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WHAT IS A SUPERCONDUCTOR?

 “THE SOLUTION TO HOW WE TRANSPORT ELECTRICITY” 

“Even the worlds best copper wires are fundamentally like the old fashioned toasters: they produce heat = wasted energy. Normal wires, even though made from gold, silver or copper, all have a finite electrical resistivity even when cooling to the absolute zero. Superconductors have ZERO RESISTIVITY below a typical cryogenic transition temperature – meaning NO ENERGY LOSS when transporting direct electrical current.  Yes, cryogenic means that cooling is needed. However, these wires operate using very cost effective liquid nitrogen – overall, employing superconductors typically reduce the total systems energy losses by a factor of 10, or more! Superconductors permit extremely compact systems designs being able to carry roughly more than 100 times more current than copper. Superconductors carrying an alternating current are not completely “loss less” and heat is generated in the superconducting wire. The worlds best performing technical superconducting tapes made from YBaCuO (ceramic oxide) thin film deposited on strong metallic substrates can sustain very high currents even in very high magnetic fields (30T+). There are major drawbacks with the standard flat and wide tape geometry.”

 

The MAIN PROBLEM is the CONDUCTOR WIDTH and FILAMENTIZATION is THE SOLUTION.

 

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3D MULTIFILAMENTARY TAPES 

a game changer

 

 COATED CONDUCTOR WITH SUBRA’s MULTIFILAMENTARY SUBSTRATE

 

“3D MF-tape technology by SUBRA is based on a unique surface profile modification concept developed at the Department of Energy Conversion and Storage, Technical University, Denmark. Filamentization of the superconducting layer (black in the figure) self-forms during deposition of the superconducting layer as our 3D profile effectively shades the lower parts of the tape. We first demonstarted MF-tape technology using commercial production systems in 2015. It has subsequently been advanced in collaboration with mulitple commercial HTS vendors. Superconducting stacks were for example produced by pulsed laser deposition at Bruker HTS GmbH, or by metal organic chemical vapor deposition at SuperPower Inc. The above sketch shows a two buffer layers, the black superconducting layer (2-5 µm thin), silver layer protection and copper capping.”

 

“3D structured surface yields self-forming filaments” 

SUBRA is producing special metal substrates for coated conductor tapes designed for ultra strong and high performance electromagnets, electrical transformers and power applications

The industrial filament solution – km tape lengths for climate friendly energy applications

Easy processing – employ MF-tape directly in industrial processing systems

Full tape width is operational – designed for high performance

No need for post processing – increasing production yield

Enabled low cost filamentization 

 

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SUBRA NP SUBSTRATES 

 – high quality, high volume substrates 

 

 COATED CONDUCTOR ARCHITECTURE

Standard 30-100 µm thin & mechanically strong Hastelloy C276 tape

Large industrial production (2.5 km piece length capacity)

Ultra smooth substrates (roughnes < 2-3 nm)

 

Check out SUBRA’s innovative solutions in the selected peer-reviewed references