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Effect of magnetic field intensity and gamma-Fe2O3 nanoparticle additive on electrical conductivity and viscosity of magnetorheological carbonyl iron suspension-based membranes

機(jī)譯：磁場(chǎng)強(qiáng)度和γ-Fe2O3納米粒子添加劑對(duì)磁流變羰基懸浮膜的電導(dǎo)率和粘度的影響

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摘要

Smart membranes based on an absorbent cloth microfiber material and silicone oil were prepared using a fixed volume concentration of carbonyl iron and various volume concentrations of gamma-Fe2O3 additive nanoparticles. The membranes were then used to manufacture magnetoresistors, whose resistance was measured under an applied magnetic field with a magnetic flux density up to 250 mT. The electrical conductivity and viscosity of the membranes increased with increasing magnetic field intensity, while at a fixed magnetic field strength, the electrical conductivity and viscosity decreased with increasing gamma-Fe2O3 concentration. A theoretical model to explain these results was developed further in the framework of a dipolar approximation.
機(jī)譯：使用固定體積濃度的羰基鐵和各種體積濃度的γ-Fe2O3添加劑納米顆粒制備硅油的智能膜和硅油。 然后使用膜制造磁阻器，其電阻在施加的磁場(chǎng)下測(cè)量，磁通密度高達(dá)250mT。 膜的電導(dǎo)率和粘度隨著磁場(chǎng)強(qiáng)度的增加而增加，而在固定磁場(chǎng)強(qiáng)度下，電導(dǎo)率和粘度隨著γ-Fe2O3濃度的增加而降低。 解釋這些結(jié)果的理論模型進(jìn)一步在雙極近似的框架中開(kāi)發(fā)。

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