| 摘要 |
<p>A silicon nitride sintered body comprising 3.5% by weight or less of aluminum, 3.5% by weight or less of oxygen and the balance of silicon nitride; and a silicon nitride sintered body comprising 90% by weight or more of silicon nitride, 3.5% by weight or less of aluminum, 3.5% by weight or less of oxygen and from 0.01 to 10% by weight of at least one metallic element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Nd, and Ho. These sintered bodies have a density of 3.15 g/cm<3> or more and a thermal conductivity of 40 W/mK or more.</p> |
