| 摘要 |
PURPOSE:To roast a piezoelectric ceramics molded body without causing deterioration and mutual melt-sticking of the molded body by adding ZnO2 powder to powder having the same component as the piezoelectric ceramics molded body to form a green sheet and interposing either ZnO2 particles having large diameter due to calcination or the formed green sheets between the respective piezoelectric ceramics molded bodies in the case of laminating these molded bodies at a plurality of stages and roasting them. CONSTITUTION:Piezoelectric ceramics molded bodies 1 are laminated on an aluminum plate 3 spread on the bottom of a roasting vessel 2 and sealed by a cover 5 and introduced into a heating furnace and roasted at a high temp. of 1150-1200 deg.C. ZnO2 particles whose particle diameter is made large by calcining treatment or a green sheet 6 described hereunder are placed between the alumina plate 3 and the piezoelectic ceramics molded body 1 placed thereon. The green sheet 6 is formed by mixing ZnO2 powder with powder having the same component as the piezoelectric ceramics molded body. Further the coarse ZnO2 or the green sheets 6 are interposed between the laminated respective molded bodies 1. Thereby the piezoelectric ceramics molded bodies 1 are roasted with good yield without changing the composition thereof and melt-sticking the molded bodies with each other. |
