Fe^(3+)掺杂LaNiO_(3)钙钛矿陶瓷的制备及其吸波性能  

Preparation and microwave absorption properties of Fe^(3+)doped LaNiO_(3)perovskite ceramics

作　　者：于嫚 周影影 应楷睿 谢辉 YU Man;ZHOU Yingying;YING Kairui;XIE Hui(School of Materials Engineering,Xi’an Aeronautical Institute,Xi’an 710077,China)

机构地区：[1]西安航空学院材料工程学院,西安710077

出　　处：《航空材料学报》2023年第6期90-97,共8页Journal of Aeronautical Materials

基　　金：国家自然科学基金(21903062);陕西省科学技术协会青年人才托举计划项目(20220462);陕西省青年科技新星项目(2023KJXX-075)。

摘　　要：通过溶胶-凝胶法制备Fe^(3+)掺杂镍酸镧钙钛矿陶瓷,探究Fe^(3+)掺杂对其形貌、结构和吸波性能的影响。采用扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)分别对Fe^(3+)掺杂镍酸镧的微观形貌、元素分布和物相进行表征,使用矢量网络分析仪测定Fe^(3+)掺杂镍酸镧陶瓷的电磁参数并模拟吸波性能,研究Fe^(3+)掺杂量对镍酸镧钙钛矿陶瓷吸波性能的影响。结果表明:Fe^(3+)离子成功占据了Ni^(3+)离子的晶格位置,形成了钙钛矿结构型陶瓷;Fe^(3+)掺杂后对LaNiO_(3)陶瓷材料的颗粒形貌影响较小;Fe元素在LaNiO_(3)陶瓷材料中分布均匀无团聚;吸波性能最佳的Fe^(3+)掺杂量是0.05,其匹配厚度为1.40 mm,最大峰值可达–18.145 dB,低于–10 dB的频宽有1.42 GHz(9.38~10.8 GHz)。Fe^(3+)doped lanthanum nickelate perovskite ceramics were prepared by sol-gel method.Scanning electron microscope(SEM),energy dispersive spectrometer(EDS)and diffractometer(XRD)were used to characterize the micro morphology,element distribution and phase of Fe^(3+)doped lanthanum nickelate.The electromagnetic parameters of Fe^(3+)doped lanthanum nickel oxide ceramics were measured by using vector network analyzer,the absorption performance was simulated,and the influence of Fe^(3+)doping amount on the absorption mechanism of lanthanum nickel oxide perovskite ceramics was studied.The XRD results indicate that Fe^(3+)ions successfully occupy the lattice position of Ni^(3+)ions,forming perovskite structured ceramics.The SEM results indicate that Fe^(3+)doping has little effect on the particle morphology of LaNiO_(3)ceramic material,while the EDS results confirm that the distribution of Fe element in LaNiO_(3)ceramic material is uniform and non-agglomerated.In terms of absorption performance,the optimal doping amount of Fe^(3+)doped LaNiO_(3)ceramic material is 0.05,with a matching thickness of 1.40 mm and a maximum peak value of–18.145 dB.The frequency bandwidth below–10 dB is 1.42 GHz(9.38-10.8 GHz).

关 键 词：Fe^(3+)掺杂 溶胶-凝胶法 LaNi_(1-x)Fe_(x)O_(3)陶瓷 吸波性能 

分 类 号：TB34[一般工业技术—材料科学与工程]