| 摘要 |
PURPOSE:To prevent piezoelectric ceramic sintered compacts from warping and deforming by arranging piezoelectric ceramic compacts between a pair of holding plates oppositely through specific spacers and burning the aforementioned compacts. CONSTITUTION:A pair of holding plates 3 are oppositely arranged through pair of spacers 2, having a thickness equal to or larger than that of piezoelectric ceramic compacts 1 before burning and providing a thickness equal to or smaller than that of the compacts 1 after the burning with a lower shrinking rate than that of the compacts 1 and the compact 1 is placed in the gap between the holding plates 3. The resultant sandwich is then arranged in a sheath and heated to reduce the thickness of the spacers 2 from that of the compacts 1 and a load of the holding plates 3 is applied to carry out the burning. |
