{"id":137,"count":0,"description":"
\r\n\r\nKeramika z oxidu hlinit\u00e9ho (Al\u2082O\u2083) <\/b><\/strong>a korund\"\"<\/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\nKl\u00ed\u010dov\u00e9 vlastnosti keramick\u00e9ho oxidu hlinit\u00e9ho <\/b><\/strong>V\u00fdhody:<\/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>Nev\u00fdhody:<\/b><\/strong>\r\n<\/strong>N\u00edzk\u00e1 hou\u017eevnatost, relativn\u011b k\u0159ehk\u00fd.\r\n<\/b><\/strong>\r\n\r\nKONTAKTUJTE N\u00c1S<\/a>\r\n\r\nObecn\u00e9\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Vlastnost<\/td>\r\nJednotka<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99.7%Al2O3<\/td>\r\n99.99%Al2O3<\/td>\r\n<\/tr>\r\n
Barva<\/td>\r\n<\/td>\r\nb\u00edl\u00e1<\/td>\r\nSlonov\u00e1 kost<\/td>\r\nSlonov\u00e1 kost<\/td>\r\nLedov\u011b b\u00edl\u00e1\/sv\u011btle b\u00edl\u00e1<\/td>\r\n<\/tr>\r\n
Hustota<\/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
Absorpce vody<\/td>\r\n%<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n0<\/td>\r\n<\/tr>\r\n
Propustnost plynu<\/td>\r\natms-cc\/sec<\/td>\r\nplynot\u011bsnost <10-\u00b9\u00ba<\/td>\r\nplynot\u011bsnost <10-\u00b9\u00ba<\/td>\r\nplynot\u011bsnost <10-\u00b9\u00ba<\/td>\r\nplynot\u011bsnost <10-\u00b9\u00ba<\/td>\r\n<\/tr>\r\n
Optick\u00fd p\u0159enos<\/td>\r\n\u03bcm<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n0.3 ~ 5<\/td>\r\n<\/tr>\r\n
Ztr\u00e1ta odrazu<\/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\nMechanick\u00e9 vlastnosti\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Vlastnosti<\/td>\r\nJednotka<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99.7%Al2O3<\/td>\r\n99.99%Al2O3<\/td>\r\n<\/tr>\r\n
Tvrdost podle Vickerse (500 gm)<\/td>\r\nGPa (kg\/mm2\u00a0)<\/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
Tvrdost podle Rockwella<\/td>\r\nR45N<\/td>\r\n79<\/td>\r\n81<\/td>\r\n86<\/td>\r\n91<\/td>\r\n<\/tr>\r\n
Pevnost v tlaku p\u0159i 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
Lomov\u00e1 hou\u017eevnatost (vroubkovan\u00fd nosn\u00edk)<\/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
Modul pru\u017enosti<\/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
Poisson\u016fv pom\u011br<\/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
Modul v tahu p\u0159i 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\nTepeln\u00e9 vlastnosti\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Vlastnost<\/td>\r\nJednotka<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99.7%Al2O3<\/td>\r\n99.99%Al2O3<\/td>\r\n<\/tr>\r\n
Tepeln\u00e1 vodivost p\u0159i 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
M\u011brn\u00e1 tepeln\u00e1 kapacita<\/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
Maxim\u00e1ln\u00ed provozn\u00ed teplota vzduchu\/nertu<\/td>\r\n\u00b0F<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n3000<\/td>\r\n<\/tr>\r\n
\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\nElektrick\u00e9 vlastnosti\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
Vlastnost<\/td>\r\nJednotka<\/td>\r\n95%Al2O3<\/td>\r\n99%Al2O3<\/td>\r\n99.7%Al2O3<\/td>\r\n99.99%Al2O3<\/td>\r\n<\/tr>\r\n
Dielektrick\u00e1 konstanta p\u0159i 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
Dielektrick\u00e1 konstanta @ Gigahertz<\/td>\r\n<\/td>\r\n11<\/td>\r\n9.8<\/td>\r\n9.6<\/td>\r\n<\/td>\r\n<\/tr>\r\n
Dielektrick\u00e9 ztr\u00e1ty p\u0159i 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
Dielektrick\u00e9 ztr\u00e1ty @ 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
