您现在的位置: 首页> 研究主题> 起始磁导率

起始磁导率

起始磁导率的相关文献在1958年到2022年内共计93篇,主要集中在电工技术、金属学与金属工艺、一般工业技术 等领域,其中期刊论文76篇、会议论文6篇、专利文献2584篇;相关期刊36种,包括材料导报、功能材料、上海钢研等; 相关会议6种,包括中国磁性材料发展与行业形势研讨会、2006年全国功能材料学术年会、全国电感器件技术交流和信息发布会等;起始磁导率的相关文献由179位作者贡献,包括张怀武、苏桦、张延忠等。

起始磁导率—发文量

期刊论文>

论文:76 占比:2.85%

会议论文>

论文:6 占比:0.23%

专利文献>

论文:2584 占比:96.92%

总计:2666篇

起始磁导率—发文趋势图

起始磁导率

-研究学者

  • 张怀武
  • 苏桦
  • 张延忠
  • 余忠
  • 兰中文
  • 许启明
  • 冯则坤
  • 向兴元
  • 唐晓莉
  • 孙科
  • 期刊论文
  • 会议论文
  • 专利文献

搜索

排序:

年份

    • 李晏春; 王晨阳; 李冰; 亓国瑞
    • 摘要: 通过对铁氧体粉料制备过程进行研究,锰锌软磁铁氧体材料配方中增加氧化锌含量至20%~25%mol;优化砂磨工艺,配合砂磨时间由120min降低至105min,料浆固液比71.5%提高至72.5%;创新采用Bi_(2)O_(3)和Nb_(2)O_(5)复合添加方式,成功开发出起始磁导率>10000 H、宽频段100 kHz不衰减的R10k锰锌软磁铁氧体产品。
    • 李兴照
    • 摘要: 进入21世纪以来,新材料的重要性逐步被人们认知,磁性材料的理论、生产及其应用也得到了快速发展,已经成为信息、航空航天、通信、人体健康等领域的重要材料基础。经研究,材料结构对材料磁学性能具有影响,是涉及材料具体应用的重要因素。文章主要介绍了材料的晶体结构及显微结构对磁学性能影响,包括硬磁、软磁等相关特性,重点阐述了材料结构对锰锌铁氧体软磁材料及Nb-Fe-B永磁材料相关性能的影响,并对相关机理进行了分析。
    • 胡鑫; 余忠; 孙科; 郭荣迪; 蒋晓娜; 兰中文
    • 摘要: 采用氧化物陶瓷工艺制备了高频MnZn功率铁氧体,基于动态磁化理论和损耗分离方法,研究了烧结氧分压对材料显微结构、磁导率和损耗的温度特性的影响.结果表明,随着氧分压的增大,室温下MnZn功率铁氧体的密度d、平均晶粒尺寸D、电阻率 ρ 和起始磁导率 μi逐渐减小,而磁滞损耗Ph和涡流损耗Pe逐渐增大,同时 μi-T曲线的二峰位置和Ph-T曲线的最小值所对应的温度逐渐移向高温.相同氧分压烧结MnZn功率铁氧体的涡流损耗Pe和剩余损耗Pr均随温度升高而增大.在氧分压为2%时,高频MnZn功率铁氧体具有最优性能,室温下起始磁导率 μi为1175,1 MHz/50 mT时20°C与100°C的损耗PL分别为359 kW/m3和486 kW/m3,3MHz/10mT时20°C与100°C的损耗分别为221 kW/m3和301 kW/m3.
    • 毕建国; 燕杰; 徐荣; 陈志华
    • 摘要: 采用传统氧化物陶瓷工艺制备锰锌铁氧体,研究了主配方的氧化铁含量、烧结工艺等因素对材料微观结构和磁导率的影响.结果表明,主配方氧化铁含量在52.2 mol%时,可以获得较好的磁导率温度特性;烧结温度1380°C,保温8~12 h,有助于提高起始磁导率;晶粒直径25μm左右和致密的微观结构,可提高材料的起始磁导率.通过优化配方和制备工艺,开发出了宽温、高磁导率锰锌铁氧体材料RH15K,性能如下:起始磁导率μi:15000±30%(25°C,10 kHz),μi>5000(-40°C,10 kHz),居里温度TC>105°C.%MnZn ferrites were prepared by conventional oxide ceramic method. The influence of content of iron oxide in main component and sintering process on the microstructure and permeability was investigated. The results indicates that good temperature dependence of permeability for iron oxide content of 52.2 mol%; sintering at 1380°C for 8 to 12 hours resulted in good grain size of 25μm and compact microstructure, which can improve initial permeability. MnZn ferrite material RH15K was developed with high permeability in wide temperature range as a result of optimization of main component and sintering process. The performance is as follows: initial permeabilityμi:15000±30 % (25°C,10 kHz),μi>5000 (-40°C, 10 kHz),Curie temperatureTC>105°C.
    • 黄爱萍; 谭福清; 豆小明
