钴酸钙薄膜的制备及高温吸波性能研究

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (8): 1518-1524.

钴酸钙薄膜的制备及高温吸波性能研究

高云飞¹, 许宝才², 高海涛³, 段荣霞⁴, 孟娜²

1.河北工业职业技术大学工业基础教学部,石家庄 050091;
2.河北工业职业技术大学材料工程系,石家庄 050091;
3.63850部队,白城 137001;
4.陆军工程大学石家庄校区车辆与电气工程系,石家庄 050003

收稿日期:2021-05-27 出版日期:2021-08-15 发布日期:2021-09-14
通讯作者: 许宝才,博士,教授。E-mail:xbcabcd@163.com
作者简介:高云飞(1980—),男,河北省人,讲师。E-mail:452011636@qq.com
基金资助:
军内科研项目(LJ20191C020400);河北工业职业技术大学博士基金

Preparation of Calcium Cobaltate Thin Films and High Temperature Wave-Absorbing Properties

GAO Yunfei¹, XU Baocai², GAO Haitao³, DUAN Rongxia⁴, MENG Na²

1. Department of Industrial Fundamentals, Hebei Vocational University of Industry and Technology, Shijiazhuang 050091, China;
2. Department of Materials Engineering, Hebei Vocational University of Industry and Technology, Shijiazhuang 050091, China;
3. Army 63850, Baicheng 137001, China;
4. Army Engineering University of PLA Shijiazhuang Campus, Shijiazhuang 050003, China

Received:2021-05-27 Online:2021-08-15 Published:2021-09-14

摘要/Abstract

摘要： 以溶胶凝胶法制备的钴酸钙粉体为基础材料,在氧化铝陶瓷基板上涂覆烧结形成了钴酸钙薄膜,研究了薄膜的物相结构、温阻特性及电磁波吸收性能。研究发现,溶胶凝胶法制备的钴酸钙粉体由Ca₉Co₁₂O₂₈相组成,粉体颗粒均匀,具有一定的取向性生长,呈明显的片层状结构。烧结后的钴酸钙薄膜由细小的Ca₃Co₄O₉相组成,与氧化铝基板结合紧密,厚度在20 μm左右,薄膜的方阻值随着温度的升高迅速下降,在300~800 ℃保持在20 Ω/□左右。800 ℃钴酸钙电阻膜型超材料吸波体在8~18 GHz显示出了对电磁波双吸收峰特征。

关键词: 钴酸钙薄膜, 溶胶凝胶法, 温阻特性, 电磁波, 高温吸波性能

Abstract: Calcium cobaltate thin films were prepared by coating and sintering on alumina ceramic substrate with calcium cobaltate powder prepared by sol-gel method. The phase structure, temperature resistance characteristics and wave-absorbing properties of the thin films were studied. It is found that the calcium cobaltate powders prepared by sol-gel method are composed of Ca₉Co₁₂O₂₈ phase, and the powder particles are uniform, with a certain orientation growth and obvious lamellar structure. The sintered calcium cobaltate film is composed of fine Ca₃Co₄O₉ phase, which is closely bound to the alumina substrate. The thickness is about 20 μm. The square resistance of the films decreases rapidly with the increase of temperature, and keep around 20 Ω/□ at 300 ℃ to 800 ℃. At 800 ℃, the resistance-film type metamaterial absorber exhibits double absorption peaks at 8 GHz to 18 GHz.

Key words: calcium cobaltate film, sol-gel method, temperature resistance characteristic, electromagnetic wave, high temperature absorbing property

中图分类号:

TB34

高云飞, 许宝才, 高海涛, 段荣霞, 孟娜. 钴酸钙薄膜的制备及高温吸波性能研究[J]. 人工晶体学报, 2021, 50(8): 1518-1524.

GAO Yunfei, XU Baocai, GAO Haitao, DUAN Rongxia, MENG Na. Preparation of Calcium Cobaltate Thin Films and High Temperature Wave-Absorbing Properties[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(8): 1518-1524.

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