【摘要】 为了研究粉料粒度分布对宽温低功耗MnZn铁氧体磁性能的影响,采用氧化物陶瓷工艺制备MnZn铁氧体,用激光粒度测试仪、扫描电镜(SEM)以及软磁测试系统等仪器测试和分析了不同二次球磨时间样品的粒度分布、MnZn铁氧体的断面显微结构以及功率损耗、密度和起始磁导率。结果表明,随着二次球磨时间延长,粉料粒度不断减小,粒度分布在1μm以下占比增高。MnZn铁氧体的密度、起始磁导率及饱和磁感应强度先增大后减小,功率损耗先减小后增大。当粒度1μm以下占50%、2μm以下占90%,样品的密度,颗粒尺寸和宽温功耗特性最佳。更多还原

【Abstract】 In order to study the influence of powder particle size distribution on the magnetic properties of MnZn ferrite with wide temperature and low power loss, MnZn ferrite was prepared by oxide ceramic process, and laser particle size tester, SEM and soft magnetic test system were used to characterize the particle size distribution of samples with different secondary ball milling time, the cross-sectional microstructure of MnZn ferrite, power loss, density and initial permeability. The results show that with the extension of the secondary ball milling time, the particle size of the powder continues to decrease, and the proportion of the particle size distribution below 1 μm increases. The density, initial permeability and saturation magnetic induction intensity of MnZn ferrite first increases and then decrease, but the power loss changes oppositely. When the particle size under 1 μm and 2 μm is 50 % and 90 %, the sample density, grain size and wide temperature power consumption characteristics are the best.更多还原