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Keyword: piezoelectricity

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  • PRC Espionage Leads to 'Terf' War [re: Terfenol-D]

    10/17/2002 8:57:12 AM PDT · by Stand Watch Listen · 12 replies · 491+ views
    INSIGHT magazine ^ | October 14, 2002 | Scott Wheeler
    President Jiang Zemin gets an update on China´s Terfenol-D project. The U.S. Navy spent millions of dollars to develop Terfenol-D in the early 1980s, and intelligence experts estimate that the People's Republic of China (PRC) has devoted extensive resources to try to steal it. Insight has learned that these PRC efforts have paid off. The spy target is an exotic material made up of two types of rare-earth metals called lanthanides, terbium and dysprosium, plus iron (FE). The NOL stands for Naval Ordnance Laboratory. Hence the name Terfenol-D. Those who have worked with this exotic material call it almost magical....
  • China’s Chokehold on This Obscure Mineral Threatens the West’s Militaries

    06/09/2025 1:10:19 PM PDT · by E. Pluribus Unum · 40 replies
    The New York Times ^ | June 9, 2025, 11:49 a.m. ET | Keith Bradsher
    China produces the entire world’s supply of samarium, a rare earth metal that the United States and its allies need to rebuild inventories of fighter jets, missiles and other hardware.China’s strict controls on the export of heat-resistant magnets made with rare earth minerals have exposed a major vulnerability in the U.S. military supply chain.Without these magnets, the United States and its allies in Europe will struggle to refill recently depleted inventories of military hardware.For more than a decade, the United States has failed to develop an alternative to China’s supply of a specific kind of rare earth crucial for the...
  • Boffins [Scientists] claim discovery of the first piezoelectric liquid

    03/29/2023 3:24:18 AM PDT · by zeestephen · 13 replies
    The Register (via MSN.com) ^ | 28 March 2023 | Brandon Vigliarolo
    [*All currently known Piezoelectric materials are solids. When the solid is compressed or twisted, it releases an electric charge. If the solid is zapped with electricity, the solid changes shape*] - When the liquids were put in a cylinder and compressed with a piston, both generated electricity proportional to the force applied. Blanchard and Hossain placed their liquids in a lens-shaped container. By zapping it with electricity, Blanchard said they were able to change the focal length of the lens.
  • Physicists build circuit that generates clean, limitless power from graphene

    02/21/2022 11:11:46 AM PST · by ShadowAce · 55 replies
    The Brighter Side ^ | 19 February 2022 | Bob Whitby
    FAYETTEVILLE, Ark. – A team of University of Arkansas physicists has successfully developed a circuit capable of capturing graphene's thermal motion and converting it into an electrical current. “An energy-harvesting circuit based on graphene could be incorporated into a chip to provide clean, limitless, low-voltage power for small devices or sensors,” said Paul Thibado, professor of physics and lead researcher in the discovery.The findings, titled "Fluctuation-induced current from freestanding graphene," and published in the journal Physical Review E, are proof of a theory the physicists developed at the U of A three years ago that freestanding graphene — a single...
  • Rare metal improves performance of energy-harvesting piezoelectric crystals

    04/19/2019 7:27:34 AM PDT · by Red Badger · 36 replies
    UPI ^ | April 19, 2019 / 10:16 AM | By Brooks Hays
    Scientists improved the performance of electricity-harvesting crystals by adding the rare earth metal samarium. Photo by Wikimedia Commons ============================================================ April 19 (UPI) -- Researchers have discovered that the addition of a rare earth metal significantly improves the performance of piezoelectric crystals. Piezoelectric crystals are used in sensors, including underwater sonars and medical ultrasound imaging devices. These technologies use perovskite oxide crystals, or PMN-PT crystals. Scientists have also tried to use piezoelectric crystals, which convert mechanical oscillations into electricity, to power wearable electronics and other types of novel technologies. An international team of scientists from Australia, China and the United States...
  • If These US Navy Patents are Made Then We Are in a Star Trek Technology World

    03/09/2019 6:04:55 AM PST · by vannrox · 90 replies
    Next BIG Future ^ | 22FB19 | Brian Wang
    February 22, 2019 |   Salvatore Cezar Pais is a US Navy researcher. Salvatore has three amazing patents that would be incredible breakthroughs in physics if they are true. The least extreme is a patent for Piezoelectricity-Induced Room Temperature Superconductor. The other two patents are gravity wave generator and inertial mass reduction.If these could be realized as technologies then we are talking Star Trek level spaceships. The gravitational wave generator could be used for propellentless propulsion to near the speed of light. Being able to reduce inertia would also mean capabilities which currently seem beyond known physics.The more likely situation...
  • Mysterious Light Associated with Earthquakes Now Linked to Geologic Rift Zones

    01/03/2014 8:34:13 PM PST · by BenLurkin · 21 replies
    scientificamerican.com ^ | January 3, 2014 | Alexandra Witze
    The study, published in the January/February issue of Seismological Research Letters pulls together several strands of research to propose a mechanism by which earthquake lights form. The authors suggest that, during an earthquake, the stress of rocks grinding against each other generates electric charges, which travel upwards along the nearly vertical geological faults that are common in rift zones. When the charges reach Earth's surface and interact with the atmosphere, they create a glow.
  • Scientists say quartz is key to understanding quakes (and more)

    03/16/2011 6:28:17 PM PDT · by decimon · 42 replies
    Reuters ^ | March 16, 2011 | Laura Zuckerman
    SALMON, Idaho (Reuters) – Underground quartz deposits worldwide may be behind earthquakes, mountain building and other continental tectonics, a discovery that may aid in predicting tremblers, according to a study released on Wednesday. The findings by Utah State University geophysicist Anthony Lowry and a colleague at the University of London, to be published Thursday in the journal Nature, may solve a riddle of the ages about the formation and location of earthquake faults, mountains, valleys and plains. "Certainly the question of why mountains occur where they do has been around since the dawn of time," Lowry told Reuters. He and...