidate both for resistive filament spacers and buffer layers. TFA-based precursor solutions have been printed on SS/ABAD-YSZ/CeO2and Ni-W/LZO/CeO2RABiTS substrates, and the resulting multifilamentary samples characterised by microscopy and scanning Hall probe measurements. The prospects for future inkjet-printed low AC loss coated conductors are discussed, including control of interfilamentary resistivity and bridging, transposed filamentary structures and stabilisation material.