摘要 |
<P>PROBLEM TO BE SOLVED: To prepare a powdery granule suitable for molding with a metallic mold. <P>SOLUTION: In this forsterite raw material composition using magnesia as a main raw material, the magnesia contains ≤0.05 wt.% B<SB>2</SB>O<SB>3</SB>. <P>COPYRIGHT: (C)2005,JPO&NCIPI |