轻骨料水泥基多功能吸波材料的制备及有限元分析

doi:10.11896/cldb.23080253

材料导报

2024, Vol. 38

Issue (5): 23080253-7 https://doi.org/10.11896/cldb.23080253

特种工程材料

轻骨料水泥基多功能吸波材料的制备及有限元分析

吴子豪^1,2, 苏荣华³, 马超¹, 解帅¹, 冀志江^1,2,*, 王英翔¹, 王静¹

1 中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京 100024
2 武汉理工大学材料科学与工程学院,武汉 430070
3 军事科学院国防工程研究院,北京 100850

Preparation and Finite Element Analysis of Lightweight Aggregate Cement-based Multi-function Absorbing Materials

WU Zihao^1,2, SU Ronghua³, MA Chao¹, XIE Shuai¹, JI Zhijiang^1,2,*, WANG Yingxiang¹, WANG Jing¹

1 State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China
2 School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
3 Defense Engineering Institute, AMS, Beijing 100850, China

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摘要为分析轻骨料种类及粒径对吸波材料性能的影响,采用五种从微米级至毫米级粒径的轻骨料制备了轻质水泥基吸波材料,测试其电磁参数和反射损耗(RL),采用有限元分析方法构建了二维截面模型,模拟吸波材料内部电磁场分布情况,并测试了吸波材料的力学性能和导热系数。结果表明,增加轻骨料掺量和增大粒径可改善水泥基材料的阻抗匹配性能,提升平均RL,拓宽有效吸波频宽,吸收峰向高频移动。20 mm厚度时,吸波材料在低频1.2 GHz处最优RL为-29.1 dB,在较高频5.9 GHz处最优RL为-20.9 dB,有效吸波频宽最宽可达14.49 GHz。有限元模拟结果表明,轻骨料可改变电磁波传输方向,增加电磁波损耗途径,相邻骨料之间可产生较强损耗,其次是在骨料内部产生损耗,这为骨料种类、粒径选择与轻质吸波材料设计提供理论基础。增大轻骨料粒径会降低吸波材料的密度、力学强度与导热系数,使其吸波效能更好,保温效果更优。

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	吴子豪
	苏荣华
	马超
	解帅
	冀志江
	王英翔
	王静

关键词: 骨料粒径吸波材料反射损耗有限元分析力学性能导热系数

Abstract: In order to analyze the effects of lightweight aggregate type and particle size on the properties of wave absorbing materials, five kinds of lightweight aggregate with particle sizes ranging from micron to millimeter were used to prepare lightweight cement-based absorbing materials, and their electromagnetic parameters and reflection loss (RL) were tested. 2D cross-section model was constructed by finite element analysis method to simulate the electromagnetic field distribution inside the wave absorbing materials. The mechanical properties and thermal conductivity of the wave absorbing materials were tested. The results show that the impedance matching performance of cement-based materials and the average RL are improved via increasing the content of lightweight aggregate and particle size, as well as broaden the effective absorption bandwidth, and the absorption peak is moved to high frequency. When the thickness is 20 mm, the optimal RL of the wave absorbing material is -29.1 dB at the low frequency of 1.2 GHz and -20.9 dB at the high frequency of 5.9 GHz, and the maximum effective absorbing bandwidth can reach 14.49 GHz. The finite element simulation results show that the electromagnetic wave transmission direction can be changed by adding lightweight aggregate, the electromagnetic wave loss path is increased, and a strong loss is produced between neighboring aggregates, then the loss occurs inside aggregate, which provides a theoretical basis for the selection of aggregate type, particle size and the design of lightweight absor-bing materials. The density, mechanical strength and thermal conductivity of wave absorbing materials are reduced via increasing the particle size of lightweight aggregate, the wave absorption efficiency and the heat preservation effect are better.

Key words: aggregate size absorbing materials reflection loss finite element analysis mechanical property thermal conductivity

出版日期: 2024-03-10 发布日期: 2024-03-18

ZTFLH:

TB34

基金资助: 绿色建筑材料国家重点实验室探索项目(ZA-79)

通讯作者: *冀志江,工学博士,教授级高级工程师,博士研究生导师,享受国务院政府特殊津贴专家。中国建筑材料科学研究总院绿色建筑材料国家重点实验室学术带头人。兼任中国建筑材料联合会生态环境建材分会副理事长,中国硅酸盐学会房建材料分会秘书长,建材行业环境友好与有益健康建筑材料标准化技术委员会主任委员,中国复合材料学会矿物复合材料专业委员会副主任委员,复旦大学、河北工业大学兼职导师等职。自2000年至今,主要致力于环境功能建材及其评价技术研究,开拓并发展环境功能建材新兴行业和生态环境建材新学科方向。承担国家自然科学基金、国家重点研发计划、国家科技支撑计划、863计划等各类科研课题20余项,获国家技术发明二等奖1项,获授权专利60余项,主持制定国家及行业标准50余部,发表学术论文160余篇,其中SCI/EI收录50余篇,出版专著5部。 jzj1618@126.com

作者简介: 吴子豪,2018年6月、2021年7月分别于青岛科技大学和中国建筑材料科学研究总院获得工学学士学位和硕士学位。现为武汉理工大学材料科学与工程学院博士研究生,在冀志江教授的指导下进行研究。目前主要研究领域为电磁波防护材料。

引用本文:

吴子豪, 苏荣华, 马超, 解帅, 冀志江, 王英翔, 王静. 轻骨料水泥基多功能吸波材料的制备及有限元分析[J]. 材料导报, 2024, 38(5): 23080253-7.
WU Zihao, SU Ronghua, MA Chao, XIE Shuai, JI Zhijiang, WANG Yingxiang, WANG Jing. Preparation and Finite Element Analysis of Lightweight Aggregate Cement-based Multi-function Absorbing Materials. Materials Reports, 2024, 38(5): 23080253-7.

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https://www.mater-rep.com/CN/10.11896/cldb.23080253 或 https://www.mater-rep.com/CN/Y2024/V38/I5/23080253

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