| 摘要 |
<p>A method for producing anαalumina sintered body for the production of a sapphire single crystal characterized in that a relative density is 60% or more, a closed porosity is 10% or less, a purity is 99.99% by mass or more, each content of Si, Na, Ca, Fe, Cu and Mg is 10 ppm or less, and a volume is 1 cm3 or more, and theαalumina sintered body can be obtained by mixing 100 parts by weight of anαalumina with 1 part by weight or more and 20 parts by weight or less of anαalumina precursor to obtain a mixture, forming a compact from the obtained mixture, and firing the obtained compact.</p> |
