【摘要】：以硝酸鐵、硝酸鋇、檸檬酸為原料,采用溶膠-凝膠法合成鋇鐵氧體溶膠,將其吸附于多孔陶粒表面和微孔中,經(jīng)焙燒制備得到電磁吸波功能陶粒;再將該功能陶粒用作集料制備新型水泥基復(fù)合吸波材料。研究了合成的鋇鐵氧體的物相、形貌、復(fù)介電常數(shù)和復(fù)磁導(dǎo)率;結(jié)果表明合成的鋇鐵氧體純度高,合成溫度對(duì)其結(jié)晶度和晶體形貌有影響,經(jīng)1000℃煅燒制得的鋇鐵氧體具有良好的吸波能力;對(duì)制得的功能陶粒進(jìn)行了測(cè)試,結(jié)果表明鋇鐵氧體能包覆至陶粒表面和孔壁上;采用弓形法測(cè)得的功能陶粒水泥基吸波材料在8~18GHz頻率范圍內(nèi)的電磁波反射率明顯優(yōu)于采用碎石和普通陶粒制備的試樣。
[Abstract]:Barium ferrite sol was synthesized by sol-gel method using ferric nitrate, barium nitrate and citric acid as raw materials. Barium ferrite sol was adsorbed on the surface and micropore of porous ceramsite. Then the functional ceramsite is used as aggregate to prepare new cement-based composite absorbing materials. The phase, morphology, complex permittivity and complex permeability of the synthesized barium ferrite were studied. The results show that the synthesized barium ferrite has high purity, and the synthesis temperature has an effect on its crystallinity and crystal morphology. The barium ferrite calcined at 1000 鈩，

本文編號(hào)：2371933