Performance of PDC-SiBCN ceramic based wireless passive temperature sensor
Performance of PDC-SiBCN ceramic based wireless passive temperature sensor
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DOI：
10.11868/j.issn.1001-4381.2018.001319
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发表时间：
2020-01-20
影响因子：
0.4
通讯作者：
Han Bin
中科院分区：
文献类型：
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作者：
Yu Yu-Xi;Han Bin
采用耐高温聚合物衍生陶瓷（PDC-SiBCN）作为温敏介质材料，金属铂作为谐振腔材料，在陶瓷表面开槽形成共面天线，制成了集缝隙天线和谐振器于一体的无线无源温度传感器。该传感器可实现温度信息的无线无源传输。结果表明，传感器的谐振频率随测试温度的升高而单调下降，PDC-SiBCN陶瓷的介电常数随温度的升高而单调增加，热解温度为1000 ℃的传感器测试温度可达1100 ℃，具有优良的耐高温和介电温度特性。在相同的测试温度下，传感器的谐振频率随直径的增大而减小，随热解温度的升高而减小。通过对传感器的谐振频率-温度拟合曲线进行一阶偏导数得到灵敏度方程，该传感器在1100 ℃高温下具有较高的灵敏度。该传感器具有良好的循环稳定性，室温下实际无线传输距离为42 mm，测试温度为1100 ℃时传输距离可达8 mm，可用于高温恶劣环境下的航空发动机温度监测。
The high temperature resistant polymer derived ceramic (PDC-SiBCN) was used as a temperature sensitive dielectric material, and metal platinum was used as a resonant cavity material, and a coplanar antenna was formed by slotting on the surface of the ceramic to fabricate a wireless passive temperature sensor integrating the slot antenna and the resonator. The sensor can realize the wireless passive transmission of temperature information. The results show that the resonant frequency of the sensor is declined monotonically with the increase of the testing temperature, the dielectric constant of PDC-SiBCN ceramic is increased monotonously with increasing temperature, and the sensor with a pyrolysis temperature of 1000 degrees C is tested up to 1100 degrees C, which has excellent high temperature resistance and dielectric temperature properties. At the same test temperature, the resonant frequency of the sensor is decreased with increasing diameter and also is reduced with increasing pyrolysis temperature. The sensitivity equation is obtained by performing a first-order partial derivative of the resonant frequency-temperature fitting curve of the sensor, and the sensor has a high sensitivity at a high temperature of 1100 degrees C. The sensor has good cycle stability, and it has an actual wireless transmission distance of 42 mm at room temperature and a transmission distance of up to 8 mm when the testing temperature is 1100 degrees C, which can be used for temperature monitoring of aero-engine in high temperature and harsh environments.