{"id":137,"count":0,"description":"
\r\n\r\nC\u00e9ramiques d'alumine (Al\u2082O\u2083) et <\/b><\/strong>corindon.\"\"<\/b><\/strong>\r\nAlumina ceramics (Al\u2082O\u2083),\u00a0 are a key member of advanced ceramics family, made from high-purity synthetic alumina powder. The process involves molding the powder into green bodies with pressure-forming equipment, followed by high-temperature sintering. For high-precision components, CNC machining is often used before or after sintering.\r\n\r\nWith the rise of 3D printing, alumina photopolymerization has become an important shaping method\u00a0as well.\r\nAlumina ceramics come in various forms based on crystal structure, mainly including \u03b1-Al\u2082O\u2083, \u03b2-Al\u2082O\u2083, and \u03b3-Al\u2082O\u2083. After high-temperature sintering (typically over 1200\u00b0C), all structures transform into \u03b1-Al\u2082O\u2083, also called corundum.\r\n\r\nThe most commonly used alumina ceramics contain 90% or more Al\u2082O\u2083, with varieties such as 95%, 99%, 99.7%, and 99.99% purity. Alumina with 99.99% purity is often semi-transparent or transparent, known as sapphire.\r\n\r\n<\/div>\r\nPrincipales propri\u00e9t\u00e9s des c\u00e9ramiques d'alumine <\/b><\/strong>Avantages :<\/b><\/strong>\r\n<\/strong>High Melting Point\r\nHigh Hardness\r\nChemical Corrosion Resistance\r\nOutstanding Dielectric Properties\r\nSuperior Optical Properties (for 99.99% Transparent Alumina)\r\n\r\n<\/strong>Inconv\u00e9nients :<\/b><\/strong>\r\n<\/strong>Faible t\u00e9nacit\u00e9, relativement fragile.\r\n<\/b><\/strong>\r\n\r\nCONTACTEZ-NOUS<\/a>\r\n\r\nG\u00e9n\u00e9ral\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
propri\u00e9t\u00e9<\/td>\r\nUnit\u00e9<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Couleur<\/td>\r\n<\/td>\r\nblanc<\/td>\r\nIvoire<\/td>\r\nIvoire<\/td>\r\nIcy\/Off White<\/td>\r\n<\/tr>\r\n
Densit\u00e9<\/td>\r\ng\/cm\u00b3<\/td>\r\n3.72<\/td>\r\n3.9<\/td>\r\n3.92<\/td>\r\n3.98<\/td>\r\n<\/tr>\r\n
Absorption de l'eau<\/td>\r\n%<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n<\/tr>\r\n
Perm\u00e9abilit\u00e9 au gaz<\/td>\r\natms-cc\/sec<\/td>\r\n\u00e9tanche au gaz <10-\u00b9\u00ba<\/td>\r\n\u00e9tanche au gaz <10-\u00b9\u00ba<\/td>\r\n\u00e9tanche au gaz <10-\u00b9\u00ba<\/td>\r\n\u00e9tanche au gaz <10-\u00b9\u00ba<\/td>\r\n<\/tr>\r\n
Transmission optique<\/td>\r\n\u03bcm<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n0.3 ~ 5<\/td>\r\n<\/tr>\r\n
Perte par r\u00e9flexion<\/td>\r\ndB<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n0.2<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nPropri\u00e9t\u00e9s m\u00e9caniques\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Propri\u00e9t\u00e9<\/td>\r\nUnit\u00e9<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Duret\u00e9 Vickers (500 g)<\/td>\r\nGPa (kg\/mm2 )<\/td>\r\n11.5 (1175)<\/td>\r\n12.7 (1300)<\/td>\r\n15\uff081530\uff09<\/td>\r\n19.6\uff082000\uff09<\/td>\r\n<\/tr>\r\n
Duret\u00e9 Rockwell<\/td>\r\nR45N<\/td>\r\n79<\/td>\r\n81<\/td>\r\n86<\/td>\r\n91<\/td>\r\n<\/tr>\r\n
R\u00e9sistance \u00e0 la compression \u00e0 25\u00b0C<\/td>\r\nMPa (psi x 10\u00b3)<\/td>\r\n1827 (265)<\/td>\r\n2241 (325)<\/td>\r\n2240 (325)<\/td>\r\n2413 (350)<\/td>\r\n<\/tr>\r\n
