Nd掺杂BaTiO_3/CNTs复合吸波材料的制备与表征

Preparation and Characterization of Nd Doped BaTiO_3/ CNTs Composite Absorbing Materials

采用水热法制备了稀土元素钕掺杂的钛酸钡与碳纳米管（CNTs）的复合吸波材料。利用红外光谱（IR）、X-射线衍射仪（XRD）及能谱仪（EDS）测试了样品的结构与成分,并采用透射电子显微镜（TEM）对样品的形貌进行了表征。考察了Nd掺杂及不同的CNTs复合量对复合材料在低频区（0-6 000 MHz）吸波性能的影响。结果表明,Nd掺杂后钛酸钡的吸波性能得到一定的提升,随着CNTs复合量的增加,吸收峰的位置先向低频移动后又移向高频。当CNTs含量为7%时,复合材料在频率为4 270.8 MHz处出现了-13.5 d B的最强吸收峰,〈-5 d B的频宽达520.8 MHz。

Rare earth elements Nd doped Ba Ti O3 and carbon nanotubes（ CNTs） composite absorbing materials were prepared via the hydrothermal method. The structure and composition of samples were measured by infrared spectroscopy（ IR）,X-ray diffraction（ XRD） and energy dispersive spectrometer（ EDS）,and the morphology was determined by transmission electron microscope（ TEM）. The influence of the content of CNTs and Nd dopant on the microwave absorbing properties of composite materials at low frequency region（ 0 - 6 000 MHz） was investigated. The results showed that Nd doped Ba Ti O3 have a better microwave absorbing performance than pure Ba Ti O3. With the increase of the content of CNTs,the frequency of absorption peak moved to low frequency then to high. When the content of CNTs was 7%,the composites had the maximum wave absorption（- 13. 5 d B） at the frequency of 4 270. 8 MHz with a peak width of 520. 8 MHz（ - 5 d B）.