Mechanically robust Al2O3 f/LaPO4/Al2O3 composite for high-performance microwave transparent

被引：0

作者：

Jing, Linhan ^{[1
]}

Luo, Fa ^{[1
]}

Xu, Hailong ^{[1
]}

Wang, Chunhai ^{[1
]}

Pan, Haijun ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Shannxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1010卷

基金：

中国国家自然科学基金;

关键词：

Al2O3 (f)/Al2O3 composite; Sol-gel method; The process of closed pores formation; Wave-transparent composite; WAVE-TRANSPARENT; MICROSTRUCTURE; FIBER; SIO2F/SIO2; MONAZITE; BEHAVIOR; ALUMINA;

D O I：

10.1016/j.jallcom.2024.177974

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al2O3 f/Al2O3 composites are considered the up-and-coming candidates for high-temperature microwave transparency applications due to their low dielectric constant, and excellent resilience to heat and oxidation. The interface phase plays a critical role in determining the mechanical properties. Here, the LaPO4 interface layer was introduced in the Al2O3 f/Al2O3 composites successfully via a straightforward and effective precursor transmission method. The fabricated Al2O3 f/LaPO4/Al2O3 possesses a low porosity of 13.5 % and a high density of 2.61 g/cm3. As anticipated., its bending strength reaches 110.3 MPa and its fracture displacement reaches 0.21 mm. More important, the microwave transmittance remains above 90 % for thicknesses ranging from 1 to 2.28 mm and 7.25-7.77 mm throughout the X-band (4.2 GHz, 8.2-12.4 GHz). Consequently, they create prospects for utilizing interface strategies to design a category of functional materials that possess both high strength and high-temperature microwave transparency for various applications.

引用

页数：10

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