Dielektrick\u00e1 pevnost (tlou\u0161\u0165ka 0,125\")<\/td>\r\nV\/mil<\/td>\r\n250<\/td>\r\n260<\/td>\r\n290<\/td>\r\n430<\/td>\r\n<\/tr>\r\n
Objemov\u00fd odpor p\u0159i 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
Objemov\u00fd odpor p\u0159i 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
Objemov\u00fd odpor p\u0159i 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
Objemov\u00fd odpor p\u0159i 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\nKONTAKTUJTE N\u00c1S<\/a>\r\n

Pou\u017eit\u00ed keramiky z oxidu hlinit\u00e9ho<\/b><\/strong><\/h3>\r\nHlin\u00edkov\u00e1 keramika se \u0161iroce pou\u017e\u00edv\u00e1 v \u0159ad\u011b pr\u016fmyslov\u00fdch a biomedic\u00ednsk\u00fdch obor\u016f, mimo jin\u00e9:\r\n
    \r\n \t
  • Vakuov\u00e1 elektronick\u00e1 za\u0159\u00edzen\u00ed<\/strong><\/li>\r\n \t
  • Substr\u00e1ty pro tlust\u00e9 a tenk\u00e9 vrstvy obvod\u016f<\/strong><\/li>\r\n \t
  • Izol\u00e1tory zapalovac\u00edch sv\u00ed\u010dek<\/strong><\/li>\r\n \t
  • Textiln\u00ed keramick\u00e9 komponenty<\/strong><\/li>\r\n \t
  • Brusiva, brusn\u00e9 n\u00e1stroje a keramick\u00e9 \u0159ezn\u00e9 n\u00e1stroje<\/strong><\/li>\r\n \t
  • Vysokoteplotn\u00ed konstruk\u010dn\u00ed d\u00edly<\/strong><\/li>\r\n \t
  • Saf\u00edr (99,99 % Al\u2082O\u2083) lze pou\u017e\u00edt pro periskopy, dalekohledy a \u010do\u010dky m\u011b\u0159ic\u00edch p\u0159\u00edstroj\u016f.<\/b><\/strong><\/li>\r\n<\/ul>\r\n \r\n\r\nStupn\u011b \u010distoty 4 keramick\u00fdch materi\u00e1l\u016f z oxidu hlinit\u00e9ho<\/strong>\r\n
    \r\n
    \"\"\r\n95% oxid hlinit\u00fd \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99% oxid hlinit\u00fd \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99,7 % oxid hlinit\u00fd \uff08A12O3\uff09<\/strong><\/div>\r\n
    \"\"\r\n99,99 % oxid hlinit\u00fd ( A12O3)<\/strong><\/div>\r\n<\/div>\r\n \r\n\r\nCNC obr\u00e1b\u011bn\u00ed keramiky z oxidu hlinit\u00e9ho<\/strong>\r\nSpole\u010dnost Yixing WEIERT Ceramics Technology Co., Ltd. je p\u0159edn\u00edm v\u00fdrobcem a v\u00fdvozcem keramiky z oxidu hlinit\u00e9ho. D\u00edky specializovan\u00e9mu odd\u011blen\u00ed v\u00fdzkumu a v\u00fdvoje (R&D) keramick\u00fdch materi\u00e1l\u016f neust\u00e1le inovujeme a zlep\u0161ujeme vlastnosti materi\u00e1l\u016f, abychom vyhov\u011bli r\u016fznorod\u00fdm pot\u0159eb\u00e1m na\u0161ich z\u00e1kazn\u00edk\u016f. Na rozd\u00edl od obchodn\u00edch zprost\u0159edkovatel\u016f jsme p\u0159\u00edm\u00fdm v\u00fdrobcem s pln\u00fdmi vlastn\u00edmi kapacitami, co\u017e n\u00e1m umo\u017e\u0148uje kontrolovat cel\u00fd proces v\u00fdroby technick\u00e9 keramiky - od v\u00fdroby surovin a sp\u00e9k\u00e1n\u00ed a\u017e po CNC obr\u00e1b\u011bn\u00ed. Od roku 2016 jsme vyrobili v\u00edce ne\u017e 5 000 typ\u016f p\u0159esn\u00fdch keramick\u00fdch v\u00fdrobk\u016f pro stovky spole\u010dnost\u00ed.","link":"https:\/\/weiert-ceramics.com\/cs\/materials\/alumina-ceramic-al2o3\/","name":"Aluminov\u00e1 keramika (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. Learn about its production and properties here.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/weiert-ceramics.com\/cs\/category\/faq\/ceramic-materials-knowledge-base\/ceramic-materials\/alumina-ceramic-al2o3\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Alumina Ceramic, Al2O3 Features Explained\" \/>\n<meta property=\"og:description\" content=\"Discover Alumina Ceramic, Al2O3, a key member of advanced ceramics. 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