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镍锌铁氧体粉体合成新方法 总被引:7,自引:0,他引:7
本文研究了共沉淀法合成镍锌铁氧体粉料,在测定镍锌铁碳酸盐及氢氧化物溶解度曲线基础上研究共沉淀时各种因素对粉体组成及质量的确定了制备镍锌铁氧体共沉粉的工艺条件。 相似文献
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考察了攀钢冷轧厂RuthnerFe2O3粉理化性能,研究了用RuthnerFe2O3粉制备永磁铁氧体的预烧工艺、摩尔比、烧结温度等工艺制度,制取的永磁铁氧体磁性能达到或超过SJ/T10410-93标准中的Y30H-1牌号水平。 相似文献
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采用顺加料与逆加料方式进行了制备铁氧体粉末的水热实验研究,考察了不同加料方式下得到的粉体的粒度分布、比表面积大小及XRD图谱情况,并用化学及热力学理论对实验结果进行了初步分析探讨。由实验及理论分析均证明:加料方式不同,得到的粉体性能有差异。逆加料方式制铁氧体粉末效果优于顺加料方式。 相似文献
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草酸盐共沉淀法制取优质锰锌铁氧体微细粉末的热力学分析 总被引:10,自引:0,他引:10
对草酸盐共沉淀法制取锰锌铁氧体软磁材料粉末的FeSO4ZnSO4MnSO4(NH4)2C2O4H2O体系进行热力学分析,得出最佳pH为40~82,热力学计算与试验吻合。草酸盐共沉淀粉末煅烧后平均粒径220μm,烧结温度比普通干法制粉低40℃左右,制得的温敏锰锌铁氧体材料起始磁导率达4550左右,温度灵敏度≤15℃,并在磁性温敏传感器中应用效果良好 相似文献
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电源用低损耗锰锌铁氧体的开发1概述近年来,随着电器向小型化及节能方向的迅速发展,也要求这些电器用的开关电源做到体积小、重量轻、效率高。开关电源的部件中,变压器在体积、电耗等方面占有很大的比例。因此,在改善变压器特征,特别是改善用于铁芯材料的锰锌铁氧体... 相似文献
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高饱和磁感应强度S型NiZn铁氧体的工艺优化研究 总被引:5,自引:0,他引:5
采用化学共沉淀法,按照一定的配比合成S型NiZn铁氧体。通过对NiZn铁氧体合成工艺参数的优化,可以提高NiZn铁氧体的饱和磁感应强度。研究表明,在0~100℃的反应温度内,随着温度的升高,NiZn铁氧体的饱和磁感应强度增加;在其他条件相同的情况下,当主体反应物Fe^3 浓度增加时,NiZn铁氧体的饱和磁感应强度相应地增加;共沉淀法合成的NiZn铁氧体在1000℃烧结温度下,60~240min范围内,烧结时间为90min时,饱和磁感应强度值最大。 相似文献
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利用黄钾铁矾渣制备软磁锰锌铁氧体工艺研究 总被引:2,自引:0,他引:2
以黄钾铁矾渣和硫酸锰为原料,通过热酸浸出、净化除杂、共沉淀和铁氧体工艺等过程,制备出锰锌铁氧体产品。实验结果表明,Fe和Zn的浸出率为90%~95%,Cu2+、Cd2+、Ca2+和Mg2+平均去除率分别为99%、85%、92%及85%;共沉淀粉含Fe 45.11%、Mn 16.12%、Zn 4.97%、Ca 0.0155%、Mg 0.0025%、Si 0.0017%、Cu 0.00058%、Cd 0.0006%;铁氧体产品的磁性能够达到日本TDK公司PC30指标。 相似文献
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由矿物原料直接制备锰锌软磁铁氧体的研究 总被引:2,自引:0,他引:2
以软锰矿、硫化锌精矿及铁屑等为原料,研究了直接法制备锰锌软磁铁氧体的工艺条件,重点研究了浸出液复盐沉淀深度净化的工艺条件。同时浸出和初步除杂过程中,Fe,Mn和Zn的浸出率分别为91.3%,98.2%和81.4%;Cu~(2 ),pb~(2 ),Cd~(2 ),Ca~(2 )和Mg~(2 )的去除率分别为96.23%,91.63%,88.45%,94.63%和90.93%。沉淀剂硫酸铵的浓度和溶液酸度是复盐沉淀深度净化深度除Si的主要影响因素,其优化条件为:浸出液pH=1.5~2.5,游离硫酸铵浓度2.0~2.5 mol/L,时间1.0~1.5 h,室温。共沉淀粉料中各杂质元素的质量分数很低,其平均值为Ca 0.0069%,Mg 0.0165%,SiO_2 0.014%,Pb 0.00112%,Cu 0.00268%,Cd 0.00209%。各样环磁性能指标接近日本TDK公司PC30产品标准。 相似文献
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V. V. Nepomnyashchii T. V. Mosina A. K. Radchenko G. Ya. Kalutskii 《Powder Metallurgy and Metal Ceramics》2006,45(3-4):109-112
The possibility of preparing very fine strontium ferrite powder with application of preliminary mechanical treatment in a
rolling mill is studied. It is established that powder preparation time is shortened by a factor of 2.5–3 and the amount of
coarse particles is reduced. The method used for preparing very fine powder makes it possible to control the size of particles
and their specific surface. The powder may be used for preparing permanent magnets with a high specific magnetizability (above
32 kJ/m3).
