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Ultralight Monolithic Magnetite Aerogel by Nir Ganonyan; Jin He; Alice Temkin; Israel Felner; Raz Gvishi; David Avnir is a Engineering article available to read on EtoBox.

What is Ultralight Monolithic Magnetite Aerogel about?

We report the successful synthesis of magnetite aerogel, which has been a long-standing un-resolved challenge in magnetic materials and in aerogel materials. It is the first purely magnetic oxide-ceramic aerogel. So far, a leading approach in inducing magnetic properties in aerogels has been the dispersion of magnetic particles in various aerogel supports. This new aerogel has an ultralow density of 55 mg/mL, containing up to 98.7% air. The synthetic challenge required careful tailoring of the various steps, from the magnetite sol, through the gel, and up to the final aerogel. The rationale behind the various synthetic modifications is described in detail. We find that the ability to form monoliths is associated with dual porosity of the aerogel – interstitial microporosity of small magnetite aggregates that build the walls of the material, along with the wide macropores, typical of aerogels. Detailed mechanistic description is provided, along with intensive characterization of the material properties, the superparamagnetic properties, and more. Modifications of the magnetite are described, such as control of its density, mechanical reinforcement with glass fibers and inducing anis

Who reads Ultralight Monolithic Magnetite Aerogel?

Author

Nir Ganonyan; Jin He; Alice Temkin; Israel Felner; Raz Gvishi; David Avnir

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)