Experiment and Calculation of Output Current of Ferroelectric Ceramics in Parallel Connection Loaded by Shock Waves
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摘要: 为分析不同数量铁电体的输出电流特征，进行了多片并联PZT95/5铁电体冲击去极化实验，测量了电阻负载下铁电体的输出电流；建立了并联铁电体输出电流的计算模型，计算了并联铁电体的输出电流。通过比较计算和实验结果，分析了铁电体数量和冲击波状态对铁电体输出电流的影响。结果表明：若进入铁电体的冲击波为平面波，铁电体输出电流的波形接近方波，电流峰值随铁电体并联数量的增加成比例增加，冲击波波形和侧向稀疏波对铁电体输出电流波形和去极化率有很大的影响。Abstract: To analyze the characters of out current of different number ferroelectric ceramics, the tests of PZT95/5 ferroelectric ceramics in parallel connection loaded by the shock waves were carried out. The output currents of ferroelectric ceramics for the resistance loads were measured. A model calculating the output current of ferroelectric blocks in parallel connection was developed. The currents under different number of ferroelectric blocks were calculated numerically with this model. By comparing the calculated results and experimental results, the effects of the number of ferroelectric and shock wave on output of current were analyzed. The results indicated that if the planar shock waves load the ferroelectric blocks, the shape of the output current will be quadrate and the current will increase along with the number of the ferroelectric blocks increasing. The shape of shock waves and the sparse waves influence on the output current and the depolarization ratio.
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Key words:
- ferroelectric ceramic /
- shock waves /
- depolarization
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