    • 摘要: 采用传统陶瓷工艺及通过调整主配方,成功研制出了二峰温度从25°C至140°C的一系列超高饱和磁通密度Mn-Zn铁氧体材料。结果显示,因为锰锌铁氧体材料的饱和磁通密度Bs取决于主配方以及致密度,超富铁主配方是获得超高Bs锰锌铁氧体材料的必要条件;在超富铁主配方中,增加Fe2O3含量或ZnO含量都会使二峰温度升高,与常规配方是完全相反的变化规律;二峰温度越高,最低损耗值越高、高温Bs越高、起始磁导率越低、相对密度越低。%A series of ultra-highBs Mn-Zn ferrite materials with second peak temperatures from 25°C to 140°C are successfully developed by adjusting the main formula and traditional ceramic process. The results show that super rich iron main formula is necessary for obtaining MnZn ferrite materials with ultra-highBs, because of theBs of MnZn ferrite materials is determined by composition and density. The increase of Fe2O3 or ZnO content in the super rich iron main formula can increase the second peak temperature, exactly different from the variation of the conventional formula. The higher second peak temperature, the higher minimum loss value andBsvalue, and the lower initial permeability and relative density.
    • 王微达; 李永劬; 李明治
    • 摘要: MnZn power ferrites with same composition and addition were prepared sintering at 1360°C, 1330°C and 1300°C. The results of SEM show that reduction of sintering temperature decreases grain size effectively, and the pores in grain are eliminated. The results also show that the grain is more uniform and the grain boundary is clearer. The results of electromagnetic performance indicate that sintering temperature has insignificant effect on initial permeability, but magnetic flux density increases and power loss decreases significantly at 100kHz/200mT and 100°C while sintering temperature drops. The power loss is about 255kW/m3, for sample sintered at 1300°C.By the loss separation, improvement of total power loss is mainly a result of drop in the eddy current loss.%使用同一配方制备得到的锰锌铁氧体坯件分别在1360°C、1330°C、1300°C下采用平衡气氛法烧结,制备得到致密的锰锌铁氧体磁环。SEM结果表明,降低烧结温度有效地减小了晶粒尺寸,消除了晶粒内部气孔,改善了晶粒均匀程度,使晶界更为清晰。电磁性能测试表明,在三种温度烧结得到的锰锌铁氧体材料的起始磁导率μi没有显著差异;饱和磁感应强度Bs随烧结温度降低有小幅上升;总功率损耗随烧结温度的降低而下降;并且在1300°C烧结的铁氧体材料的功率损耗(100kHz/200mT,100°C)很低,约为255kW/m3。通过损耗分离证实,总功率损耗的改善主要是涡流损耗大幅降低所致。
    • 马玉启; 刘先松; 冯双久; 黄鑫; 黄风
    • 摘要: 采用固相反应法制备化学计量为Ni0.65 Zn0.35 Snx Fe2- x O4(x=0.00~0.08)的铁氧体软磁材料。采用XRD、SEM、LCR测试仪、B‐H分析仪对其结构、电磁性能进行研究。结果表明:随Sn4+取代量 x的增加,晶格常数 a逐渐增大,晶粒尺寸变化不大,饱和磁通密度 Bs 逐渐下降,铁氧体的起始磁导率μi 先上升后下降,功率损耗 Pcv与μi 的变化呈相反趋势。当S n4+的取代量 x=0.04时具有最低的功率损耗,且 Pcv随着温度的升高而逐渐降低。