{"id":14849,"date":"2024-12-04T07:37:51","date_gmt":"2024-12-04T07:37:51","guid":{"rendered":"https:\/\/www.epicmicron.com\/?p=14849"},"modified":"2024-12-17T08:02:31","modified_gmt":"2024-12-17T08:02:31","slug":"spherical-silicon-powder-14-proven-methods-to-achieve-the-perfect-shape","status":"publish","type":"post","link":"https:\/\/www.epicmicron.com\/fr\/spherical-silicon-powder-14-proven-methods-to-achieve-the-perfect-shape\/","title":{"rendered":"Poudre de silicium sph\u00e9rique : 14 m\u00e9thodes \u00e9prouv\u00e9es pour obtenir la forme parfaite"},"content":{"rendered":"<p>La poudre de silicium sph\u00e9rique est un mat\u00e9riau essentiel dans de nombreuses industries, pris\u00e9 pour ses propri\u00e9t\u00e9s et ses applications uniques. Sa production implique de multiples techniques class\u00e9es en m\u00e9thodes physiques et m\u00e9thodes chimiques. Cela d\u00e9pend si une transformation chimique se produit au cours du processus.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quelles sont les m\u00e9thodes de production de poudre de silicium sph\u00e9rique ?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>M\u00e9thodes physiques :<\/strong><\/h3>\n\n\n\n<p>Ces m\u00e9thodes n&#039;impliquent pas de r\u00e9actions chimiques. Elles incluent des techniques telles que : le broyage m\u00e9canique \u00e0 billes, la pulv\u00e9risation, la sph\u00e9ro\u00efdisation \u00e0 la flamme, le traitement au plasma, la sph\u00e9ro\u00efdisation par calcination \u00e0 haute temp\u00e9rature.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>M\u00e9thodes chimiques :<\/strong><\/h3>\n\n\n\n<p>Il s&#039;agit de transformations chimiques et notamment : la m\u00e9thode en phase gazeuse, la m\u00e9thode de pr\u00e9cipitation, la synth\u00e8se hydrothermale, le proc\u00e9d\u00e9 sol-gel et la m\u00e9thode de micro\u00e9mulsion.<\/p>\n\n\n\n<p>Ce guide explore 14 m\u00e9thodes de pr\u00e9paration qui garantissent la pr\u00e9cision dans l&#039;obtention de la forme sph\u00e9rique souhait\u00e9e.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"742\" height=\"300\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/0001-1.webp\" alt=\"\" class=\"wp-image-14851\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/0001-1.webp 742w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/0001-1-300x121.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/0001-1-18x7.webp 18w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/0001-1-600x243.webp 600w\" sizes=\"(max-width: 742px) 100vw, 742px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">Proc\u00e9d\u00e9 de production de micropoudre de silicium sph\u00e9rique<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">01 M\u00e9thode de meulage m\u00e9canique<\/h2>\n\n\n\n<p>Le broyage m\u00e9canique utilise des \u00e9quipements de concassage professionnels et des \u00e9quipements de criblage auxiliaires pour produire des poudres ultrafines. Selon l&#039;\u00e9tat du mat\u00e9riau, il existe un broyage \u00e0 sec et un broyage humide. Le broyage humide utilise l&#039;eau comme support et les particules sont broy\u00e9es par agitation et broyage. Cela permet de produire des produits ultrafins avec une bonne dispersion et une taille de particule uniforme.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">02 M\u00e9thode de pulv\u00e9risation<\/h2>\n\n\n\n<p>Le s\u00e9chage par atomisation est une m\u00e9thode d&#039;obtention d&#039;\u00e9chantillons par s\u00e9chage rapide de mati\u00e8res premi\u00e8res liquides \u00e0 l&#039;aide d&#039;un s\u00e9choir \u00e0 atomisation. Les mati\u00e8res premi\u00e8res liquides passent \u00e0 travers un atomiseur pour former des gouttelettes extr\u00eamement fines. Les gouttelettes entrent en contact avec l&#039;air chaud et l&#039;humidit\u00e9 interne migre vers l&#039;ext\u00e9rieur. Les particules de mati\u00e8re premi\u00e8re s&#039;agglom\u00e8rent. Apr\u00e8s s\u00e9chage, on peut obtenir le