Electrical, magnetic and mechanical properties of superconductors are very important due to their growing uses in industry. Intergranular weak links and weak flux pinning in ceramic superconductors made them to have low critical current density. So the study of these materials turned to a significant search field. Using microwave in materials preparation process can reduce time and costs; even after preparation, samples that get affected by radiation, their properties will be changed. In this thesis, the effect of microwave radiation on properties of Bi 1/85 Pb 0/35 Sr 1/95 Ca 2 Cu 3/05 O 10+x superconductor, during preparation and after sintering have been investigated. Samples named M, H, C and S were sintered in 170 hours under temperature 840 ° C. The starting materials were nitrates for both H and M. The sample H was prepared by sol-gel auto-combustion method. Sample M was prepared by sol-gel method with using microwave radiation. Sample C was prepared like M; but with the difference that starting materials were oxides and carbonates. The last sample was prepared by solid state method and was exposed to radiation after sintering. The result of XRD, SEM analyses, Ac susceptibility and electrical resistivity show by applying microwave radiation during combustion in sol-gel method preparation and after making samples can influence on structure of sample. Due to this radiation, magnetic and traort properties of samples would be changed. This means that for sample M intergranular weak links and pinning and thus critical current density are better than sample H. It also has observed that the use of oxides and carbonates instead of nitrates as starting material, for samples that prepared by sol-gel method and microwave, can influence on superconductor properties. This means that superconductor properties of sample C were weaker than sample M. if superconductor made by solid state method, affected by microwave radiation, the structural, electrical and magnetic properties of its properties change and intergranular weak links and pinning will be reduced.
