Piezoelectric Generators

Latest News for: Piezoelectric generators

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Ultrahigh piezoelectric performance demonstrated in ceramic materials

Phys Dot Org 18 May 2022

"There are many mechanisms that limit the magnitude of piezoelectricity in polycrystalline ceramic materials ... What factors control the magnitude of piezoelectric constant? The piezoelectric constant is the charge generated by a unit of applied force, picocoulomb per Newton, which in turn is dependent on effects occurring at atomic to mesoscale.

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Researchers Develop a Paper-Thin Loudspeaker

Slashdot 28 Apr 2022

By contrast, the new loudspeaker simplifies the speaker design by using a thin film of a shaped piezoelectric material that moves when voltage is applied over it, which moves the air above it and generates sound ... By contrast, an average home speaker might consume more than 1 watt of power to generate similar sound pressure at a comparable distance.

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Smartwaches could be self-charging pretty soon

Technology Org 26 Apr 2022

This material generates electricity when pressure is applied to it ... This may not sound like a lot of power, but it is twice as much as the most powerful type of existing piezoelectric generator ... Currently they are too power-hungry and those piezoelectric generators need major advancements as well.

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Smartwatches could be self-charging pretty soon

Technology Org 26 Apr 2022

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Self-charging smartwatches and health trackers could be a step closer after British engineers develop tiny ...

The Daily Mail 26 Apr 2022

Engineers from the University of Edinburgh have developed a new technique to generate electricity by harnessing energy produced by movement of the human body ... Tests of the devices' power output show they can produce 40 microwatts of electricity per square centimetre – twice as much as the most powerful type of existing piezoelectric generator.

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Global Acoustic Wave Sensors Market to Reach $900.9 Million by 2026

Longview News-Journal 18 Apr 2022

... in new and next generation applications ... Relying on the concept of Piezoelectricity, i.e., the generation of electrical charges by inducing mechanical stress through a reciprocal mechanism, acoustic wave sensors leverage the piezoelectric material to produce the acoustic wave.

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Brick by brick: Students’ policy ideas to help refugees make their way to the real UN

Reliefweb 04 Apr 2022

University students affiliated with MOVENU, Venezuela’s Model UN initiative, recommended installing piezoelectric walkways in refugee camps, which would generate electricity using friction and the weight of the people on the walkway.

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The science of becoming "interplanetary": how can humans live on Jupiter's moons?

Interesting Engineering 04 Apr 2022

Turbines placed around these vents would be able to use the moving water to generate electricity and possibly absorb the heat and chemical energy too. A more adventurous possibility would be to position piezoelectric devices inside the moons to convert tidal flexing into electricity.

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Enhancing the electromechanical behavior of a flexible polymer

Phys Dot Org 24 Mar 2022

Zhang and a Penn State-led team of interdisciplinary researchers developed a polymer with robust piezoelectric effectiveness, resulting in 60% more efficient electricity generation than previous iterations ... "The efficiency of the polymer's electricity generation was vastly increased," Zhang said.

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NIST discovery could increase accuracy in measuring blood flow for cancer diagnosis, other applications

Phys Dot Org 23 Mar 2022

To measure the properties of a microfluid blood sample, researchers use ultrasound waves of a known frequency and energy, generated just beneath the bottom wall of the vessel by a piezoelectric crystal, a material that can convert the flow of electricity to acoustic waves ... Acoustic waves can also sort cells in whole blood ... Explore further ... DOI ... ....

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Gliders With Ears: A New Tool in China's Subsea Surveillance Toolbox

The Maritime Executive 21 Mar 2022

Scientists and engineers based in the People’s Republic of China (PRC) are also developing a new generation of gliders that could play a far more direct role in naval combat by detecting enemy submarines ... China is very keen on pursuing a new generation of piezoelectric vector sensors, which are far smaller than previous types.

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This wearable fabric microphone can listen to the world—and your body

Popular Science 16 Mar 2022

Key to the researchers’ design is a thread that’s laced with piezoelectric polymer and nanoparticles. Both these materials can generate electric charge when they are deformed, such as under the onslaught of vibrations from the environment.

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World Hearing Day: How a young Emirati mum has tuned in to the world

Gulf News 03 Mar 2022

Piezoelectricity, the ability of certain materials to generate an AC (alternating current) voltage when subjected to mechanical stress or vibration, has been used for years in microphones, high-end speakers and medical equipment, but this is the first time it has been used in hearing implants here, the doctor said.

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Transparent ultrasound chip improves cell stimulation and imaging

Phys Dot Org 24 Feb 2022

"This was a complex setup that didn't provide reproducible results ... Kothapalli and his collaborators miniaturized the ultrasound stimulation setup by creating a transparent transducer platform made of a piezoelectric lithium niobate material. Piezoelectric materials generate mechanical energy when electric voltage is applied ... Explore further ... DOI ... ....

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Electric KNEE implants could be the answer for millions of arthritis sufferers after scientists find ...

The Daily Mail 13 Jan 2022

Bioengineers in Connecticut have developed a tiny mesh implant, about half a millimetre thick, which generates tiny electrical currents when it feels pressure – a property known as piezoelectricity ... WHAT IS PIEZOELECTRICITY?. The ability to generate electricity by applying pressure to a material is called piezoelectricity.