不同铁粉对宽温高导MnZn铁氧体直流叠加性能的影响  

Effects of different iron powders on DC-bias-superposition properties of MnZn ferrite with wide temperature and high conductivity

作　　者：贺贤举 欧阳昌伟 杨军 王翔 HE Xianju;OUYANG Changwei;YANG Jun;WANG Xiang(Zhengye Longteng New Material Development Co.Ltd.,Guiyang 550005,China)

机构地区：[1]贵州正业龙腾新材料开发有限公司,贵州贵阳550005

出　　处：《兵器材料科学与工程》2023年第1期117-121,共5页Ordnance Material Science and Engineering

摘　　要：以进口和国内4种不同铁粉为原料,通过传统陶瓷工艺制备宽温高导高直流叠加MnZn铁氧体。通过XRF分析4种铁粉成分差异,研究不同铁粉配方的铁氧体宽温直流叠加特性,通过SEM对铁氧体内部进行微区分析。结果表明:日本铁粉杂质含量低、纯度高,制备的铁氧体性能最佳;韩国和中国台湾铁粉有害杂质元素含量偏高,不利于制备宽温高导高直流叠加性能的铁氧体;湖南涟钢铁粉有害杂质元素略高于日本铁粉,调整主配方Fe_(2)O_(3)及添加剂CaCO_(3)、SiO_(2)用量后,涟钢铁粉制备的铁氧体性能在-40℃时起始磁导率μi≥3200、增量磁导率μ△≥2900;25℃时μi≥4100、μ△≥3600;85℃时μi≥4500、μ△≥2400。MnZn ferrite with wide temperature,high conductivity and high DC‐bias‐superposition was prepared by traditional ceramic process with four kinds of imported and domestic iron powders as raw materials.The composition differences of the four iron powders were analyzed by XRF,and the wide temperature DC‐bias‐superposition characteristics of ferrite under different iron powder formulations were studied.The interior of ferrite was analyzed by SEM.The results show that Japanese iron powder has low impurity content and high purity,and the prepared ferrite has the best performance.The contents of harmful impurity elements in Korean and Chinese taiwan iron powder are high,which is not conducive to the preparation of ferrite with wide temperature,high conductivity and high DC‐bias‐superposition performance.The harmful impurity elements of Hunan Lian′gang iron powder are slightly higher than those of Japanese imported iron powder.After adjusting the dosage of main formula Fe_(2)O_(3)and additives CaCO_(3)and SiO_(2),the ferrite properties prepared by Hunan Lian′gang iron powder reach initial permeabilityμi≥3200,incremental permeabilityμ△≥2900 at-40℃.μi≥4100 andμ△≥3600 at 25℃.μi≥4500 andμ△≥2400at 85℃.

关 键 词：铁粉 MNZN软磁铁氧体 磁导率 宽温直流叠加性能 

分 类 号：TB34[一般工业技术—材料科学与工程]