| 摘要 |
The present invention aims to provide an application jig that can form a peripheral sealing material layer over the entire peripheral surface of a ceramic block. The application jig of the present invention includes a first principal surface; a second principal surface that is a principal surface on the opposite side of the first principal surface; and an opening section penetrating from the first principal surface to the second principal surface, wherein the opening section includes a first opening section on the first principal surface side and a second opening section on the second principal surface side, the first opening section has a diameter gradually decreasing from the first principal surface toward a boundary line between the first opening section and the second opening section, and the second opening section has a constant diameter from the boundary line toward the second principal surface. |
