Patents

A process for the preparation of a low contact resistance contact on high transition temperature superconductors which comprises making a groove at the end of the high transition temperature superconductor(l), depositing a first silver layer(2) by metal spray gun at a temperature 120°C, heating the said deposited silver layer at a temperature in a range of 200-250°C for a time period in the range of 2-5 hrs, wrapping a perforated silver foil (3,4) on the said heat treated first silver layer, depositing a second silver layer(5) by metal spray gun at a temperature of 120°C, heating the said combination of first silver layer, wrapped perforated silver foil and second silver layer at a temperature in a range of 830-850°C in air for a time period in the range of 100-150 hrs resulting in a joint with the superconductor.