%The stoichiometric Ni0.65Zn0.35SnxFe2 - xO4(x=0 .00‐0 .08) power ferrites soft magnetic ma‐terial was prepared by the solid‐state reaction method .The structural characteristics and electromag‐netic properties were investigated by X‐ray diffraction(XRD) ,SEM ,LCR tester ,B‐H analyzer ,respec‐tively .The results indicate that with increasing Sn4+ substitution amount ,lattice constant a increases gradually ,grain size varies not much ,saturation magnetic flux density Bs continuously decreases ,ini‐tial permeability μi of the ferrites increases initially and then decreases ,and pow er loss Pcv has an op‐posite change with μi .The power loss Pcv has a minimum value when the Sn4+ substitution amount is 0 .04 and Pcv decreases gradually w hen the temperature increases .
    • 黄鑫; 刘先松; 马玉启; 黄凯
    • 摘要: 采用陶瓷工艺制备了 Al 替代的 Ni0.5 Zn0.5 Alx Fe2-x O 4(x =0~0.10)铁氧体材料,用 XRD、B-H分析仪和阻抗分析仪对其结构和磁性能进行了研究.实验发现,最佳烧结温度为1250°C,过高和过低的烧结温度不利于降低磁芯损耗.当 Al3+替代量 x =0.06时,铁氧体能获得较好综合磁性能.%Al substituted Ni0.5 Zn0.5 Alx Fe2 -x O 4 (x =0-0.10)ferrite materials were prepared by using ceramic tech-nology,XRD,B-H analyzer and impedance analyzer were applied to investigate its structural morphological and magnetic properties.The experimental results indicate that the best sintering temperature was 1 250 °C and an over-high or over-low sintering temperature was adverse to reduce the magnetic core loss.Ferrite can achieve a preferably integrated performance with x =0.06.
    • 范秀风; 闫永旺
    • 摘要: 本文利用传统陶瓷制备工艺制备了Ni-Zn铁氧体材料,用SEM,XRD观察其微观结构,使用Agilent 4294A阻抗分析仪检测样品的磁性能.研究了不同烧结温度对Ni0.4Zn0.6Fe2O4材料的起始磁导率、功耗和显微结构的影响.结果表明,在1 250°C烧结时试样有较好的综合性能,不仅具有较高的磁导率而且损耗也较小.
    • 王华成; 余忠; 孙科; 傅膑; 柴治; 魏培伟; 兰中文; 赵辉
    • 摘要: 采用氧化物陶瓷工艺制备高磁导率MnZn铁氧体材料,研究了CaO和MoO3添加对材料磁性能的影响。添加CaO可以形成高阻晶界层,增大材料电阻率,明显增大材料的中频阻抗。添加MoO3能促进晶粒长大,提高起始磁导率,但磁导率频率特性变差。当复合添加0.04wt% CaO和0.07wt% MoO3时,材料具有较好的综合性能:μi=11495,μ200kHz/μ10kHz=98%,T25×15×8的环状磁心在50mV、500kHz测试条件下,阻抗Z=2255Ω。%High permeability MnZn ferrite materials were prepared using oxide ceramic technology. The effect of CaO and MoO3 additives on the magnetic properties of MnZn ferrites was investigated. The addition of CaO can facilitate to form high resistance grain boundary layers, increasing the resistivity of the ferrite and significantly increasing the middle frequency impedance. MoO3 additive can promote grain growth, increasing the permeability of MnZn ferrite, but deteriorating the frequency dependence of permeability. When adding 0.04wt% CaO and 0.07wt%MoO3, better general properties were obtained withμi=11495,μ200kHz/μ10kHz=98%, core impedance of 2255Ωat 50mV and 500kHz.
  • 查看更多

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号