| 摘要 |
PURPOSE:To obtain a single crystal having uniform compsn. over its whole length of crystal growth by replenishing continuously raw materials for the solid crystal having different compsn. from the foot of the single crystal to a coagulating grown single crystal by heating a crucible filled with a seed crystal and raw material for the solid crystal. CONSTITUTION:A crucible filled with a seed crystal and materials for a solid crystal is heated while changing continuously the relative position of the crucible to a heating device. A single crystal having a long size and uniform compsn. is obtd. by replenishing the material having different compsn. to the initially filled material continuously to a single crystal coagulated from the melt in the crucible. For example, by 0-5mol% Fe2O3 is reduced and by 0-5mol% MnO2 is increased, and by 0-5mol% ZnO is reduced preferably in a compsn. for the material for solid crystal to be replenished from the compsn. of the filled material for the solid crystal in the prepn. of an Mn-Zn ferrite single crystal. |
