THE EFFECT OF ADDING A Pb NANOPARTICLE WITH A PERCENTAGE OF 0.5 OF BI AND AN ADDITION OFF SR,TI NANOPARTICLES OF 0.1,0.3,0.5 OF BA ON THE STRUCTURAL, ELECTRICAL AND MAGNETIC PROPERTIES OF THE SUPERCONDUCTING COMPOUND (Bi₂Ba₂Ca₂Cu₃O₁₀₊δ) AT HIGH TEMPERATURES
Four samples of the compound (Bi₂Ba₂Ca₂Cu₃O₁₀₊δ) were prepared by solid-state reaction method, using annealing method, at a temperature of 800 ℃ and under hydraulic pressure of 8 tan/cm² by partial substitution of the nanoparticle lead by 0.5 from bismuth, strontium and titanium nanoparticles at a ratio of (0.1,0.3,0.5) of the element barium Ba of the compound. Electrical tests showed an increase in the value of the critical temperature Tc when compensation the material with a value of X = 0.5 for the Pb nanoparticle values of Bi and y = 0.1 compensation for the values of Sr,Ti, and from the element Ba, where the critical temperature Tc reached a value of 144.5 k and When compensation the substance with a value of x = 0.5 for the values of pb nanoparticle from the element Bi and y = 0.3 for the values of Sr,Ti from the element Ba, the highest increase in the value of the critical temperature Tc was 152.2 k, but it decreased when compensation the substance with x = 0.5 for the values of the Pb nanoparticle From the Bi element and y = 0.5 compensation for the values of Sr,Ti, from the Ba element to k 145.5. The structural properties of the X-ray diffraction of the models showed the presence of a certain phase in the three values with varying differences in the dimensions of the network a, b, c with a clear increase in the dimension c. When examining the samples with a fesem device with a magnification rate of 500kx ---100.00kx, it was found that the average particle size of the best samples was 38.28 nm at the sample X=0.5 and y=0.5. The images of the four models show very high-resolution images and are very detailed, and it appears that light structures belong to the light elements and dark areas belong to the heavy elements. The study under consideration showed the magnetic properties through the hysteresis curve of the samples and the relationship between the saturation magnetism Ms and the remanence magnetization Mr and the coercive force Hc that the hysteresis rings formed in the superconducting samples are narrow and there is an inverse relationship between the tightness of the rings and the improvement of the critical temperature Tc.
Keywords: Pb Nanoparticle, COMPOUND (Bi₂Ba₂Ca₂Cu₃O₁₀₊δ).