| 摘要 |
A droplet ejection head provided with a piezoelectric actuator made by using a KNbO 3 -NabO 3 piezoelectric porcelain composition which exhibits a larger piezoelectric constant than those of conventional ones and does not have any secondary phase transition point in the neighborhood of room temperature (from 10 to 40°C) and which is suitable for use in the piezoelectric actuator of a droplet ejection head, that is, a droplet ejection head characterized by being provided with a piezoelectric actuator made by using a piezoelectric porcelain composition represented by the general formula: (1-y-z-w)(K x Na 1-x )NbO 3 + yLiNbO 3 + zSrTiO 3 + wBiFeO 3 , wherein (K x Na 1-x )NbO 3 represents potassium sodium niobate; LiNbO 3 represents lithium niobate; SrTiO 3 represents strontium titanate; and RifeO 3 represents bismuth ferrate; with the proviso that 0.4 < x <0.6, 0 < y ‰¤ 0.1, 0 < z < 0.1, 0 < w < 0.09, and 0.03<y+z+w‰¤0.12. |
