Single-domain HTC superconducting materials synthesis: BaZrO3 substrates as a tool for optimized systems

Benedicte Robertz; Frederic Boschini; Andre Rulmont; Marcel Ausloos; Rudi Cloots

doi:10.1117/12.435843

10 August 2001 Single-domain HTC superconducting materials synthesis: BaZrO₃ substrates as a tool for optimized systems

Benedicte Robertz, Frederic Boschini, Andre Rulmont, Marcel Ausloos, Rudi Cloots

Proceedings Volume 4412, International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals; (2001) https://doi.org/10.1117/12.435843
Event: International Conference on Solid State Crystals 2000, 2000, Zakopane, Poland

Abstract

Large Dy-123 single-domains have been grown y the top- seeding melt-textured growth technique on yttrium oxide substrates. The main obstacles in fabricating such 'single grain' 123 superconducting samples are discussed, i.e. (I) the dissolution of the seed during the melting and the peritectic cooling stages, (ii) the nucleation of subsidiary 123 grains at the compact/substrate interface. Such secondary nucleation process prevents the single grain from going further. Solutions are suggested as for example by considering the use of a modified coating. BaZrO₃ displays a strong inertia in barium cuprate fluxes which suggests to use it as a very promising candidate for buffer layer in between the 123 compact and the furnace 'environment'. In order to provide such 'high quality' sufficiently dense BaZrO₃ coatings, soft solution routes have been investigated. Advantages of these are a low calcination temperature and the production of very homogeneous and fine monodisperse powders. The influence of the synthesis conditions on the properties of BaZrO₃ and on the sintering process is thus reported.

Citation Download Citation

Benedicte Robertz, Frederic Boschini, Andre Rulmont, Marcel Ausloos, and Rudi Cloots "Single-domain HTC superconducting materials synthesis: BaZrO₃ substrates as a tool for optimized systems", Proc. SPIE 4412, International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals, (10 August 2001); https://doi.org/10.1117/12.435843

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