| 摘要 |
PURPOSE:To grow high-quality single crystal excellent in crystallizability and uniformity of the composition by passing slowly a crucible holding the melt contained raw material through the inside of a furnance having temp. gradient while rotating the crucible acceleratedly and deceleratedly. CONSTITUTION:A crucible (made of platinium) 1 incorporated with raw material is decended through the inside of a furnace 2 in which the temp. gradient typically showed at the right side of the figure is formed with a heating heater and the raw material incorporated in the crucible 1 is competely melted to make melt 3 and the melt 3 is stitted and made uniform composition through rotating the crucible 1 acceleratedly and deceleratedly in the X direction shown by an arrow. Then, at the point of time at which the lower end of the crucible 1 is reached the point A being crystallizing temp., the melt 3 is cooled below the crystallizing temp. to grow single crystal 4. The decending of the crucible 1 is continued and it is slowly cooled to obtain rod-shaped high-quality single crystal 4. |
