Low AC Loss Inkjet-Printed Multifilamentary YBCO Coated Conductors

Abstract

Abstract-Impressive performance has been achieved in (RE)Ba2Cu3O7-δ (REBCO) coated conductors, but for many applications, the high cost and AC losses remain prohibitive. Inkjet printing methods combine scalability and low equipment cost with high resolution patterning, potentially addressing both issues by enabling the production of multifilamentary coated conductors without subtractive processing.The successful production of multifilamentary superconducting YBa2Cu3O7-δ (YBCO) structures by inkjet printing of a low-fluorine YBCO precursor solution on SS/ABAD-YSZ/CZO substrates is reported. Two approaches have been developed. In the first method, YBCO filaments were deposited directly on the buffered substrate by piezoelectric printing; and in the second approach, CeO2 tracks were first printed to pattern a subsequently overprinted YBCO film, creating a multifilamentary structure by an inverse technique. Scanning Hall probe measurements have been used to compare the filamentary structures and critical currents achieved by both methods, and a Jc of up to 3 MA cm -2 has been obtained at 77 K. For the inverse printing approach, the AC hysteresis losses have also been measured and compared with theoretical models.  Index Terms-AC losses, digital printing, high-temperature superconductors, multifilamentary superconductors, yttrium barium copper oxide.

Inkjet Printing Multideposited YBCO on CGO/LMO/MgO/Y2O3/Al2 O3/Hastelloy Tape for 2G-Coated Conductors

“…An advantage of Inkjet printing is that it permits patterning structures. Stripes of YBCO for AC-losses reduction have been successfully prepared on both RABiTs (Rolling-Assisted Biaxially Textured Substrates) [6] and ABAD (Alternating Beam Assisted Deposition) [7], [8] CC architectures. The ABAD method enables the use of a polycrystalline substrate, however it must be textured through a thick layer (> 1µm) of YSZ [9].…”

Topical Review: Multifilamentary coated conductors for ultra-high magnetic field applications

“…A gap width of 100 µm was reported for the studies in [155] and good reproducibility of printed tracks was obtained. In 2016, Hopkins et al [157] demonstrated an inverse technique where printed narrow CeO 2 tracks effectively separated a subsequently overprinted REBCO layer. The authors used a low-fluorine YBCO precursor solution deposited on an SS/ABAD-YSZ/CZO substrate architecture and demonstrated functional filaments.…”