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3D Printing Magnetic Material with Arbitrary Anisotropy

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A process for 3D printing of magnetic materials with programmatically controlled anisotropy is presented. Using an experimental thermal inkjet printer magnetic structures with and without anisotropy are printed and characterized to demonstrate the unique advantage afforded by inkjet printing – that of arbitrarily controlling the anisotropy orientation within the structure during printing. The technique will make possible 3D printed inductor and transformer cores with low losses, antenna loading materials and graded index lenses for processing microwave signals, and magnetic field sensors to name a few applications.

In the inkjet printing technique presented here, a magnetic ink composed of magnetic nanoparticles in a UV curable resin is jetted on the substrate. The nanoparticles are then aligned in a magnetic field generated using a two-axis electromagnet and the ink cured to obtain a composite with the desired magnetic anisotropy. The process is repeated to fabricate a 3D structure of the desired shape and dimensions.
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Document Type: Research Article

Publication date: January 1, 2015

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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