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Most stealth coatings consist of a radar-absorbing material, typically a form of iron, suspended in paint. But they are heavy (which lowers fuel efficiency), need to be reapplied frequently, and don’t absorb all radar frequencies. Ceno Technologies, a particles-science company in Sanborn, New York, has developed a lighter, more durable coating that uses hollow ceramic spheres, called cenospheres. Because the spheres can be covered in carbon, silver or other metals that absorb slightly different wavelengths of radar, the coating can be customized to deceive specific radar systems.
Cenospheres are alumina silicate hollow ceramic particles formed during the production of electricity by coal burning power stations. Also referred to as microspheres, hollow spheres, microballoons, hollow ceramic microspheres or glass beads, they are separated from fly ash by electrostatic and floatation methods and were once thought of as unwanted and difficult waste. Their buoyancy meant they could not be buried as landfill as ground water would push them to the surface, once on the surface and dry they would become persistent airborne dust. Cenospheres are now sought after as an inexpensive, lightweight filler for building products, their spherical shape lends cohesive strength to concrete and polymers, their ceramic composition provides excellent insulation and flame resistance and their lightweight reduces transportation costs.
Cenospheres - silver coatedCeno Technologies use a patented and proprietary process of wet chemistry to coat cenospheres with a thin layer of silver that allowed the finished product to perform like silver in electrical conduction and infra-red reflection AND simultaneously perform like a ceramic in thermal insulation, low cost, low maintenance and ease of use. Silver Coated Cenospheres from Ceno Technologies are extremely reflective and can exhibit an electromagnetic (EMI) shielding effectiveness of 60dB from 100 MHz to 25 GHz and higher.
IR discretion techniques focus on bands II and III which are transmission bands in the Earth’s atmosphere (see Figure 1). Band II covers the range 3 to 5 mm while Band III covers the range 8 to 12 mm. Band II is exploited primarily by missile guidance systems and band III by thermal cameras. Another wavelength of interest is 1.064 mm, which is the wavelength used by the majority of laser range-finders.
The emphasis to date has been on radar stealth, and thus radar-absorbing materials have received significant attention worldwide. However, with the development of more accurate infrared (IR) detection technology such as missile guidance systems and thermal cameras, the dual need for effective IR and Radar stealth capabilities vital for air, land, and sea defenses.
IR Stealth coatings
Low observable coatings render IR detection of an object more difficult. These coatings are multipurpose materials that may be tuned for specific missions, or used in standard configurations. For example, they may be designed solely for IR stealth (without compromising the radar cross section of the host), or for both IR and radar stealth simultaneously.
Ceno Technologies can also produce special infrared reflective materials which are effective from the near to far infrared region. These materials may be incorporated over radar absorbers to yield multi-spectral combination absorbers. Infrared reflective materials are supplied for use in spray-on paints, coatings, adhesives, composites and fabrics. Infrared reflective coatings are as thin as 3 mils and weigh as little as 4 grams per square.
Originally posted by relocator
I don't want to derail the thread but is there a paint that can be used to keep the drones from seeing inside your home?