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光亮Fe—Ni合金电沉积工艺的研究 总被引:6,自引:2,他引:6
介绍了一种新的电沉积光亮Fe-Ni合金的方法。用这种方法在室温下电沉积出外观接近镜面的Fe-Ni合金镀层,其厚度可达37μm。经X-ray衍射及等离子光谱分析证实,所获得的合金镀层为γ(Fe-Ni)合金相,镀层中含Fe和Ni的量分别为23.5% ̄45.7%和76.2% ̄53.8%,同时含有少量的P和B元素。文中对电沉积的工艺条件、光亮剂HB、添加剂HT的作用和影响进行了分析和探讨。 相似文献
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Ni-Zn铁氧体粉体的水热法制备与磁性研究 总被引:4,自引:0,他引:4
采用水热法合成Ni0.5Zn0.5Fe2O4粉体,并用XRD、TEM和VSM对粉体进行表征。实验结果表明:在pH=8时,130℃反应1h才生成比较完整的Ni0.5Zn0.5Fe2O4尖晶石型晶体;温度高和反应时间长有利于得到晶型结构好的粉体;粉体颗粒均匀呈球形,粒子尺寸随反应时间的延长和温度的升高而增大。130—200℃水热反应过程的晶粒生长活化能为41.6kJ/mol。磁性测量表明采用不同温度热处理的Ni0.5Zn0.5Fe2O4粉体,随热处理温度升高,饱和磁化强度增加,矫顽力下降。 相似文献
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通过介绍以钛白副产硫酸亚铁、工业酸洗废液、平炉红尘等为原料制备软磁用α-Fe2O3的工艺,探讨了工艺方法、工艺参数及影响因素等。 相似文献
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Magnetite was modified by reaction with alkaline solution containing Co^2 and Fe^2 to obtain a cobalt ferrite layer on the surface of particles. The influences of modification conditions on the properties were investigated. The as-prepared particles were characterized by X-ray diffraction(XRD) and transmission electron microscope(TEM). The results show that pH value influences the particles composition directly, the desirable CoFe2O4 is obtained as pH value is 12. The coercivity of particles increases with the increase of cobalt content, and the cobalt efficiency reaches a maximum value at cobalt content of 2.71% (mass fraction). With cobalt modification, the magnetite particles have the similar lattice constant and structure to that without cobalt modification, and the squareness ratio is almost 0.5. The increase of the coercivity is attributed to the uniaxial magnetic anisotropy and magnetocrystalline anisotropy of cobalt-ferrite itself. 相似文献
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Comparisons of species and coagulation effects of PFS solution and solid PFS from pyrite cinders 总被引:7,自引:0,他引:7
1 INTRODUCTIONPolyferricsulfate (PFS )wassuccessfully pre paredinJapaninthemid 1970sandwasproducedandappliedinindustriesin 1980s .PFSasac 相似文献
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