Technology
Zentek Files Provisional Patent Application for Absorption-Based EMI Shielding Coating Made from Albany Graphite
ZEN-EMI-01 is developed from Albany graphite and preliminary laboratory testing showed that it dissipates electromagnetic energy within the coating rather than reflecting it toward adjacent systemsGuelph, Ontario--(Newsfile Corp. - August 17, 2026) - Zentek Ltd. (TSXV: ZEN) (NASDAQ: ZTEK) ("Zentek" or the "Company") has filed a provisional patent application with the United States Patent and Trademark Office covering ZEN-EMI-01, a water-based electromagnetic interference ("EMI") shielding...
About this update from Zentek Ltd.
ZEN-EMI-01 is developed from Albany graphite and preliminary laboratory testing showed that it dissipates electromagnetic energy within the coating rather than reflecting it toward adjacent systems Guelph, Ontario--(Newsfile Corp. - August 17, 2026) - Zentek Ltd. (TSXV: ZEN) (NASDAQ: ZTEK) ("Zentek" or the "Company") has filed a provisional patent application with the United States Patent and Trademark Office covering ZEN-EMI-01, a water-based electromagnetic interference ("EMI") shielding coating produced from purified graphite from the Company's Albany deposit. The filing establishes a priority date and is the first step in protecting the Company's EMI shielding coating platform. The Interference Problem Electronic systems both emit electromagnetic ("EM") energy and can be disrupted by it. Most people have encountered a version of this. A phone set down beside a speaker produces a buzz, or a radio loses its signal near power lines. In each case, energy from one device is interfering with another. Where electronics are densely packed, the same effect degrades sensor readings, corrupts data, and can take systems offline. EMI shielding is what prevents it. Conventional shielding solves this by reflection, using metal or metal-filled materials to bounce energy away. Reflection works, but the energy has to go somewhere, and in dense installations it can end up disrupting other nearby electronics. How the Coating Works ZEN-EMI-01 absorbs incoming electromagnetic energy inside the coating as a small amount of heat rather than reflecting that energy back into the surrounding environment.1 It does this with a combination of three ingredients: purified graphite from the Albany deposit for electrical conductivity, magnetic ferrite particles to add a magnetic absorbing effect, and a conductive polymer to bind these materials' characteristics together. The finished coating is water-based, meaning that the product should be applicable to a range of surfaces using the same equipment as conventional industrial coatings. Laboratory Results In internal laboratory testing, a layer of ZEN-EMI-01 approximately the thickness of two sheets of paper significantly reduced a band of microwave EM frequencies commonly used in radar and satellite communication.2 Absorption accounted for the majority of the shielding, making the coating potentially suitable for densely designed or e...