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采用YBa2Cu3O7+δ(简称YBCO)多晶陶瓷超导粉末与硅橡胶(110型)按不同质量比进行配料,经过特殊的制备工艺,合成不同含量的超导YBCO/硅橡胶高分子复合材料,分别测量样品的压敏效应和介电特性。结果表明,在不同应力作用下,样品电阻值的变化范围在1~4个数量级。样品电阻值随测量温度的降低(300 50 K)呈下降趋势,测量温度降到90 K时,样品电阻值发生突变,但在9050 K没有观察到超导零电阻现象。室温下,样品的介电常数随频率的增加(1 kHz5 MHz)而减小,介电损耗随测量频率的增大先增大后减小。随着YBCO含量的增加,形成的超电容网络微观结构也就越多,样品的电阻逐渐减小电流加大,导致超电容中电解质的极化强度有所增加,两者共同作用的结果导致样品的介电常数、介电损耗均随着YBCO含量的增加而增大。
YBa2Cu3O7 + δ (referred to as YBCO) polycrystalline ceramic superconducting powder and silicone rubber (110 type) according to the different mass ratio of ingredients, through a special preparation process, the synthesis of different content of superconducting YBCO / silicone rubber polymer composites, respectively The pressure-sensitive effect and dielectric properties of the sample were measured. The results show that under different stress, the range of resistance value of samples varies from 1 to 4 orders of magnitude. The resistance of the sample decreases with decreasing temperature (300 50 K). When the measuring temperature drops to 90 K, the resistance of the sample changes suddenly, but no superconducting zero resistance is observed at 9050 K. At room temperature, the dielectric constant of the sample decreases with the increase of the frequency (1 kHz5 MHz), and the dielectric loss first increases and then decreases with the increase of the measurement frequency. With the increase of YBCO content, the more the supercapacitor network is formed, the more the microstructure of the supercapacitor network is formed, the smaller the resistance of the sample is and the larger the current is, resulting in an increase of the polarization of the electrolyte in the supercapacitor. As a result, The dielectric constant and dielectric loss increase with the increase of YBCO content.