Synthesis and Effect of Al2O3 Added in Yttrium Barium Copper Oxide YBa2Cu3O? by Solid State Reaction Method

Abstract

The aim of this research was synthesize YB_a2Cu₃O_? (YBCO) and to study the effect of Al₂O₃ additions at x= 0.00, 0.10, 0.20, 0.50, 1.50 and 3.50 wt.%. The samples were investigated through Thermogravimetric Analyzer (TGA) and X-Ray Diffraction (XRD). All samples prepared by solid state reaction method with calcination process at 900°C and sintering process at 950°C. The TGA analysis indicated weight loss was complete at 910°C. XRD patterns showed the orthorhombic structure with lattice parameters a=3.821 Å, b= 3.880 Å and c= 11.663 Å, respectively. The Al2O3 added samples did not show any new peak however the sharpness and broadening peaks was changed. The crystallite sizes of the samples were calculated from the width of the selected peak and half maximum. The size is slowly increased by increasing the Al₂O₃ addition. These result indicated that addition does not affect on the structure but the crystallite sizes increase affect the morphology images