produit souhait\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">03 M\u00e9thode de sph\u00e9ro\u00efdisation \u00e0 la flamme<\/h2>\n\n\n\n<p>Sous 1600-2000\u2103, les bords de la surface de la poudre fondent progressivement. Une sph\u00e8re se forme sous l&#039;action de la tension superficielle. La poudre de quartz ordinaire est utilis\u00e9e comme mati\u00e8re premi\u00e8re, la micropoudre de silicium sph\u00e9rique est pr\u00e9par\u00e9e par la m\u00e9thode de la flamme oxyg\u00e8ne-ac\u00e9tyl\u00e8ne. Cela peut garantir que sa surface est lisse et que le taux de sph\u00e9ro\u00efdisation atteint 95%.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">04 M\u00e9thode de fusion \u00e0 la flamme<\/h2>\n\n\n\n<p>En utilisant la micropoudre de silicium angulaire comme mati\u00e8re premi\u00e8re, nous broyons, tamisons, purifions et effectuons d&#039;autres pr\u00e9traitements. Un broyeur \u00e0 flux d&#039;air broie la micropoudre de silicium angulaire. Apr\u00e8s un pr\u00e9traitement en plusieurs \u00e9tapes, nous la tamisons pour obtenir une taille de particule appropri\u00e9e. Nous utilisons de l&#039;ac\u00e9tyl\u00e8ne, du gaz naturel et d&#039;autres gaz comme source de chaleur pour faire fondre la poudre, et la flamme reste propre et sans pollution. Une flamme \u00e0 haute temp\u00e9rature fait fondre instantan\u00e9ment la micropoudre de silicium angulaire de taille de particule appropri\u00e9e, et nous la refroidissons rapidement pour la sph\u00e9ro\u00efdiser. Nous obtenons une micropoudre de silicium sph\u00e9rique de haute puret\u00e9 et de taille de particule uniforme.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">05 M\u00e9thode plasma<\/h2>\n\n\n\n<p>La m\u00e9thode plasma utilise la temp\u00e9rature \u00e9lev\u00e9e g\u00e9n\u00e9r\u00e9e par le <a href=\"https:\/\/en.wikipedia.org\/wiki\/Plasma_arc_welding\">plasma \u00e0 arc<\/a>. Il fait fondre la poudre de dioxyde de silicium ou de quartz en gouttelettes. Celles-ci sont sph\u00e9ro\u00efdis\u00e9es sous l&#039;action de la tension superficielle et refroidies pour former des particules sph\u00e9riques de dioxyde de silicium.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">06 M\u00e9thode de sph\u00e9ro\u00efdisation par calcination \u00e0 haute temp\u00e9rature<\/h2>\n\n\n\n<p>La m\u00e9thode de sph\u00e9ro\u00efdisation par calcination \u00e0 haute temp\u00e9rature consiste \u00e0 faire vieillir la poudre de minerai de quartz naturel s\u00e9lectionn\u00e9e dans des conditions alcalines, puis \u00e0 la filtrer. Le mat\u00e9riau filtrant est d\u00e9shydrat\u00e9 et s\u00e9ch\u00e9, un liant est ajout\u00e9 pour obtenir un \u00e9chantillon en bloc, puis calcin\u00e9 dans un four \u00e0 haute temp\u00e9rature, refroidi puis dispers\u00e9, par broyage, sph\u00e9ro\u00efdisation, s\u00e9paration magn\u00e9tique et classification par s\u00e9paration d&#039;air. Enfin, des poudres de silicium sph\u00e9riques ultrafines de haute puret\u00e9 sont fabriqu\u00e9es. Le produit obtenu par cette m\u00e9thode pr\u00e9sente un taux de sph\u00e9ro\u00efdisation \u00e9lev\u00e9, une bonne blancheur, une grande puret\u00e9, une bonne fluidit\u00e9 et une bonne dispersibilit\u00e9. Cependant, il est encore au stade du laboratoire.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">07 M\u00e9thode de combustion directe<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"795\" height=\"341\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Spherical-silicon.webp\" alt=\"\" class=\"wp-image-14852\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Spherical-silicon.webp 795w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Spherical-silicon-300x129.