| 摘要 |
PURPOSE:To enable efficient production of continuous, thins plate free from sintering defects by sintering a formed powder of piezo ceramic under the optimal load. CONSTITUTION:A placing powder 2 of zirconia is sprayed on the placing plate 1 of zirconia or the like and a formed powder of piezo ceramic 3 such as lead titanate-lead zirconate-lead nickelniobate is placed thereon. Further, the placing powder 4 is sprayed thereon and the placing plate 5 is stacked thereon. In this case, the weight of the placing plate 5 is set in the range from half to double of the weight of the formed powder 3. When the weight is lack with the plate, the stacking plate 6 is increased. Then, they are placed on the alumina bed 8, covered with the alumina lid 9 to close tightly and sintered. Thus, a sintered product of a continuous, thin plate of piezo ceramic is obtained by a single-stage sintering operation with reduced defects such as warpage or deformation. Further, abrasing process is simplified and the production yield is improved. |
