Yousaf Muhammad, Lu Yuzheng, Hu Enyi, Wang Baoyuan, Niaz Akhtar Majid, Noor Asma, Akbar Muhammad, Yousaf Shah M A K, Wang Faze, Zhu Bin
Energy Storage Joint Research Center, School of Energy and Environment, Southeast University, No.2 Si Pai Lou, Nanjing 210096, PR China.
School of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, PR China.
J Colloid Interface Sci. 2022 Feb 15;608(Pt 2):1868-1881. doi: 10.1016/j.jcis.2021.09.182. Epub 2021 Oct 1.
Tunable microwave absorption characteristics are highly desirable for industrial applications such as antenna, absorber, and biomedical diagnostics. Here, we report BiNdCrFeO (x = 0, 0.05, 0.10, 0.15) nanoparticles (NPs) with electromagnetic matching, which exhibit tunable magneto-optical and feasible microwave absorption characteristics for microwave absorber applications. The experimental results and theoretical calculations demonstrate the original bismuth ferrite (BFO) crystal structure, while Nd and Cr injection in the BFO structure may cause to minimize dielectric losses and enhance magnetization by producing interfacial defects in the spinel structure. Nd and Cr co-doping plays a key role in ordering the BFO crystal structure, resulting in improved microwave absorption characteristics. The BiNdCrFeO (BNCF2) sample exhibits a remarkable reflection loss (RL) of -37.7 dB with a 3-mm thickness in the 10.15 GHz-10.30 GHz frequency region. Therefore, Nd and Cr doping in BFO nanoparticles opens a new pathway to construct highly efficient BFO-based materials for tunable frequency, stealth, and microwave absorber applications.
可调谐微波吸收特性对于天线、吸收器和生物医学诊断等工业应用非常理想。在此，我们报道了具有电磁匹配的BiNdCrFeO（x = 0、0.05、0.10、0.15）纳米颗粒（NPs），其表现出可调谐的磁光特性和适用于微波吸收器应用的可行微波吸收特性。实验结果和理论计算表明了原始的铋铁氧体（BFO）晶体结构，而在BFO结构中注入Nd和Cr可能会通过在尖晶石结构中产生界面缺陷来使介电损耗最小化并增强磁化强度。Nd和Cr共掺杂在BFO晶体结构有序化中起关键作用，从而改善了微波吸收特性。BiNdCrFeO（BNCF2）样品在10.15 GHz - 10.30 GHz频率范围内，厚度为3 mm时表现出-37.7 dB的显著反射损耗（RL）。因此，在BFO纳米颗粒中掺杂Nd和Cr为构建用于可调谐频率、隐身和微波吸收器应用的高效BFO基材料开辟了一条新途径。