Flexural Strength (MOR)\r\n(3 point)\u00a0 @ 25\u00b0C<\/td>\r\nMPa (psi x 10\u00b3)<\/td>\r\n310 (45)<\/td>\r\n393 (57)<\/td>\r\n379 (55)<\/td>\r\n455 (66)<\/td>\r\n<\/tr>\r\n
R\u00e9sistance \u00e0 la rupture (poutre entaill\u00e9e)<\/td>\r\nMPam1\/2<\/td>\r\n3-4<\/td>\r\n4-5<\/td>\r\n3-4<\/td>\r\n5-6<\/td>\r\n<\/tr>\r\n
Module d'\u00e9lasticit\u00e9<\/td>\r\nGPa (psi x 10\u2076)<\/td>\r\n303 (44)<\/td>\r\n345 (50)<\/td>\r\n379 (55)<\/td>\r\n393 (57)<\/td>\r\n<\/tr>\r\n
Rapport Poissons<\/td>\r\n<\/td>\r\n0.22<\/td>\r\n0.23<\/td>\r\n0.23<\/td>\r\n0.23<\/td>\r\n<\/tr>\r\n
Module de traction \u00e0 25\u00b0C<\/td>\r\nMPa (psi x 10\u00b3)<\/td>\r\n151 (22)<\/td>\r\n221 (32)<\/td>\r\n200 (29)<\/td>\r\n275 (40)<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nPropri\u00e9t\u00e9s thermiques\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Propri\u00e9t\u00e9<\/td>\r\nUnit\u00e9<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Conductivit\u00e9 thermique \u00e0 25\u00b0C<\/td>\r\nW\/m-K<\/td>\r\n20<\/td>\r\n30<\/td>\r\n30<\/td>\r\n35<\/td>\r\n<\/tr>\r\n
Capacit\u00e9 thermique sp\u00e9cifique<\/td>\r\nJ\/g-\u00b0C<\/td>\r\n0.88<\/td>\r\n0.88<\/td>\r\n0.90<\/td>\r\n<\/td>\r\n<\/tr>\r\n
C.T.E. 25 - 100\u00b0C<\/td>\r\nx 10\u207b\u2076\/C<\/td>\r\n6.1<\/td>\r\n6.2<\/td>\r\n6.5<\/td>\r\n6.5<\/td>\r\n<\/tr>\r\n
C.T.E. 25\u00b0-300\u00b0C<\/td>\r\nx 10\u207b\u2076\/C<\/td>\r\n7.0<\/td>\r\n6.8<\/td>\r\n7.8<\/td>\r\n7.8<\/td>\r\n<\/tr>\r\n
C.T.E. 25\u00b0-600\u00b0C<\/td>\r\nx 10\u207b\u2076\/C<\/td>\r\n7.7<\/td>\r\n7.6<\/td>\r\n8.0<\/td>\r\n8.1<\/td>\r\n<\/tr>\r\n
Temp\u00e9rature de service maximale Air\/Inert<\/td>\r\nFahrenheit (\u00b0F)<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n<\/tr>\r\n
Celsius (\u00b0C)<\/td>\r\n1650<\/td>\r\n1650<\/td>\r\n1650<\/td>\r\n1650<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nPropri\u00e9t\u00e9s \u00e9lectriques\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Propri\u00e9t\u00e9<\/td>\r\nUnit\u00e9<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Constante di\u00e9lectrique \u00e0 1 MHz<\/td>\r\n<\/td>\r\n9.2<\/td>\r\n9.5<\/td>\r\n10<\/td>\r\n<\/td>\r\n<\/tr>\r\n
Constante di\u00e9lectrique @ Gigahertz<\/td>\r\n<\/td>\r\n11<\/td>\r\n9.8<\/td>\r\n9.6<\/td>\r\n<\/td>\r\n<\/tr>\r\n
Perte di\u00e9lectrique \u00e0 1 MHz<\/td>\r\n<\/td>\r\n0.0009<\/td>\r\n0.0005<\/td>\r\n\u00a0< .0001<\/td>\r\n<\/td>\r\n<\/tr>\r\n
Perte di\u00e9lectrique @ Gigahertz<\/td>\r\n<\/td>\r\n12.5<\/td>\r\n9.8<\/td>\r\n9.6<\/td>\r\n<\/td>\r\n<\/tr>\r\n
Rigidit\u00e9 di\u00e9lectrique (.125\" d'\u00e9paisseur)<\/td>\r\nV\/mil<\/td>\r\n250<\/td>\r\n260<\/td>\r\n290<\/td>\r\n430<\/td>\r\n<\/tr>\r\n
R\u00e9sistivit\u00e9 volumique \u00e0 25\u00b0C<\/td>\r\nohms-cm<\/td>\r\n> 1 x 10\u00b9\u2074<\/td>\r\n> 1 x 10\u00b9\u2074<\/td>\r\n> 1 x 10\u00b9\u2074<\/td>\r\n> 1 x 10\u00b9\u2074<\/td>\r\n<\/tr>\r\n
R\u00e9sistivit\u00e9 volumique \u00e0 300\u00b0C<\/td>\r\nohms-cm<\/td>\r\n5 x 10\u00b9\u00b2<\/td>\r\n8 x 10\u00b9\u00b9<\/td>\r\n3 x 10\u00b9\u00b2<\/td>\r\n1 x 10\u00b9\u00b3<\/td>\r\n<\/tr>\r\n
R\u00e9sistivit\u00e9 volumique \u00e0 500\u00b0C<\/td>\r\nohms-cm<\/td>\r\n3 x 10\u2079<\/td>\r\n2 x 10\u2079<\/td>\r\n6 x 10\u00b9\u00ba<\/td>\r\n5 x 10\u00b9\u00b2<\/td>\r\n<\/tr>\r\n
