Buletin Oktober 2013

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Rubrik

Sophisticaded

Ferrofluid is a stable colloidal Ferrofluid: Magnetic Liquid s u s p e n s i o n o f s u b - d o m a i n magnetic particles in a liquid carrier. Technology The particles, which have an average size of about 100Ă… (10 Magnetic Behavior of Ferrofluid nm), are coated with a stabilizing Ferrofluid Properties and Their dispersing agent (surfactant) which prevents particle agglomeration Application even when a strong magnetic field Characteristics of Ferrofluid that gradient is applied to the ferrofluid.

Affect Performance Ferrofluid Today

The surfactant must be matched to the carrier type and must overcome the attractive van der Waals and magnetic forces between the particles. The colloid and thermal stabilities, crucial to many applications, are greatly influenced by the choice of the surfactant. A typical ferrofluid may contain by volume 5% magnetic solid, 10% surfactant and 85% carrier. Magnetic Behavior of Ferrofluid In the absence of a magnetic field, the magnetic moments of the particles are randomly distributed and the fluid has no net magnetization When a magnetic field is applied to a ferrofluid, the magnetic moments of the particles orient along the field lines almost instantly.

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Buletin MTM edisi Oktober 2013

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