HYBRIDIZATION PROCESSES BY THE THERMAL PLASMA AND THE AEROSOL METHOD

摘要

Hybridized ceramic powders have advantages for functional materials in powder form and they are also effective raw materials to fabricate functional composite. Evaporation -condensation processes offer various possibilities of microstructural hybridization for multi-component ceramics. This paper discusses hybridization processes for superconducting ceramics preparation through vapor phases. Hybridized powders and films composed of nano-scale Ba_2YCu_3O_(7-y) superconductor with Ag, MgO and also with Au and Bi-superconductor particles were successfully prepared by using of the thermal plasma method and the aerosol method, respectively. Superconducting properties of the resulting sintered bodies with the hybridized powders were significantly improved by the microstructure control such as introduction of pinning centers and improvement of weak linkage at each grain boundaries.