According to a report on the Russian Science website on February 24, researchers at the Moscow State Institute of Steel and Iron Alloys of the National Research Technical University have developed a new type of vibration sensor for use in building and bridge condition diagnostic instruments and spacecraft. The sensor uses lead-free lithium niobate (LiNbO3) crystal. The research results were published in the magazine "Sensors". Lithium niobate crystals are much more stable than the zirconium-lead titanate ceramics currently used by manufacturers of vibration sensors. The transition to new materials will enable manufacturers to comply with the EU's RoHS directive on gradually phasing out lead. Ilin Kubasov, a researcher at the School of Semiconductors and Dielectric Materials, pointed out that the vibration sensor can be used as a diagnostic device for the condition of buildings and bridges, to detect any dangerous vibrations, so that timely action can be taken to evacuate people. They can also be used in spacecraft and security systems to achieve complete control of the country ’s territorial boundaries. The working principle of the vibration sensor is based on the piezoelectric effect-the piezoelectric element deforms and emits an alarm signal when vibration is applied. So far, sensor manufacturers have encountered many problems when using zirconium-lead titanate ceramic-based piezoelectric elements, which are extremely toxic and lose sensitivity when temperature changes. The researchers believe that all these problems are now completely resolved, because lithium niobate does not contain fine particles like zirconium-lead titanate ceramics. In addition, the performance of lithium niobate is stable over a wide temperature range. Lithium niobate has been known since the middle of the 20th century and is widely used in laser optics, but few people have tried to use it in vibration sensors because its piezoelectric performance is quite weak (approximately less than zirconium-lead titanate ceramics) 10 times worse). Experts at the Moscow State Institute of Iron and Steel Alloys can form a so-called "dual-domain structure" inside lithium niobate, which can increase its sensitivity to external vibrations. The development of new sensors based on single crystal piezoelectric sensors will increase the sensitivity of these products to at least 10-6g, and also significantly expand the operating temperature range. Professional Magnetic Assembly Manufacturer in China. Specialize In Manufacturing Magnetic Window Cleaner, Magnetic Name Badge, Magnetic Sweeper, etc products. Magnetic Assembly Magnetic Window Cleaner,,Magnetic Name Badge,Magnetic Sweeper ,Magnetic Cleaner Ningbo Besten Magnet Co., Ltd. , https://www.bestenmagnets.com