Li_1.3Al_0.3Ti_1.7（PO₄）₃陶瓷在X波段的周期结构设计及吸波性能优化

Periodic structure design and optimization of microwave absorption properties for Li_1.3Al_0.3Ti_1.7(PO₄)₃ ceramics in the X-band

摘要

隐身技术的快速发展对吸波材料提出轻质、宽频、高温的使用需求。选择Li_1.3Al_0.3Ti_1.7（PO₄）₃（LATP）陶瓷作为轻质高温吸波材料，在其表面设计周期结构拓展其吸收带宽。采用高温固相法烧结LATP陶瓷，采用HFSS软件在其表面进行周期结构设计，研究不同形状贴片的几何参数和周期参数对吸波性能的影响，并采用遗传算法进行周期结构优化。结果表明：周期结构贴片附近能够产生强烈的电磁谐振，有效改善LATP陶瓷的吸收带宽。相较于无周期结构的LATP陶瓷，二次优化后的矩回形贴片可将反射损耗（RL）低于−10 dB的吸收带宽从2.69 GHz拓展至整个X波段，并且将RL<−15 dB的吸收带宽从0 GHz提高至3.82 GHz，同时还可以降低最小反射损耗和陶瓷厚度。

Abstract

The rapid development of stealth technology has put forward the demand for lightweight，broadband and high temperature microwave absorption materials. Li_1.3Al_0.3Ti_1.7(PO₄)₃ (LATP) ceramics are selected as lightweight and high temperature microwave absorption materials，and periodic structure is designed on its surface to expand its absorption bandwidth. LATP ceramics are sintered by the high temperature solid state method. The HFSS software is used to design the periodic structure on its surface. The effects of the geometric parameters and periodic parameters of patches with different shapes on their microwave absorption properties are studied，and the genetic algorithm is adopted to optimize the periodic structure. Results show that strong electromagnetic resonance occurs near the patches of the periodic structure，effectively improving the absorption bandwidth of LATP ceramics. Compared with LATP ceramics without periodic structure，the secondary optimized rectangle ring patch can expand the absorption bandwidth with RL <−10 dB from 2.69 GHz to the entire X band. Moreover，it can increase the absorption bandwidth with RL <−15 dB from 0 GHz to 3.82 GHz. At the same time，it can also reduce the minimum reflectivity and the thickness of the ceramic.

关键词

LATP陶瓷 / 周期结构 / 吸波性能 / 吸收带宽

Key words

LATP ceramics / periodic structure / microwave absorption property / absorption bandwidth

参考文献

[1] 阮心怡，张恒宇，王妮，等. 周期结构电磁超材料吸波体的设计及最新进展[J].材料导报，2024，38（3）：31-41.

[2] RUAN X Y，ZHANG H Y，WANG N，et al. Design and recent progress of periodically structured electromagnetic metamaterial absorbers[J].Materials Reports，2024，38（3）：31-41.

[3] 张娜，华伟，潘靖凯，等. 内嵌金属周期结构的宽频复合吸波材料[J].高分子材料科学与工程，2020，36（9）：124-129.

[4] ZHANG N，HUA W，PAN J K，et al. Broadband composite absorbing materials with embedded metal periodic structure[J].Polymer Materials Science & Engineering，2020，36（9）：124-129.

[5] 高基磊，刘俐. 耐高温吸波陶瓷及其涂层的研究进展[J].材料工程，2024，52（4）：24-33.

[6] GAO J L，LIU L. Research progress in high temperature microwave absorbing ceramics and coatings[J].Journal of Materials Engineering，2024，52（4）：24-33.

[7] GUO Y D，ZHAO E Q，LI J M. Superior ionic conductivity of W—doped NASICON—type Li_1.3Al_0.3Ti_1.7（PO₄）₃ solid electrolyte[J].Journal of the European Ceramic Society，2024，44（12）：7081-7091.

[8] CHEN D，LIU Y Z，LUO F，et al. NASICON—type Li_1.3Al_0.3Ti_1.7（PO₄）₃ ceramics with frequency dispersion effect and microwave absorption properties in 8.2—12.4 GHz[J].Journal of Materials Science：Materials in Electronics，2020，31（16）：13724-13729.

[9] CHEN D，ZHOU Y Y，XIE H，et al. Microwave absorption properties of Ti₃SiC₂/Na₃Zr₂Si₂PO₁₂ composites fabricated by plasma spraying and vacuum sintering in the X—band[J].Journal of Materials Science：Materials in Electronics，2021，32（14）：19958-19965.

