PRODUCTION OF BAPBO3 BASED OXIDE SUPERCONDUCTOR SINGLE CRYSTAL BY SOLUTION PULLING UP METHOD

摘要

PURPOSE:To obtain a large-sized single crystal having a sufficient thickness, by depositing a BaPbO3 based microcrystal while decreasing the temperature of a mixed melt of PbO, BaCO3 and BaCl2 as a main raw material and growing the microcrystal on a seed crystal. CONSTITUTION:PbO is mixed with BaCO3 and BaCl2 at a desired ratio. BiO2 is further mixed therewith as necessary. A melt of the resultant mixture is prepared and as a starting material 7 put into a crucible 8 and melted by induction heating with a high-frequency heating coil 4. A single crystal 6 which is seed crystal of BaPb1-xBixO3 and mounted on the tip of a platinum shaft 2 is brought into contact with the melt surface. When the melt temperature is slowly decreased, a microcrystal of BaPb1-xBixO3 is deposited by portions in the interface of the melt on contact with the single crystal 6 and grown on the single crystal 6. The grown single crystal is then pulled up from the melt while rotating the single crystal.