{"id":20269,"date":"2020-03-22T17:54:32","date_gmt":"2020-03-22T16:54:32","guid":{"rendered":"https:\/\/www.fisa.com\/?p=20269"},"modified":"2020-03-22T17:54:32","modified_gmt":"2020-03-22T16:54:32","slug":"what-is-the-difference-between-magnetoelastic-piezoelectric-and-multi-frequency-ultrasound","status":"publish","type":"post","link":"https:\/\/www.fisa.com\/pl\/what-is-the-difference-between-magnetoelastic-piezoelectric-and-multi-frequency-ultrasound\/","title":{"rendered":"What is the difference between magnetoelastic, piezoelectric and multi-frequency ultrasound?"},"content":{"rendered":"<p>Its basic principle makes <strong>magnetoelastic ultrasound<\/strong> is one of the oldest ultrasound technologies. However, in the past it was very inefficient.<\/p>\n<p><strong>Piezoelectricity<\/strong> was discovered later and this is very cheap and is also imported cheaply from Asia. This explains why many manufacturers turned to piezoelectricity.<\/p>\n<p><!--more--><\/p>\n<h2>Magnetoelastic ultrasound<\/h2>\n<div id=\"attachment_20234\" class=\"wp-caption aligncenter\" style=\"width: 812px\"><img decoding=\"async\" class=\"lazy wp-image-20234 size-full\" src=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound4.jpg\" alt=\"nous avons des installations de nettoyage par ultrasons magn\u00e9tostrictifs qui fonctionnent depuis 20 ans sans probl\u00e8me\" width=\"812\" height=\"720\" srcset=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound4.jpg 812w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound4-300x266.jpg 300w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound4-768x681.jpg 768w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound4-90x80.jpg 90w\" sizes=\"(max-width: 812px) 100vw, 812px\" \/><p class=\"wp-caption-text\">We have magnetoelastic ultrasonic cleaning systems that have been operating for 20 years without problems<\/p><\/div>\n<div class=\"su-spacer\" style=\"height:40px\"><\/div>\n<p>However, we continued to work on magnetoelastic ultrasound, and we developed our <strong>Magnasonic<\/strong> ultrasound. It is much more efficient and above all, it almost never wears out, unlike piezoelectric emitters.<\/p>\n<p>As a result, we have magnetoelastic ultrasonic cleaning systems that have been <strong>operating for 20\u00a0years without problems<\/strong>, and which still work today with the original ultrasonic emitter.<\/p>\n<p>This is not possible with piezoelectric technology. In this field, <strong>the life span of emitters is generally between 4000 and 6000 hours<\/strong>.<\/p>\n<p>This means that emitters have to be changed every one or two years, which does not apply to our magnetoelastic technology.<\/p>\n<h2>But you also use piezoelectricity<\/h2>\n<p>Yes, we use this technology when there are frequency requirements.<\/p>\n<p>For example, in the <a href=\"https:\/\/www.fisa.com\/fr\/nettoyage-par-ultrasons-tous-milieux\/industrie-aeronautique-aerospatiale\/\">component cleaning<\/a> sector, we have machines that operate with multi-frequency or piezoelectric ultrasound. But magnetoelastic technology is better suited for cleaning molds and tools.<\/p>\n<p>First of all, the <strong>temperatures for cleaning components are much lower:<\/strong><\/p>\n<ul>\n<li>When cleaning molds, temperatures go up to 95\u00a0degrees,<\/li>\n<li>whereas components are usually cleaned at temperature of 40 to 50\u00a0degrees.<\/li>\n<\/ul>\n<p>The problem with piezoelectric emitters is that they deteriorate very quickly at high temperatures.<\/p>\n<p>A magnetoelastic ultrasonic system can be used above 100 degrees and still would not wear out. Long operating times are also possible with magnetoelastic ultrasound.<\/p>\n<div class=\"su-spacer\" style=\"height:20px\"><\/div>\n<div id=\"attachment_20241\" class=\"wp-caption aligncenter\" style=\"width: 626px\"><img decoding=\"async\" class=\"lazy wp-image-20241 size-full\" src=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound3.jpg\" alt=\"So we have very different operating times and temperatures in different sectors\" width=\"626\" height=\"720\" srcset=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound3.jpg 626w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound3-261x300.jpg 261w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound3-78x90.jpg 78w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><p class=\"wp-caption-text\">So we have very different operating times and temperatures in different sectors<\/p><\/div>\n<div class=\"su-spacer\" style=\"height:40px\"><\/div>\n<p>If you clean a <a href=\"https:\/\/www.fisa.com\/fr\/nettoyage-par-ultrasons-tous-milieux\/instruments-materiel-medical\/\">medical part<\/a>, you may wash it for up to<strong> two or three minutes<\/strong>. If you are cleaning a permanent mold used in a <a href=\"https:\/\/www.fisa.com\/fr\/nettoyage-par-ultrasons-tous-milieux\/fonderie-sous-pression-basse-pression-boite-a-noyaux\/\">foundry<\/a>, it may take up to an hour.