{"id":137,"count":0,"description":"
\r\n\r\nCer\u00e2mica de Alumina (Al\u2082O\u2083) e <\/b><\/strong>corundum.\"\"<\/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\nPrincipais propriedades da cer\u00e2mica de alumina <\/b><\/strong>Vantagens:<\/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>Desvantagens:<\/b><\/strong>\r\n<\/strong>Baixa tenacidade, relativamente quebradi\u00e7o.\r\n<\/b><\/strong>\r\n\r\nCONTATE-NOS<\/a>\r\n\r\nEm geral\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
propriedade<\/td>\r\nUnidade<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99.7%Al2O3<\/td>\r\n99.99%Al2O3<\/td>\r\n<\/tr>\r\n
Cor<\/td>\r\n<\/td>\r\nbranco<\/td>\r\nMarfim<\/td>\r\nMarfim<\/td>\r\nGelado\/Branco-sujo<\/td>\r\n<\/tr>\r\n
Densidade<\/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
Absor\u00e7\u00e3o de \u00e1gua<\/td>\r\n%<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n<\/tr>\r\n
Permeabilidade a gases<\/td>\r\natms-cc\/sec<\/td>\r\nestanque ao g\u00e1s <10\u207b\u00b9\u00ba<\/td>\r\nestanque ao g\u00e1s <10\u207b\u00b9\u00ba<\/td>\r\nestanque ao g\u00e1s <10\u207b\u00b9\u00ba<\/td>\r\nestanque ao g\u00e1s <10\u207b\u00b9\u00ba<\/td>\r\n<\/tr>\r\n
Transmiss\u00e3o \u00d3ptica<\/td>\r\n\u03bcm<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n0.3 ~ 5<\/td>\r\n<\/tr>\r\n
Perda de reflex\u00e3o<\/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\nPropriedades mec\u00e2nicas\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Propriedade<\/td>\r\nUnidade<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99.7%Al2O3<\/td>\r\n99.99%Al2O3<\/td>\r\n<\/tr>\r\n
Dureza 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
Rockwell Hardness<\/td>\r\nR45N<\/td>\r\n79<\/td>\r\n81<\/td>\r\n86<\/td>\r\n91<\/td>\r\n<\/tr>\r\n
Resist\u00eancia \u00e0 compress\u00e3o 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
Tenacidade \u00e0 Fratura (Viga Entalhada)<\/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
Modulus of Elasticity<\/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
Raz\u00e3o de Poisson<\/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
M\u00f3dulo de Tra\u00e7\u00e3o 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\nPropriedades t\u00e9rmicas\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Propriedade<\/td>\r\nUnidade<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99.7%Al2O3<\/td>\r\n99.99%Al2O3<\/td>\r\n<\/tr>\r\n
Condutividade t\u00e9rmica 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
Capacidade t\u00e9rmica espec\u00edfica<\/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 \u2013 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
Temperatura M\u00e1x. de Servi\u00e7o Ar\/Inerte<\/td>\r\nFahrenheit (\u00b0F)<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n<\/tr>\r\n
Fahrenheit (\u00b0F)<\/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\nPropriedades el\u00e9tricas\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
Propriedade<\/td>\r\nUnidade<\/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 Diel\u00e9trica @ 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 Diel\u00e9trica @ Gigahertz<\/td>\r\n<\/td>\r\n11<\/td>\r\n9.8<\/td>\r\n9.6<\/td>\r\n<\/td>\r\n<\/tr>\r\n
Perda Diel\u00e9trica 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
Perda Diel\u00e9trica em 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
Rigidez diel\u00e9trica (0,125\u201d de espessura)<\/td>\r\nV\/mil<\/td>\r\n250<\/td>\r\n260<\/td>\r\n290<\/td>\r\n430<\/td>\r\n<\/tr>\r\n
Resistividade volum\u00e9trica a 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
Resistividade volum\u00e9trica a 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
Resistividade volum\u00e9trica a 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
Resistividade volum\u00e9trica a 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\nCONTATE-NOS<\/a>\r\n

Aplica\u00e7\u00f5es da Cer\u00e2mica de Alumina<\/b><\/strong><\/h3>\r\nAs cer\u00e2micas de alumina s\u00e3o amplamente utilizadas em uma variedade de campos industriais e biom\u00e9dicos, incluindo, mas n\u00e3o se limitando a:\r\n
    \r\n \t
  • Dispositivos eletr\u00f4nicos a v\u00e1cuo<\/strong><\/li>\r\n \t
  • Substratos de circuito de filme espesso e fino<\/strong><\/li>\r\n \t
  • Isoladores de velas de igni\u00e7\u00e3o<\/strong><\/li>\r\n \t
  • Componentes Cer\u00e2micos T\u00eaxteis<\/strong><\/li>\r\n \t
  • Abrasivos, ferramentas de retifica\u00e7\u00e3o e ferramentas de corte de cer\u00e2mica<\/strong><\/li>\r\n \t
  • Pe\u00e7as estruturais de alta temperatura<\/strong><\/li>\r\n \t
  • Safira (99,99% Al\u2082O\u2083) pode ser usada em perisc\u00f3pios, lunetas e lentes de instrumentos de medi\u00e7\u00e3o.<\/b><\/strong><\/li>\r\n<\/ul>\r\n \r\n\r\nGraus de material cer\u00e2mico de alumina - 4 n\u00edveis de pureza<\/strong>\r\n
    \r\n
    \"\"\r\n95% Alumina \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99% Alumina \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99,7% de alumina (A12O3)<\/strong><\/div>\r\n
    \"\"\r\n99,99% Alumina ( A12O3)<\/strong><\/div>\r\n<\/div>\r\n \r\n\r\nUsinagem CNC de cer\u00e2mica de alumina<\/strong>\r\nA Yixing WEIERT Ceramics Technology Co., Ltd. \u00e9 l\u00edder na fabrica\u00e7\u00e3o e exporta\u00e7\u00e3o de cer\u00e2micas de alumina. Com um departamento dedicado \u00e0 pesquisa e desenvolvimento (P&D) de materiais cer\u00e2micos, inovamos e aprimoramos continuamente o desempenho dos materiais para atender \u00e0s diversas necessidades de nossos clientes. Diferentemente de intermedi\u00e1rios comerciais, somos um fabricante direto com capacidade interna completa, o que nos permite controlar todo o processo de produ\u00e7\u00e3o de cer\u00e2mica t\u00e9cnica \u2014 desde a produ\u00e7\u00e3o da mat\u00e9ria-prima e sinteriza\u00e7\u00e3o at\u00e9 a usinagem CNC. Desde 2016, produzimos mais de 5.000 tipos de produtos cer\u00e2micos de precis\u00e3o para centenas de empresas.","link":"https:\/\/weiert-ceramics.com\/pt\/materials\/alumina-ceramic-al2o3\/","name":"Cer\u00e2mica de alumina (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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