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Spherical-silicon-768x329.webp 768w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Spherical-silicon-18x8.webp 18w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Spherical-silicon-600x257.webp 600w\" sizes=\"(max-width: 795px) 100vw, 795px\" \/><\/figure>\n\n\n\n<p>Le silicium sph\u00e9rique fondu \u00e0 la flamme \u00e9tant une poudre min\u00e9rale naturelle obtenue par sph\u00e9ro\u00efdisation, il existe certaines limites en termes de puret\u00e9 et de distribution granulom\u00e9trique. Quelques grandes entreprises \u00e9trang\u00e8res utilisent la m\u00e9thode de pr\u00e9paration par combustion directe (VMC). Il s&#039;agit de pr\u00e9parer des microsph\u00e8res de dioxyde de silicium de haute puret\u00e9, de petite taille de particules et de distribution granulom\u00e9trique relativement contr\u00f4lable par la r\u00e9action directe de la poudre de silicium m\u00e9tallique avec l&#039;oxyg\u00e8ne.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">08 M\u00e9thode de projection de mati\u00e8re fondue \u00e0 haute temp\u00e9rature<\/h2>\n\n\n\n<p>La m\u00e9thode de pulv\u00e9risation de fusion \u00e0 haute temp\u00e9rature consiste \u00e0 faire fondre du quartz de haute puret\u00e9 en liquide \u00e0 2100-2500 \u2103 et \u00e0 obtenir de la micropoudre de silicium sph\u00e9rique apr\u00e8s pulv\u00e9risation et refroidissement. La surface du produit est lisse et le taux de sph\u00e9ro\u00efdisation et le taux amorphe peuvent atteindre 100%. Certains fabricants aux \u00c9tats-Unis et au Japon utilisent cette m\u00e9thode pour produire de la micropoudre de silicium sph\u00e9rique. Mais elle est strictement confidentielle \u00e0 l&#039;ext\u00e9rieur. La m\u00e9thode de pulv\u00e9risation de fusion \u00e0 haute temp\u00e9rature est facile \u00e0 garantir le taux de sph\u00e9ro\u00efdisation et le taux amorphe, mais la difficult\u00e9 de cette technologie est le syst\u00e8me d&#039;atomisation des mat\u00e9riaux \u00e0 haute temp\u00e9rature, le liquide fondu de quartz visqueux, le r\u00e9glage de la taille des particules d&#039;atomisation et la r\u00e9solution de probl\u00e8mes tels que la pr\u00e9vention de la pollution et une purification suppl\u00e9mentaire.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">09 M\u00e9thode de combustion auto-propag\u00e9e \u00e0 basse temp\u00e9rature<\/h2>\n\n\n\n<p>Le proc\u00e9d\u00e9 de combustion \u00e0 basse temp\u00e9rature auto-propag\u00e9e comprend la pr\u00e9paration du silicate de sodium, la pr\u00e9paration du sol de silicate, la pr\u00e9paration du liquide de combustion mixte, la r\u00e9action de combustion, le recuit et la d\u00e9carbonatation, le traitement de lavage et d&#039;autres \u00e9tapes. L&#039;avantage de cette m\u00e9thode est qu&#039;elle utilise de la micropoudre de silicium cristallin naturel ou de la micropoudre de silicium fondu comme mati\u00e8re premi\u00e8re. Celle-ci est facile \u00e0 obtenir. Le proc\u00e9d\u00e9 est simple, aucun \u00e9quipement sp\u00e9cial, le fonctionnement est facile \u00e0 contr\u00f4ler et le co\u00fbt de production est faible. Les mat\u00e9riaux utilis\u00e9s dans le processus de production ne contiennent que des ions sodium et des ions nitrate qui sont tr\u00e8s solubles dans l&#039;eau, et aucun autre ion impuret\u00e9 n&#039;est introduit, ce qui est propice \u00e0 la pr\u00e9paration de micropoudre de silicium de haute puret\u00e9. \u00c0 l&#039;heure actuelle, cette m\u00e9thode n&#039;en est qu&#039;au stade du laboratoire et ne peut pas \u00eatre bien produite en s\u00e9rie.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">10 M\u00e9thode en phase gazeuse<\/h2>\n\n\n\n<p>Le processus de production utilise des mat\u00e9riaux qui ne contiennent que des ions sodium et des ions nitrate, qui sont tr\u00e8s solubles dans l&#039;eau, et nous n&#039;introduisons aucun autre ion impuret\u00e9. Cette approche est propice \u00e0 la pr\u00e9paration de micropoudres de silicium de haute puret\u00e9. Actuellement, cette m\u00e9thode n&#039;en est qu&#039;au stade du laboratoire et nous ne pouvons pas encore la produire efficacement en masse.