| 摘要 |
<p>The invention provides a magnesium oxide powder which has large crystallite diameters and excellent crystallinity. A magnesium oxide powder which exhibits half widths of peaks of (111), (200) and (220) planes of 0.20 degree or below respectively in the powder X-ray diffractometry with Cu-KE radiation and has crystallite diameters of 700Åor above.</p> |