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Translated from Poroshkovaya Metallurgiya, Nos. 3-4(448), pp. 3–6, March–April, 2006. 相似文献
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采用粉末冶金工艺,结合CaSiO_3与BBSS助熔剂的复合掺杂技术,制备了M型稀土永磁铁氧体。用费氏粒度仪测量成形用颗粒料的平均粒度,用SEM、EDS、XRD、永磁铁氧体测量仪等分析测试样品的显微结构、物相、断面形貌及磁学性能,用浮力法测定样品表观密度。结果表明:CaSiO_3与BBSS助熔剂的复合掺杂促进了M型稀土永磁铁氧体晶粒的均匀生长,改善了产品的取向度,从而明显改善了产品的磁性能及内禀矫顽力HCJ的温度系数β(HCJ),但铁氧体的居里温度略为下降。对Ca_(0.45)La_(0.45)Sr_(0.1)Fe_(10.3)Co_(0.3)O_(19-δ)预烧料,细粉碎时添加0.7%的CaSiO_3、0.4%的助熔剂BBSS(均为质量分数),经成形、烧结之后,可获得Br为455 m T,HCJ为412 k A/m,M*值为6 275.3、Hk/HCJ为95.8%的M型高性能稀土永磁铁氧体。 相似文献
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A. B. Al'tman P. A. Gladyshev I. D. Rastanaev 《Powder Metallurgy and Metal Ceramics》1964,3(2):143-146
Summary The results are presented of an investigation of soft magnetic iron-aluminum, iron-silicon, and iron-silicon-aluminum alloys produced by powder metallurgy methods. A study was made of the effect of preparation conditions on the magnetic and electrical properties of these alloys. It was found that powder metallurgy permits the preparation of one-piece magnetic cores which in many cases can be used in 50 cps alternating fields. 相似文献
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Preparation and magnetic properties of Cu0.4Zn0.6Cr0.5Sm0.06Fe1.44O4/polyaniline nanocomposites 总被引:1,自引:0,他引:1
A self-propagating combustion synthesis (SPCS) method, citrate SPCS method, was used to synthesize Cu0.4Zn0.6Cr0.5SmxFe1.5-xO4 (x=0-0.1) nanosized powders at relatively low temperature. Polyaniline/Cu0.4Zn0.6Cr0.5Sm0.06Fe1.44O4 (CZCS0.06FO) nanocomposites were prepared by in situ polymerization of aniline in the presence of CZCS0.06FO ferrites. The structures, morphologies, and ferromagnetic properties of ferrite powders and nanocomposites were characterized by powder X-ray diffractometer (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), and vibrating sample magnetometer (VSM). The results indicated that ferrite powders were coated effectively by polyaniline, which reduced the agglomeration of ferrite particles to certain extent, and was helpful to the decentralization and stabilization of nanoparticles. The nanocomposites with core-shell structure under applied field exhibited hysteresis loops of the ferromagnetic nature. The nanocomposites were fit for being used as soft magnetic material because of their lower coercivity than that of pure ferrites. 相似文献
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