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">11 M\u00e9thode de pr\u00e9cipitation<\/h2>\n\n\n\n<p>Nous utilisons du verre soluble, un acidifiant et d&#039;autres mati\u00e8res premi\u00e8res, en ajoutant une quantit\u00e9 appropri\u00e9e de tensioactif. Nous pr\u00eatons une attention particuli\u00e8re au contr\u00f4le de la temp\u00e9rature tout au long du processus de pr\u00e9paration. Si la valeur du pH d\u00e9passe 8, nous ajoutons un stabilisant. Apr\u00e8s lavage, s\u00e9chage et calcination, nous formons une micropoudre de silicium sph\u00e9rique. La micropoudre de silicium sph\u00e9rique pr\u00e9par\u00e9e par cette m\u00e9thode a une granulom\u00e9trie tr\u00e8s uniforme, un faible co\u00fbt, un flux de processus simple et est facile \u00e0 contr\u00f4ler. Nous pouvons l&#039;utiliser dans la production industrielle, mais le d\u00e9faut est qu&#039;elle peut s&#039;agglom\u00e9rer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">12 M\u00e9thode de synth\u00e8se hydrothermale<\/h2>\n\n\n\n<p>Nous utilisons largement la m\u00e9thode de synth\u00e8se hydrothermale pour pr\u00e9parer des nanoparticules en phase liquide. En g\u00e9n\u00e9ral, nous combinons des compos\u00e9s inorganiques et organiques avec de l&#039;eau dans des conditions de temp\u00e9rature et de pression \u00e9lev\u00e9es de 150 \u2103 \u00e0 350 \u2103. Nous laissons les ions, les mol\u00e9cules, les amas d&#039;ions, etc., p\u00e9n\u00e9trer dans la zone de croissance avec des cristaux de germination par forte convection, et finalement, nous obtenons une solution sursatur\u00e9e et des cristaux. La filtration, le lavage et le s\u00e9chage des substances inorganiques peuvent former des microparticules ultrafines et de haute puret\u00e9. L&#039;utilisation de la m\u00e9thode de synth\u00e8se hydrothermale pour pr\u00e9parer la micropoudre de silicium sph\u00e9rique \u00e9limine le processus de conversion en oxydes requis par les m\u00e9thodes g\u00e9n\u00e9rales de synth\u00e8se en phase liquide, ce qui r\u00e9duit la probabilit\u00e9 d&#039;agglom\u00e9ration dure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">13 M\u00e9thode sol-gel<\/h2>\n\n\n\n<p>La m\u00e9thode sol-gel consiste \u00e0 m\u00e9langer uniform\u00e9ment les mati\u00e8res premi\u00e8res avec la phase liquide, \u00e0 les hydrolyser dans certaines conditions, \u00e0 former un sol par condensation chimique et \u00e0 former un gel de silice avec une structure en r\u00e9seau tridimensionnel apr\u00e8s un certain temps. Apr\u00e8s filtration, lavage, s\u00e9chage et frittage, on peut obtenir des nanoparticules de dioxyde de silicium ou de nanoparticules de quartz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">14 M\u00e9thode de la micro\u00e9mulsion<\/h2>\n\n\n\n<p>La micro\u00e9mulsion est une m\u00e9thode dans laquelle deux phases incompatibles forment une \u00e9mulsion uniforme sous l&#039;action d&#039;un tensioactif. Cette m\u00e9thode utilise le minuscule espace entre les deux phases pour former des noyaux sous le guidage d&#039;une source de silicium et obtient des particules sph\u00e9riques de silice ou de quartz apr\u00e8s traitement thermique. En raison de l&#039;espace limit\u00e9 pour la nucl\u00e9ation et la croissance, les particules de silice g\u00e9n\u00e9r\u00e9es par cette m\u00e9thode sont de petite taille et ne s&#039;agglom\u00e9rent pas facilement.<\/p>","protected":false},"excerpt":{"rendered":"<p>La poudre de silicium sph\u00e9rique est un mat\u00e9riau essentiel dans diverses industries, appr\u00e9ci\u00e9 pour ses propri\u00e9t\u00e9s et ses applications uniques. Sa production implique de multiples techniques class\u00e9es en m\u00e9thodes physiques et m\u00e9thodes chimiques. Il [\u2026]<\/p>","protected":false},"author":2,"featured_media":14852,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[42],"tags":[],"class_list":["post-14849","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - 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