<\/p>\n<p>So we have very different operating times and temperatures in different sectors.<\/p>\n<h2>So magnetoelastic technology has many advantages for mold cleaning. It can be used at high temperatures and for long operating periods without the emitter wearing out. Are there any other advantages? What makes magnetoelastic ultrasonic cleaning especially suitable for molds and tools?<\/h2>\n<p>Magnetoelastic ultrasound uses <strong>very low frequency ultrasound<\/strong>. In general, the ultrasound frequency range in the tanks is between 18 and 20\u00a0kHz.<\/p>\n<p><strong>In addition\u2009\u2013\u2009and this is also important\u2009\u2013\u2009we modulate the frequency continually between 18 and 20\u00a0kHz. This means we don\u2019t generate standing waves<\/strong>.<\/p>\n<div class=\"su-spacer\" style=\"height:20px\"><\/div>\n<div id=\"attachment_20248\" class=\"wp-caption aligncenter\" style=\"width: 451px\"><img decoding=\"async\" class=\"lazy wp-image-20248 size-full\" src=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound2.jpg\" alt=\"Magnetoelastic ultrasound uses very low frequency ultrasound\" width=\"451\" height=\"720\" srcset=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound2.jpg 451w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound2-188x300.jpg 188w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound2-56x90.jpg 56w\" sizes=\"(max-width: 451px) 100vw, 451px\" \/><p class=\"wp-caption-text\">Magnetoelastic ultrasound uses very low frequency ultrasound<\/p><\/div>\n<div class=\"su-spacer\" style=\"height:20px\"><\/div>\n<h3>Standing waves<\/h3>\n<p>A standing wave is like a sine wave, which starts from a point A and goes to a point B. It will always arrive at the same point\u2009\u2013\u2009and that is precisely what we want to avoid.<\/p>\n<p>I\u2019ll give you an example: If you rub a diamond with a piece of wood, people will tell you that nothing can happen.<\/p>\n<p>But if I always rub my piece of wood in the same place on the diamond, at some point I\u2019ll end up noticing wear.<\/p>\n<p>Standing waves cause <strong>cavitation damage<\/strong>. Surfaces are eroded.<\/p>\n<p>To avoid this, we modulate the Magnasonic ultrasound frequency between 18 and 20 kHz.<\/p>\n<div class=\"su-spacer\" style=\"height:20px\"><\/div>\n<div id=\"attachment_20255\" class=\"wp-caption aligncenter\" style=\"width: 675px\"><img decoding=\"async\" class=\"lazy wp-image-20255 size-full\" src=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound1.jpg\" alt=\"Standing waves cause cavitation damage\" width=\"675\" height=\"720\" srcset=\"https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound1.jpg 675w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound1-281x300.jpg 281w, https:\/\/www.fisa.com\/wp-content\/uploads\/2020\/03\/ultrasound1-84x90.jpg 84w\" sizes=\"(max-width: 675px) 100vw, 675px\" \/><p class=\"wp-caption-text\">Standing waves cause cavitation damage<\/p><\/div>\n<div class=\"su-spacer\" style=\"height:20px\"><\/div>\n<h3>Very large bubbles for thorough cleaning of heavily soiled surfaces<\/h3>\n<p>The low frequency also has another advantage: because we are using very low frequencies, we generate very large bubbles.<\/p>\n<p>What does a large bubble mean? A large bubble contains a lot of energy. These bubbles appear in the liquid and when they meet the surface, they implode, forming <strong>very violent liquid micro-jets that scrape off the dirt<\/strong>.<\/p>\n<p>Using higher frequencies generates smaller bubbles and they are less efficient for cleaning. Because we have large bubbles, we can <strong>clean heavily soiled surfaces relatively well<\/strong>.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Its basic principle makes <strong>magnetoelastic ultrasound<\/strong> is one of the oldest ultrasound technologies. However, in the past it was very inefficient.<\/p>\n<p><strong>Piezoelectricity<\/strong> was discovered later and this is very cheap and is also imported cheaply from Asia. This explains why many manufacturers turned to piezoelectricity.<\/p>\n","protected":false},"author":3,"featured_media":18947,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Difference between magnetoelastic, piezoelectric and multi-frequency ultrasound<\/title>\n<meta name=\"description\" content=\"Its basic principle makes magnetoelastic ultrasound is one of the oldest ultrasound technologies. However, in the past it was very inefficient. 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