بررسی ساختار YB2CU3O7- با XRD و SEM

The YBa2Cul07_6 (YBCO) superconductor ceramic has low critil..lil current density (Jc) because or weak linb between its grains. There have been a lot or effons to increase Jl. One or Ihe methods to increase Jc is to dope YBCO with other materials such as silver (Ag). In th is paper. the effect of adding silver to YBCO with the weight ratio of 0% 10%,15%. 20% and 30% on its mil:rostrul:lure have been investigated. The X-ray diffraction (XRO) ilnd scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) dj il gra Ul~ of ~ilmpb hilvc been obtained and studied. The study of XRD patterns shows 1ha1 Ag i~ l1 ppCilrs l iS a scparalc ph use in the sa mplc..c; ,.lOti the: position Ill' YBeQ peaks do nut considerable l:hangcs. The study or SEM of samples rcveal~ that the Ag ildtkd to YBea docs not prese nt in its micros tructure and doc~ nnt t.;hangt.: the lattice constants of YBeO by l:()n~lderllbk amount, and also thl: Ag grains remain among YBCO grains ami providc the better intcrgnmular contact. The pi..'rr.:l!nt<tl!~ 01 'iil'CI I'm optomll"mg the phy.;;(ill pfllpCr1It.:~ 01 YBeQ ~upcn;()nducturcs i~ almost 20.