| 摘要 |
PURPOSE:To increase high-temperature strength of a joining phase and simultaneously lower coefficient of thermal expansion and reduce thermal stress in the joining face by forming the subject joining agent from alpha-sialon, silicon nitride and mixed oxides. CONSTITUTION:The objective joining agent for silicon nitride ceramics is formed of a composition consisting of 5-80vol.% alpha-sialon Mx (Si, Al)12(O, N16) [M: rare earth element except La and Ce or Mg or Ca; X: 0.1 to 1] or a mixture of the silicon nitride with the alpha-sialon and a residual amount of mixed oxides. The mixed oxides consists of 20-55mol% oxide of an element of group II of the periodic table, 0.1-20mol% element of group IIIb, 0.1-20mol% oxide of a rare earth element including yttrium and 20-79.8mol% silicon dioxide. |
