Patent ID: 6493411
Filing Date: 2002-12-10
Classification: G21G,H01L

Abstract:
A process for enhancing the critical current density of a bulk body article composed having Li intimately distributed in a composition of a high temperature superconducting composition, comprising the steps of:positioning a bulk body article in a position to be irradiated comprised of a composition of the formula L1M2Cu3O6+d, T2Mâ€²2CanCun+1O6+2n, (L+M)3-zDzCu3O6+d, or T2Mâ€²2Can(Cu1-zâ€²Dzâ€²)n+1O6+2n, wherein L is yttrium, lanthanum, neodymium, samarium, europium, gadolinium, dysprosium, holmium, erbium, thulium, ytterbium, or lutetium, or mixtures thereof including mixtures with scandium, cerium, praseodymium, terbium, M is barium, strontium or mixtures thereof; â€œzâ€  is greater than zero and equal to or less than 0.3; â€œdâ€  is from about 0.7 to about 1.0; T is bismuth and Mâ€² is strontium or T is thallium and Mâ€² is barium; and â€œnâ€  is a number from about 1 to about 3, â€œzâ€²â€  is greater than zero and less than or equal to 0.5; and D is Li; wherein the Li is present in an amount to provide for a 6Li:Cu ratio of at least about 2.5Ã—10âˆ’8; radiating the bulk body article with thermal neutrons until a quantity of the Li content of such body portion undergoes thermal neutron induced reaction to produce 4He.