| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an α-alumina sintered body for the production of a sapphire single crystal which enables to produce a sapphire single crystal with high production efficiency, and a method for producing the same. <P>SOLUTION: There is disclosed a method for producing an α-alumina sintered body for the production of a sapphire single crystal characterized in that the relative density is ≥60%, the closed porosity is ≤10%, the purity is ≥99.99 mass%, each content of Si, Na, Ca, Fe, Cu and Mg is ≤10 ppm, and the volume is ≥1 cm<SP POS="POST">3</SP>. The α-alumina sintered body is obtained by mixing 100 pts.wt. of an α-alumina with 1-20 pts.wt. of an α-alumina precursor to obtain a mixture, forming a compact from the obtained mixture, and firing the obtained compact. <P>COPYRIGHT: (C)2012,JPO&INPIT |
