NiFe1 . 98Nd0 . 02O4-Fe 双层吸波涂层设计及制备

张泽洋; 刘祥萱; 张海丰; 李伟; 燕艳

ZHANG Ze-yang,LIU Xiang-xuan,ZHANG Hai-feng,LI Wei,YAN yan.Design and Preparation of Double-layer Microwave Absorbers Based on Carbonyl Iron and NiFe_{1 . 98}Nd_{0 . 02}O₄[J],43(4):119-123

Design and Preparation of Double-layer Microwave Absorbers Based on Carbonyl Iron and NiFe_{1 . 98}Nd_{0 . 02}O₄

Received:March 18, 2014 Revised:April 05, 2014

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KeyWord:Nd substitution double-layers absorber reflectivity microwave absorbing property

Author	Institution
ZHANG Ze-yang	The Second Artillery Command College, Wuhan , China
LIU Xiang-xuan	The Second Artillery Engineering University, Xi忆an , China
ZHANG Hai-feng	The Second Artillery Command College, Wuhan , China
LI Wei	The Second Artillery Command College, Wuhan , China
YAN yan	The Second Artillery Command College, Wuhan , China

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Abstract:

Objective To prepare high-performance double-absorbing coating NiFe_{1 . 98}Nd_{0 . 02}O₄ -Fe. Methods Nd substituted nickel ferrites ( NiFe_{1 . 98}Nd_{0 . 02}O₄ ) were prepared using the sol-gel-autocombustion method. The microstructures, morphology and the electromagnetic properties of NiFe_{1 . 98}Nd_{0 . 02}O₄ and carbonyl iron were characterized with X-ray diffraction ( XRD) , scanning electron microscopy ( SEM) and a vector network analyzer. The thickness of double-layers microwave absorption coating was optimized by the genetic algorithm ( GA) . Results Using carbonyl iron and NiFe_{1 . 98}Nd_{0 . 02}O₄ as absorbents, double composite absorbing coating with thickness d = 1 mm was prepared. The results showed that the reflection loss of coating was less than-10 dB over the range from 9. 25 GHz to 11. 35 GHz. Conclusion The results of measurements showed that the microwave absorption property of NiFe_{1 . 98}Nd_{0 . 02}O₄ and carbonyl iron were complementary to each other. The calculated RL agreed closely with the experimental results in the whole measured frequency range.