| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a highly heat-conductive silicon nitride sintered compact having high thermal conductivity and strength, with which the silicon nitride is obtained without sintering at high temp. and high pressure in a nitrogen atmosphere. SOLUTION: The silicon nitride is produced by adding, as sintering aids, magnesium(Mg) and elements (RE) of group 3a of the Periodic Table in a total amount of 0.5 to 5.0 vol.% expressed in terms of magnesium oxide (MgO) and each oxide (RExOy) to a silicon nitride powder containing 0 to 2.0 wt.% oxygen, then forming and sintering the formed body in a nitrogen atmosphere or an inert atmosphere at 1,750 to 1,950 deg.C. |
