高频陶瓷粉体/Fe磁粉芯的微观结构与磁性能研究  

Microstructure and Magnetic Properties of High-frequency Ceramic Powders/Fe Magnetic Core

作　　者：胡雪松[1] 杜琰[2] 朱正吼[3] 

机构地区：[1]江西工业贸易职业技术学院机电系,江西南昌330031 [2]江西中医学院计算机系,江西南昌330004 [3]南昌大学材料科学与工程学院,江西南昌330031

出　　处：《热加工工艺》2011年第24期140-142,196,共4页Hot Working Technology

基　　金：江西省科技支撑项目(kj200813)

摘　　要：对高纯铁粉进行表面改性处理,处理后的铁粉分别与SiO2、Al2O3及TiO2粉体用高能球磨法进行复合,在模具中压制成型,然后进行热处理。结果表明:Al2O3/Fe复合粉体具有最佳的成型性能,经过模压后磁粉芯的致密度达到理论密度的75.4%。该磁粉芯经1000℃×1h热处理后,磁粉芯内铁粉出现冶金结合,当Al2O3陶瓷粉体含量大于3%时,生成典型的Al2O3/Fe复合材料,该复合材料的电阻大大高于铁基体材料,使得该磁粉芯的高频性能得到提高;当复合3%Al2O3陶瓷粉体时,Al2O3/Fe磁粉芯磁导率μi为44.58,中心频率f达到12.02 MHz,中心频率品质因素Q达到14.6,综合高频软磁性能最佳。After surface modification, high purity iron powder was mixed with SiO2, A1203 and TiO2 by high-dnergy ball milling method respectively, then forming by mold pressing and heat treatment. The results show that： A12O3/Fe composite powder has the best performance; its density reaches 75.4% of theoretical density after molding; the magnetic core, after ＂1000 ℃ x insulation 1 h＂ heat treatment, a metallurgical bonding occurs; when the ceramic powder content is larger than 3%, typical A12O3/Fe composite is created. The resistance of the composite is much higher than iron based material. When the content is at 3%, A12O3/Fe magnetic core obtainsui/xl of 44.58,f to 12.02 MHz, Q of 14.6, with the best overall high-frequency soft mamaetic orooerties.

关 键 词：Al2O3Fe复合材料 磁粉芯 高频软磁性能 

分 类 号：TB333[一般工业技术—材料科学与工程]