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Current issue

ELEKTRO 7/2018 was released on June 27th 2018. Its digital version will be available on July 27th 2018.

Topic: Cables, conductors and cable engineering; Tools, equipment and accessories for work with cables

Main Article
Parametrization of circuit models of Li-accumulators for electromobility
Smart Cities (part 3 – volume 1)

SVĚTLO (Light) 3/2018 was released on June 15th 2018. Its digital version will be available on July 17th 2018.

Accessories of lighting installations
Evening with Foxtrot on the Czech heaven

Public lighting
Timeless luminaire for public lighting – Streetlight 11
Control of public lighting

Fire alarm wallpaper detects, resists, and warns of house fires

30.03.2018 | Phys.org | www.phys.org

Researchers have designed a “fire alarm wallpaper” made of environmentally friendly, nonflammable materials—including some of the materials found in bone, teeth, and hormones—that can detect a fire, prevent the fire from spreading, and give off an alarm when a fire occurs.

When exposed to heat, the wallpaper is transformed from an electrically insulating state into an electrically conductive one, causing it to automatically trigger an alarm that generates loud sounds and warning lights. The new wallpaper is based on hydroxyapatite, which is the primary inorganic component of bone and teeth.

Fire resistant wallpaper

Although hydroxyapatite is typically brittle and inflexible, in previous work the researchers found that forming ultralong nanowires made of hydroxyapatite gives the material a high flexibility suitable for making wallpaper. In order to make the nonflammable wallpaper a “smart material” capable of automatically sounding an alarm in response to a fire, the researchers incorporated an ink-based thermosensitive sensor onto the wallpaper.

Read more at Phys.org

Image Credit: Shanghai Institute of Ceramics

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