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采用溶胶-凝胶法制备了(1-x)BaFe12O19/xBaTiO3复合吸波材料(x=0、0.1、0.3、0.5、0.7、0.9、1)。研究了钛酸钡含量对复合样品晶体结构、微观形貌以及微波性能的影响。结果表明,于900℃煅烧的样品形成了BaFe12O19相和BaTiO3相共存的BaFe12O19/BaTiO3复合体系;当钛酸钡含量在0.3～0.7时,复合样品的介电损耗和磁损耗显著增强,提高了微波吸收性能,拓宽了有效吸收频带;当厚度为3mm时,x=0.5的复合样品在频率为13GHz处的最强吸收峰为14.8dB,x=0.7的复合样品的有效吸收频宽可达3.4GHz。
(1-x) BaFe12O19 / xBaTiO3 composite microwave absorbing materials (x = 0,0.1,0.3,0.5,0.7,0.9,1) were prepared by sol-gel method. The effect of barium titanate content on the crystal structure, microstructure and microwave properties of the composite samples was studied. The results show that the BaFe12O19 / BaTiO3 composite system with BaFe12O19 phase and BaTiO3 phase coexist is formed in the sample calcined at 900 ℃. When the content of barium titanate is between 0.3 and 0.7, the dielectric loss and magnetic loss of the composite sample increase significantly, Absorbing properties and broadening the effective absorption band. When the thickness is 3mm, the maximum absorption peak of the composite sample with x = 0.5 at the frequency of 13GHz is 14.8dB, the effective absorption bandwidth of the composite sample with x = 0.7 is up to 3.4GHz .