超音波噴霧熱分解法により合成した酸化物超伝導微粒体の特性

概要

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Supercondective oxide fine powders were prepared by spray pyrolysis using an ultrasinic atomizer.The as-prepared particles had spherical shape in submicron order with narrow size distribution.Fluorescence X-ray analysis and EDS analysis showed that the powder composition was in good agreement with the starting solution composition.Experimental factors (concentration,pyrolysis temperature and flow rate) influenced the powder characteristics such as particle size and crystal structure.The particle size distribution and particle morphology were independent of the experimental factors.T_c of YBa_2Cu_3O_<7-X> ceramics was 92K,while those of Bi_2Sr_2CaCu_2O_X and Bi_2Sr_2Ca_2Cu_3O_X ceramics were 86K and 110K,respectively.The addition of PbO modified the superconducting properties,and T_c of the ceramics was higher than that without PbO.T_c of PbO doped Bi_2Sr_2Ca_2Cu_3O_X ceramics was apprciably dependent on the sintering conditions.
社団法人日本材料学会の論文
1993-11-15