Effect of Partial Substitution of Ag and Sr on Structural Properties of the Superconductor Compound Tl2-xAgxBa2¬-ySryCa2Cu3O10+ at High Temperatures

Abstract

  The sample of high temperature superconductivity of  type Tl-2223

 ( Tl₂ Ba₂Ca₂Cu₃O_10+d  ) have been prepared by using solid state reaction method . The samples have been prepared at the sintering temperature (840^o C) for (24h ) at average heating rate

( 2^o C/ Min  )  and hydrostatic pressure (8 ton  /  cm²).

The partial substitution effect of(Ag) in (Tl) and ( Sr ) in ( Ba ) in the compound as

(Tl₂Ba₂­_-ySr_yCa₂Cu₃O_10+d )  has been investigated  where (x= y= 0.1, 0.2  and 0.3).  The X-Ray diffraction patterns were obtained , the compound has been characterized as  ( Tl-2223 ) having tetragonal structure with lattice parameters ( a=b=3.91  ) and (c= 33.54 for ( x=y=0 ). Also the X-Ray diffraction data showed that the structure of the compound is tetragonal phase in the rang