{"id":5259,"date":"2022-03-18T13:22:32","date_gmt":"2022-03-18T13:22:32","guid":{"rendered":"https:\/\/www.solids-solutions.com\/?page_id=5259"},"modified":"2022-12-16T14:16:42","modified_gmt":"2022-12-16T14:16:42","slug":"laser-a-diffraction","status":"publish","type":"page","link":"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/laser-a-diffraction\/","title":{"rendered":"Laser \u00e0 diffraction"},"content":{"rendered":"<div class=\"gb-container gb-container-236bbb54\"><div class=\"gb-inside-container\">\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:65%\">\n<p class=\"wp-block-paragraph\">La diffraction laser est la technique la plus appliqu\u00e9e pour l\u2019analyse et la caract\u00e9risation de la taille des particules. La diffraction laser (aussi appel\u00e9e la diffraction statique), forme un pattern obtenu \u00e0 partir de la dispersion de particules dispers\u00e9es dans le rayon laser &nbsp;et contient l\u2019information de la taille des particules et la distribution des granules.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019interaction des particules avec la lumi\u00e8re d\u00e9pend principalement de la taille des particules, leur forme, la rugosit\u00e9 de la surface et les propri\u00e9t\u00e9s optiques comme l\u2019indice de r\u00e9fraction. Selon le mat\u00e9riel, la diffusion de la lumi\u00e8re est unique pour sa taille.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La distribution de taille est obtenue par d\u00e9-convolution de pattern \u00e0 l\u2019aide d\u2019un mod\u00e8le optique \u00e9tant Fraunhofer ou Mie. Le mod\u00e8le Fraunhofer peut \u00eatre utilis\u00e9 sans contraintes pour des tailles au-del\u00e0 de 10 micron. En dessous de 10 micron, le mod\u00e8le Mie est plus pr\u00e9cis mais celui-ci n\u00e9cessite les caract\u00e9ristiques optiques du mat\u00e9riel, l\u2019indice de r\u00e9fraction et le coefficient d\u2019absorption.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La distribution des tailles de particules peut \u00eatre \u00e9valu\u00e9e dans un large \u00e9ventail d\u2019env. 0.02 \u2013 2000 \u03bcm pour des particules dispers\u00e9es en suspension, eau ou organique ou \u00e0 l\u2019\u00e9tat sec en air.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les analyses des particules sont effectu\u00e9es sur une Malvern Mastersizer S ou une Malvern Mastersizer 2000 ou une Coulter LS230 analyseur.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:35%\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"267\" height=\"200\" src=\"https:\/\/www.solids-solutions.com\/wp-content\/uploads\/Light-scattering-techniques.jpg\" alt=\"\" class=\"wp-image-4194\"\/><\/figure>\n\n\n\n<div style=\"height:34px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/granulometrie-par-techniques-de-diffusion-de-la-lumiere\/\">Granulom\u00e9trie par techniques de diffusion de la lumi\u00e8re<\/a><\/li><li><a href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/laser-a-diffraction\/\">Diffraction Laser<\/a><\/li><li><a href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/analyse-de-nano-particules-par-spectroscopie-a-correlation-de-photons-pcs\/\">Analyse de nano particules par spectroscopie \u00e0 corr\u00e9lation de photons (PCS)<\/a><\/li><li><a href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/analyse-des-particules-et-gouttelettes-par-velocimetrie-doppler\/\">Analyse des particules et gouttelettes par V\u00e9locim\u00e9trie Doppler<\/a><\/li><li><a href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/techniques-dimages-pour-caracterisation-des-particules\/\">Techniques d&rsquo;images pour caract\u00e9risation des particules<\/a><\/li><li><a href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/microscopie-electronique\/\">Microscopie \u00e9lectronique<\/a><\/li><li><a href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/autres-techniques-pour-caracterisation-des-particules\/\">Autres techniques pour caract\u00e9risation des particules<\/a><\/li><\/ul>\n<\/div>\n<\/div>\n\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>La diffraction laser est la technique la plus appliqu\u00e9e pour l\u2019analyse et la caract\u00e9risation de la taille des particules. La diffraction laser (aussi appel\u00e9e la diffraction statique), forme un pattern obtenu \u00e0 partir de la dispersion de particules dispers\u00e9es dans le rayon laser &nbsp;et contient l\u2019information de la taille des &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Laser \u00e0 diffraction\" class=\"read-more button\" href=\"https:\/\/www.solids-solutions.com\/fr\/rd\/analyse-granulometrique-taille-et-forme-des-particules\/laser-a-diffraction\/#more-5259\" aria-label=\"En savoir plus sur Laser \u00e0 diffraction\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":5249,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5259","page","type-page","status-publish"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Analyse de la taille des particules par diffraction laser en notre 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