PIEZOELECTRIC AND DIELECTRIC PROPERTIES OF CERAMICS IN THE SYSTEM POTASSIUM SODIUM NIOBATE
PIEZOELECTRIC AND DIELECTRIC PROPERTIES OF CERAMICS IN THE SYSTEM POTASSIUM SODIUM NIOBATE
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DOI：
10.1111/j.1151-2916.1959.tb12971.x
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发表时间：
1959-01-01
影响因子：
3.9
通讯作者：
DILLON, DM
中科院分区：
文献类型：
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作者：
EGERTON, L;DILLON, DM
对于具有高达50摩尔%的酒石酸钠添加至酒石酸钾的组合物，观察到高径向耦合系数。活性随着额外的碳酸钠含量而降低，并且超过约98摩尔%的添加量而消失。介电常数相对较低，根据成分的不同，从450到125不等。A-C损失很大，D. -C。电阻率为1012 ohm-cm。在系统的某些区域中获得的低介电常数和高耦合使得这些材料有希望用于固体超声延迟线，特别是在需要薄截面板的情况下，如高频厚度延伸或厚度剪切模式换能器。
High radial coupling coefficients are observed for compositions having up to 50 mole % sodium niobate additions to potassium niobate. The activity diminishes with additional sodium niobate content and disappears beyond about 98 mole % additions. Dielectric constants are relatively low, varying from 450 to 125, depending on composition. A.‐c. losses are high and d.‐c. resistivities are ∼1012ohm‐cm. The low dielectric constants and high coupling obtained in certain regions of the system make these materials promising for solid ultrasonic delay line use, especially where thin sectioned plates are required, as in high‐frequency thickness extensional or thickness shear mode transducers.