Ceramic substrate for bi-cuprate superconductors and a process f

Details Ceramic substrate for bi-cuprate superconductors and a process f Ceramic substrate for bi-cuprate superconductors and a process f

1996-11-27

1998-04-21

Bonner, Melissa

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

501104, 501152, C04B 3548

Patent

active

057417474

ABSTRACT:
A novel ceramic substrate useful for the preparation of superconductors, said substrate having the formula Ba.sub.2 DyMO.sub.5.5 where M represents at least one of the metals Zr, Sn and Hf and a process for the preparation of said ceramic substrate, which comprises (i)Reacting salts of dysprosium, barium and Zr, Sn or Hf in an organic medium, (ii) Pressing the resultant mixture in the form of pellets, (iii)Calcining the pellets by heating at a temperature in the range of 1000.degree. to 1200.degree. C., (iv)Repeating the calcination process for 30-45 h at temperature in the range of 1000.degree.-1200.degree. C. until a highly homogenous mixture is formed, (v)Grinding the calcined material and pelletizing at a pressure in the range of 3 to 4 tons/cm.sup.2, (vi) Sintering the resultant product at a temperature in the range of 1200.degree. to 1600.degree. C. for a period of 10 to 30 h, and then furnace cooled to room temperature.

REFERENCES:
patent: 5635453 (1997-06-01), Pique et al.

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