| 摘要 |
PROBLEM TO BE SOLVED: To produce an aluminum nitride-based sintered compact having a high fracture strength and a high fracture toughness. SOLUTION: This aluminum nitride-based sintered compact consists essentially of aluminum nitride and contains at least one or more kinds selected from group 3a oxides of the periodic table and at least one or more kinds selected from group 2a oxides and carbonates in the total amount of 0.1-30 wt.% and further 0.1-20 wt.% of at least one or more kinds selected from nitrides, carbides, silicides and borides of Si, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W. The sintered compact is composed by regulating the average defect size to be a fracture source to <=1 μm. |