[10] CHEN D，YANG J L，ZHOU Y Y，et al. Divalent—doped Li_1.3Al_0.3Ti_1.7（PO₄）₃ ceramics with enhanced microwave absorption properties in the X—band[J].Journal of Electronic Materials，2022，51（5）：2663-2672.

[11] 陈丹，周影影，杨鑫，等. Co²⁺离子掺杂含量对Li_1.3+x Al_0.3−x Co _x Ti_1.7（PO₄）₃陶瓷导电和吸波性能的影响[J].航空材料学报，2022，42（6）：81-87.

[12] CHEN D，ZHOU Y Y，YANG X，et al. Effects of Co²⁺ ion doping content on conductivities and microwave absorption properties of Li_1.3+x Al_0.3−x Co _x Ti_1.7（PO₄）₃ ceramics[J].Journal of Aeronautical Materials，2022，42（6）：81-87.

[13] KEYKAVOUS—AMAND S，PEYMANFAR R. Fabrication of clay soil/CuFe₂O₄ nanocomposite toward improving energy and shielding efficiency of buildings[J].Scientific Reports，2021，11：20832.

[14] PEYMANFAR R，ERSHAD Z S，SELSELEH—ZAKERIN E，et al. Graphite—like carbon nitride（g—C₃N₄）：a promising microwave absorber[J].Ceramics International，2022，48（12）：16461-16476.

[15] HOU Z X，XUE J M，LIU Y Q，et al. Bidirectional periodic pore structure Si—C—N multiphase ceramic with high thermostability and excellent microwave absorption properties over a wide temperature range[J].Journal of the European Ceramic Society，2024，44（2）：850-857.

[16] YU S W，GUO J，ZHANG G J，et al. Improved broadband design of SiC/MWCNT absorbing materials through synergistic regulation of heterointerface structure and triple periodic minimal surface meta—structure[J].Carbon，2024，226：119181.

[17] LU J B，SHENG M M，GONG H Y，et al. Lightweight，ultra—broadband SiOC—based triply periodic minimal surface meta—structures for electromagnetic absorption[J].Chemical Engineering Journal，2024，488：151056.

[18] SUJATHA M N，KADIYA V. A subcell based approach for enhancing the absorption bandwidth of microwave absorbers using printed periodic metallic geometries[J].Engineering Science and Technology，an International Journal，2019，22（1）：385-390.

[19] YANG Z N，LUO F，ZHOU W C，et al. Design of a thin and broadband microwave absorber using double layer frequency selective surface[J].Journal of Alloys and Compounds，2017，699：534-539.

[20] CHOI W H，KWAK B S，KWEON J H，et al. Microwave absorbing structure using periodic pattern coated fabric[J].Composite Structures，2020，238：111953.

[21] YE X L，XU J Q，LI S，et al. The microwave absorption properties variation with temperature of RF/SiO₂ and improved microwave absorption by periodic structure[J].Journal of Alloys and Compounds，2023，968：171905.

[22] YANG F，XUE J M，WANG C X，et al. In—situ construction of carbon fiber gradient periodic structure in Al₂O_3f/SiOC composites for ultra—broadband and high—temperature electromagnetic wave absorption[J].Journal of Materials Science & Technology，2024，194：87-97.

[23] XIE S，JI Z J，MA C，et al. Three—dimensional hexagonal periodic structured absorber for broadband electromagnetic wave absorption[J].Journal of Materials Science：Materials in Electronics，2022，33（6）：3115-3128.

[24] 张悦. 基于遗传算法的三明治蜂窝结构吸波材料优化设计[D]. 武汉：华中科技大学，2022.

[25] ZHANG Y. Optimization design of sandwich honeycomb absorbing material based on genetic algorithm[D]. Wuhan：Huazhong University of Science and Technology，2022.

[26] 王俊鸣，朱志军，章志敏. 基于遗传算法的多层吸波材料优化设计[J].现代雷达，2013，35（11）：66-70.

[27] WANG J M，ZHU Z J，ZHANG Z M. Design and optimization software of multilayer absorbers based on genetic algorithm[J].Modern Radar，2013，35（11）：66-70.

[28] 庞永强. 电磁吸波超材料理论与设计研究[D]. 长沙：国防科学技术大学，2015.

[29] PANG Y Q. The theory and design of metamaterial absorbers[D]. Changsha：National University of Defense Technology，2015.

[30] YANG F，DONG Y P，WANG Y Q，et al. Carbon nanowire modified Nextel 610/SiOC composites with gradient periodic structure for enhanced broadband electromagnetic—wave absorption performance at elevated temperatures[J].Journal of Alloys and Compounds，2025，1012：178527.

基金资助

陕西省创新能力支撑计划科技创新团队项目(2025RS-CXTD-027)