CAJ | 학술논문

采用氧化物陶瓷工艺制备2~4MHz高频开关电源用MnZn功率铁氧体,通过对铁氧体断面显微结构、密度和磁性能的测试,研究了TiO2掺杂量对材料微观结构、磁导率和功率损耗的影响.结果表明,随着TiO2掺杂量的增加,样品平均晶粒尺寸先减小后增大,磁导率单调减小,不同温度(25℃、100℃)下的磁心总功率损耗(激励条件3MHz,10mT、25mT)先减小后增大.说明TiO2的适量掺杂可以改善高频MnZn功率铁氧体的微观结构,降低其功耗.
채용양화물도자공예제비2~4MHz고빈개관전원용MnZn공솔철양체,통과대철양체단면현미결구、밀도화자성능적측시,연구료TiO2참잡량대재료미관결구、자도솔화공솔손모적영향.결과표명,수착TiO2참잡량적증가,양품평균정립척촌선감소후증대,자도솔단조감소,불동온도(25℃、100℃)하적자심총공솔손모(격려조건3MHz,10mT、25mT)선감소후증대.설명TiO2적괄량참잡가이개선고빈MnZn공솔철양체적미관결구,강저기공모.
MnZn power ferrites for 2-4MHz high frequency switch power supply were prepared by conventional oxide ceramic process. The influence of TiO2 doping on the microstructure, permeability and core loss of MnZn power ferrites was investigated by means of characterizing the fracture surface micrograph, density and magnetic properties. The results indicate that with increasing TiO2 doping content the average grain size decreases first and then increases, and permeability decreases monotonously, while the core loss of MnZn power ferrites decreases first and increases subsequently at 25℃ and 100℃ and different exciting condition(3MHz, 10mT and 3MHz, 25mT).The appropriate amount of TiO2 doping can improve the microstructure of MnZn power ferrites and resultantly decrease the core loss of MnZn power ferrites.