Effect of Annealing on the Microwave-absorption Properties of Ni/Al2O3 Nanocomposites

被引：0

作者：

Songning XU ^{[1
]}

Meixing ZHAO ^{[1
]}

Zongqi CAI ^{[1
]}

Naikun SUN ^{[1
]}

Feng LIU ^{[1
]}

Baosheng DU ^{[1
]}

Xueyuan ZHANG ^{[1
]}

Zhoujun LING ^{[1
]}

机构：

[1] School of Science,Shenyang Ligong University

来源：

Acta Metallurgica Sinica(English Letters) | 2013年 / 26卷 / 04期

关键词：

Microwave-absorption; Reflection loss; Microstructure;

D O I：

暂无

中图分类号：

TB33 [复合材料]; TG156.2 [退火];

学科分类号：

080201 ; 0805 ; 080502 ; 080503 ;

摘要：

Ni/Al2O3 nanocomposites were prepared by the mechanochemical synthesis method.The annealing process enlarges the grain size of both the metal Ni and insulating Al2O3 in the as-milled nanocomposite and leads to an increase of the saturation magnetization and a decrease of the surface anisotropy.An optimal reflection loss(RL) of 23 dB is obtained in the as-milled nanocomposite at 17.8 GHz for an absorber thickness of 6.6 mm.The annealed sample exhibits a RL exceeding 20 dB in the whole K u-band for an absorber thickness of 6.6-9.7 mm with an optimal RL of 54.7 dB at 13.2 GHz for a layer thickness of 9.3 mm.The excellent microwave-absorption properties are a consequence of a proper match of the dielectric and magnetic losses.

引用

页码：385 / 389

页数：5

共 4 条

[1] EffectofSicontentonorderingdegreeandelectromagneticcharacteristicsinFeSiAlalloys[J].T.D.Zhou,L.J.Deng,D.F.Liang. ActaMetallurgicaSinica.2008(3)
[2] SoftferromagnetisminnanostructuredmechanicalalloyingFeCo-basedpowders[J].QiZeng,IanBaker,VirginiaMcCreary,ZhichengYan. JournalofMagnetismandMagneticMaterials.2007(1)
[3] MicrostraineffectonthermalpropertiesofnanocrystallineCu[J].L.H.Qian,S.C.Wang,Y.H.Zhao,K.Lu. ActaMaterialia.2002(13)
[4] PerformanceofradarabsorbingmaterialsbywaveguidemeasurementsforX-andKu-bandfrequencies[J].MagaliSilveiraPinho,MariaLuisaGregori,ReginaCéliaReisNunes,BlumaGuentherSoares. EuropeanPolymerJournal.2002(11)

← 1 →