{"id":2085,"date":"2021-01-20T15:40:55","date_gmt":"2021-01-20T14:40:55","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=2085"},"modified":"2025-09-29T22:15:44","modified_gmt":"2025-09-29T20:15:44","slug":"billes-en-saphir","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/fr\/produits\/billes-en-saphir-et-rubis\/billes-en-saphir\/","title":{"rendered":"Billes en Saphir"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Corundum\">Billes en saphir \u2013 Composants de pr\u00e9cision haute performance<\/a><\/h2>\n<p>Les billes en saphir sont des sph\u00e8res de pr\u00e9cision fabriqu\u00e9es en saphir synth\u00e9tique (Al\u2082O\u2083), une forme cristalline du corindon. R\u00e9put\u00e9es pour leur duret\u00e9 exceptionnelle \u2014 juste apr\u00e8s le diamant \u2014 elles offrent une remarquable r\u00e9sistance \u00e0 l\u2019usure, une stabilit\u00e9 dimensionnelle et une r\u00e9silience thermique. Leurs propri\u00e9t\u00e9s uniques les rendent indispensables pour l\u2019a\u00e9ronautique, l\u2019instrumentation biom\u00e9dicale et les environnements \u00e0 vide pouss\u00e9.<\/p>\n<h3>\ud83d\udd27 Sp\u00e9cifications techniques cl\u00e9s<\/h3>\n<ul>\n<li><strong>Structure cristalline<\/strong> : Monocristal hexagonal rhombo\u00e9drique<\/li>\n<li><strong>Composition<\/strong> : Al\u2082O\u2083 (saphir synth\u00e9tique)<\/li>\n<li><strong>Puret\u00e9<\/strong> : 99,99 %<\/li>\n<li><strong>Densit\u00e9<\/strong> : ~3,99 g\/cm\u00b3<\/li>\n<li><strong>Duret\u00e9 Mohs<\/strong> : 9<\/li>\n<li><strong>Duret\u00e9 Knoop<\/strong> : ~2200 (axe C), ~1800 (perpendiculaire \u00e0 l\u2019axe C)<\/li>\n<li><strong>Module d\u2019Young<\/strong> : ~440 GPa<\/li>\n<li><strong>Point de fusion<\/strong> : ~2050 \u00b0C<\/li>\n<li><strong>Conductivit\u00e9 thermique<\/strong> : ~40 W\/m\u00b7K \u00e0 300 K<\/li>\n<li><strong>Coefficient de dilatation thermique<\/strong> : 6,2 \u00d7 10\u207b\u2076 \/\u00b0C (parall\u00e8le \u00e0 l\u2019axe C), 5,4 \u00d7 10\u207b\u2076 \/\u00b0C (perpendiculaire)<\/li>\n<li><strong>R\u00e9sistivit\u00e9 \u00e9lectrique<\/strong> : &gt;10\u00b9\u00b2 \u03a9\u00b7cm (isolant)<\/li>\n<li><strong>Constante di\u00e9lectrique<\/strong> : 10,6 (parall\u00e8le), 8,6 (perpendiculaire \u00e0 l\u2019axe C)<\/li>\n<\/ul>\n<h3>\u2705 Avantages<\/h3>\n<ul>\n<li><strong>Duret\u00e9 et r\u00e9sistance \u00e0 l\u2019usure exceptionnelles<\/strong> : Longue dur\u00e9e de vie en environnements \u00e0 fort frottement.<\/li>\n<li><strong>Haute stabilit\u00e9 thermique<\/strong> : Fonctionnement efficace jusqu\u2019\u00e0 ~2050 \u00b0C.<\/li>\n<li><strong>Inertie chimique<\/strong> : R\u00e9sistance \u00e0 la plupart des acides et des alcalins.<\/li>\n<li><strong>Stabilit\u00e9 dimensionnelle<\/strong> : Conservent leur forme sous contraintes m\u00e9caniques et thermiques.<\/li>\n<li><strong>Isolation \u00e9lectrique<\/strong> : Id\u00e9ales lorsqu\u2019un mat\u00e9riau non conducteur est requis.<\/li>\n<li><strong>Transparence optique<\/strong> : Utile lorsque la transparence est essentielle.<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Applications des billes en saphir<\/h3>\n<p>Les billes de saphir pour roulements sont utilis\u00e9es dans diverses applications de haute pr\u00e9cision, notamment :<\/p>\n<ul>\n<li><strong>Roulements de pr\u00e9cision<\/strong> : Montres m\u00e9caniques, gyroscopes et autres instruments \u00e0 faible frottement et haute durabilit\u00e9.<\/li>\n<li><strong>Syst\u00e8mes optiques<\/strong> : Connecteurs \u00e0 fibre optique, syst\u00e8mes laser et dispositifs d\u2019alignement optique.<\/li>\n<li><strong>Instruments de mesure<\/strong> : D\u00e9bitm\u00e8tres, scanners de codes-barres et autres \u00e9quipements m\u00e9trologiques.<\/li>\n<li><strong>A\u00e9rospatiale et biom\u00e9dical<\/strong> : Milieux n\u00e9cessitant une fiabilit\u00e9 et des performances \u00e9lev\u00e9es.<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Qualit\u00e9s et dimensions disponibles<\/h3>\n<p>Les billes de saphir pour roulements sont disponibles en diverses qualit\u00e9s et dimensions :<\/p>\n<ul>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/precision-grades\/\"><strong>Qualit\u00e9s<\/strong> : G1, G2, G3, G5, G10, jusqu\u2019\u00e0 G25<\/a><\/li>\n<li><strong>Tailles<\/strong> : Diam\u00e8tres de 0,16 mm \u00e0 25 mm ; dimensions sur mesure sur demande.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Billes en saphir \u2013 Composants de pr\u00e9cision haute performance Les billes en saphir sont des sph\u00e8res de pr\u00e9cision fabriqu\u00e9es en saphir synth\u00e9tique (Al\u2082O\u2083), une forme cristalline du corindon. R\u00e9put\u00e9es pour leur duret\u00e9 exceptionnelle \u2014 juste apr\u00e8s le diamant \u2014 elles offrent une remarquable r\u00e9sistance \u00e0 l\u2019usure, une stabilit\u00e9 dimensionnelle et une r\u00e9silience thermique. Leurs [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9241,"parent":2081,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2085","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Billes en Saphir \u2013 Duret\u00e9, stabilit\u00e9 et pr\u00e9cision optique<\/title>\n<meta name=\"description\" content=\"Billes en Saphir : tr\u00e8s dures, r\u00e9sistantes \u00e0 l\u2019usure et transparentes, id\u00e9ales pour instruments de pr\u00e9cision, roulements et usages techniques\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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