R\u00e9sistivit\u00e9 volumique \u00e0 700\u00b0C<\/td>\r\nohms-cm<\/td>\r\n3 x 10\u2078<\/td>\r\n2 x 10\u2078<\/td>\r\n6 x 10\u2079<\/td>\r\n1 x 10\u00b9\u00b2<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

*The values represent typical material properties and may vary depending on product configuration and the manufacturing process. For further information, do not hesitate to contact us.<\/p>\r\nCONTACTEZ-NOUS<\/a>\r\n

Applications des c\u00e9ramiques d'alumine<\/b><\/strong><\/h3>\r\nLes c\u00e9ramiques d'alumine sont largement utilis\u00e9es dans toute une s\u00e9rie de domaines industriels et biom\u00e9dicaux, y compris, mais sans s'y limiter :\r\n
    \r\n \t
  • Dispositifs \u00e9lectroniques \u00e0 vide<\/strong><\/li>\r\n \t
  • Substrats pour circuits \u00e0 couches \u00e9paisses et minces<\/strong><\/li>\r\n \t
  • Isolateurs de bougies d'allumage<\/strong><\/li>\r\n \t
  • Composants c\u00e9ramiques textiles<\/strong><\/li>\r\n \t
  • Abrasifs, outils de meulage et outils de coupe en c\u00e9ramique<\/strong><\/li>\r\n \t
  • Pi\u00e8ces structurelles \u00e0 haute temp\u00e9rature<\/strong><\/li>\r\n \t
  • Le saphir (99,99% Al\u2082O\u2083) peut \u00eatre utilis\u00e9 pour les p\u00e9riscopes, les lunettes et les lentilles d'instruments de mesure.<\/b><\/strong><\/li>\r\n<\/ul>\r\n \r\n\r\nMat\u00e9riaux c\u00e9ramiques d'alumine - 4 niveaux de puret\u00e9<\/strong>\r\n
    \r\n
    \"\"\r\n95% Alumine \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99% Alumine \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99.7% Alumine \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99.99% Alumine ( A12O3)<\/strong><\/div>\r\n<\/div>\r\n \r\n\r\nUsinage CNC C\u00e9ramiques d'alumine<\/strong>\r\nYixing WEIERT Ceramics Technology Co. est un fabricant et un exportateur de premier plan de c\u00e9ramiques d'alumine. Avec un d\u00e9partement de recherche et d\u00e9veloppement (R&D) d\u00e9di\u00e9 aux mat\u00e9riaux c\u00e9ramiques, nous innovons en permanence et am\u00e9liorons les performances des mat\u00e9riaux pour r\u00e9pondre aux divers besoins de nos clients. Contrairement aux interm\u00e9diaires commerciaux, nous sommes un fabricant direct avec des capacit\u00e9s internes compl\u00e8tes, ce qui nous permet de contr\u00f4ler l'ensemble du processus de production de c\u00e9ramique technique - de la production de mati\u00e8res premi\u00e8res et du frittage \u00e0 l'usinage CNC. Depuis 2016, nous avons produit plus de 5 000 types de produits c\u00e9ramiques de pr\u00e9cision pour des centaines d'entreprises.","link":"https:\/\/weiert-ceramics.com\/fr\/materials\/alumina-ceramic-al2o3\/","name":"C\u00e9ramique d\u2019alumine (Al\u2082O\u2083)","slug":"alumina-ceramic-al2o3","taxonomy":"category","parent":111,"meta":[],"acf":[],"z_taxonomy_image_url":"https:\/\/weiert-ceramics.com\/wp-content\/uploads\/2025\/03\/b9b27a9325267ed3ba80.jpg","yoast_head":"\nAlumina Ceramic, Al2O3 Properties Explained - Weiert Ceramics Technology Co., Ltd.<\/title>\n<meta name=\"description\" content=\"Discover alumina ceramic, also known as Al2O3, a vital material in advanced ceramics. 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