{"id":137,"count":0,"description":"
\r\n\r\nCeramica di allumina (Al\u2082O\u2083) e <\/b><\/strong>corindone.\"\"<\/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\nPropriet\u00e0 chiave della ceramica di allumina <\/b><\/strong>Vantaggi:<\/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>Svantaggi:<\/b><\/strong>\r\n<\/strong>Bassa tenacit\u00e0, relativamente fragile.\r\n<\/b><\/strong>\r\n\r\nCONTATTACI<\/a>\r\n\r\nGenerale\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
propriet\u00e0<\/td>\r\nUnit\u00e0<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Colore<\/td>\r\n<\/td>\r\nbianco<\/td>\r\nAvorio<\/td>\r\nAvorio<\/td>\r\nBianco ghiaccio\/spento<\/td>\r\n<\/tr>\r\n
Densit\u00e0<\/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
Assorbimento dell'acqua<\/td>\r\n%<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n<\/tr>\r\n
Permeabilit\u00e0 al gas<\/td>\r\natms-cc\/sec<\/td>\r\ntenuta al gas <10-\u00b9\u00ba<\/td>\r\ntenuta al gas <10-\u00b9\u00ba<\/td>\r\ntenuta al gas <10-\u00b9\u00ba<\/td>\r\ntenuta al gas <10-\u00b9\u00ba<\/td>\r\n<\/tr>\r\n
Trasmissione ottica<\/td>\r\n\u03bcm<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n0.3 ~ 5<\/td>\r\n<\/tr>\r\n
Perdita di riflessione<\/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\nPropriet\u00e0 meccaniche\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Propriet\u00e0<\/td>\r\nUnit\u00e0<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Durezza 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
Durezza Rockwell<\/td>\r\nR45N<\/td>\r\n79<\/td>\r\n81<\/td>\r\n86<\/td>\r\n91<\/td>\r\n<\/tr>\r\n
Resistenza alla compressione a 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
Durezza alla frattura (trave con intaglio)<\/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
Modulo di elasticit\u00e0<\/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
Rapporto 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
Modulo di trazione a 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\nPropriet\u00e0 termiche\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Propriet\u00e0<\/td>\r\nUnit\u00e0<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Conduttivit\u00e0 termica a 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\u00e0 termica specifica<\/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-\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-\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-\u2076\/C<\/td>\r\n7.7<\/td>\r\n7.6<\/td>\r\n8.0<\/td>\r\n8.1<\/td>\r\n<\/tr>\r\n
Temperatura massima di servizio aria\/inerte<\/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\nPropriet\u00e0 elettriche\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
Propriet\u00e0<\/td>\r\nUnit\u00e0<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99,7%Al2O3<\/td>\r\n99,99%Al2O3<\/td>\r\n<\/tr>\r\n
Costante dielettrica a 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
Costante dielettrica @ Gigahertz<\/td>\r\n<\/td>\r\n11<\/td>\r\n9.8<\/td>\r\n9.6<\/td>\r\n<\/td>\r\n<\/tr>\r\n
Perdita dielettrica a 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
Perdita dielettrica @ 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\u00e0 dielettrica (.125\" di spessore)<\/td>\r\nV\/mil<\/td>\r\n250<\/td>\r\n260<\/td>\r\n290<\/td>\r\n430<\/td>\r\n<\/tr>\r\n
Resistivit\u00e0 di volume a 25\u00b0C<\/td>\r\nohm-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
Resistivit\u00e0 di volume a 300\u00b0C<\/td>\r\nohm-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
Resistivit\u00e0 di volume a 500\u00b0C<\/td>\r\nohm-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
Resistivit\u00e0 di volume a 700\u00b0C<\/td>\r\nohm-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\nCONTATTACI<\/a>\r\n

Applicazioni della ceramica di allumina<\/b><\/strong><\/h3>\r\nLe ceramiche di allumina sono ampiamente utilizzate in una serie di settori industriali e biomedici, tra cui, ma non solo:\r\n
    \r\n \t
  • Dispositivi elettronici sotto vuoto<\/strong><\/li>\r\n \t
  • Substrati per circuiti a film spesso e sottile<\/strong><\/li>\r\n \t
  • Isolatori per candele di accensione<\/strong><\/li>\r\n \t
  • Componenti tessili ceramici<\/strong><\/li>\r\n \t
  • Abrasivi, utensili per la rettifica e utensili da taglio in ceramica<\/strong><\/li>\r\n \t
  • Parti strutturali ad alta temperatura<\/strong><\/li>\r\n \t
  • Lo zaffiro (99,99% Al\u2082O\u2083) pu\u00f2 essere utilizzato per periscopi, cannocchiali e lenti di strumenti di misura.<\/b><\/strong><\/li>\r\n<\/ul>\r\n \r\n\r\nMateriali ceramici in allumina Gradi-4 Livelli di purezza<\/strong>\r\n
    \r\n
    \"\"\r\n95% Allumina (A12O3\uff09)<\/strong><\/div>\r\n
    \"\"\r\n99% Allumina (A12O3\uff09)<\/strong><\/div>\r\n
    \"\"\r\n99,7% Allumina (A12O3\uff09)<\/strong><\/div>\r\n
    \"\"\r\n99,99% Allumina ( A12O3)<\/strong><\/div>\r\n<\/div>\r\n \r\n\r\nLavorazione CNC della ceramica di allumina<\/strong>\r\nYixing WEIERT Ceramics Technology Co., Ltd. \u00e8 un produttore ed esportatore leader di ceramiche di allumina. Con un reparto di ricerca e sviluppo (R&S) dedicato ai materiali ceramici, innoviamo e miglioriamo continuamente le prestazioni dei materiali per soddisfare le diverse esigenze dei nostri clienti. A differenza degli intermediari commerciali, siamo un produttore diretto con capacit\u00e0 interne complete, che ci consentono di controllare l'intero processo tecnico di produzione della ceramica, dalla produzione di materie prime e sinterizzazione alla lavorazione CNC. Dal 2016 abbiamo prodotto oltre 5.000 tipi di prodotti ceramici di precisione per centinaia di aziende.","link":"https:\/\/weiert-ceramics.com\/it\/materials\/alumina-ceramic-al2o3\/","name":"Ceramica di allumina (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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