Phapang ke efe lipakeng tsa alumina ceramics le corundum?

Molamu oa ceramic oa alumina

1. Alumina ceramics;

Alumina ceramics ke thepa ea ceramic e nang le alumina (Al2O3) e le ‘mele o ka sehloohong, o sebelisetsoang lipotoloho tse teteaneng tsa filimi. Li-ceramics tsa aluminium li na le conductivity e ntle, matla a mochine le ho hanyetsa mocheso o phahameng. Hoa lokela ho hlokomeloa hore ho hloekisa ka ultrasonic hoa hlokahala. Alumina ceramics ke mofuta oa lirafshoa tse nang le mefuta e mengata ea tšebeliso. Ka lebaka la ts’ebetso ea eona e phahameng, e se e sebelisoa haholo sechabeng sa kajeno ho finyella litlhoko tsa tšebeliso ea letsatsi le letsatsi le ts’ebetso e khethehileng.

Alumina ceramic tube

Li-alumina ceramics tse hloekileng haholo ke lisebelisoa tsa ceramic tse nang le litaba tsa Al2O3 tse fetang 99.9%. Hobane mocheso oa bona oa sintering o ka holimo ho 1650-1990 ℃, ‘me bolelele ba phetisetso ke 1 ho 6 μm, hangata li entsoe ka khalase e qhibilihisitsoeng ho nka sebaka sa crucibles ea platinum; sebelisa phetisetso ea eona ea leseli E ka sebelisoa e le lebone la lebone la sodium, ‘me e ka sebelisoa e le setsi se kopantsoeng sa potoloho le lisebelisoa tse sireletsang maqhubu a phahameng indastering ea elektronike.

Li-ceramics tse tloaelehileng tsa alumina li arotsoe ka porcelain ea 99, porcelain e 95, porcelain e 90, porcelain e 85 le mefuta e meng ho latela litaba tse fapaneng tsa Al2O3. Ka linako tse ling ba nang le litaba tsa 80% kapa 75% Al2O3 ba boetse ba khetholloa e le letoto le tloaelehileng la alumina ceramic. Har’a tsona, 99 alumina porcelain e sebelisetsoa ho etsa li-crucibles tsa mocheso o phahameng, li-tubes tsa sebōpi sa refractory le lisebelisoa tse khethehileng tse sa sebetseng, tse kang li-ceramic bearings, litiiso tsa ceramic le li-discs tsa valve ea metsi; 95 alumina porcelain e sebelisoa haholo-holo e le likarolo tse sa jeng le tse sa senyeheng; 85 porcelain Kaha hangata e tsoakoa le talc, ts’ebetso ea motlakase le matla a mochini lia ntlafala, ‘me e ka koaloa ka litšepe tse kang molybdenum, niobium le tantalum, ‘me tse ling li sebelisoa e le lisebelisoa tsa vacuum ea motlakase.

2. Corundum;

Corundum, eo lebitso la hae le tsoang India, ke lebitso la mineralogical. Ho na le mefuta e meraro e ka sehloohong ea homogeneity ea corundum Al2O3, e leng α-Al2O3, β-Al2O3, le γ-Al2O3. Ho thatafala ha corundum ke ea bobeli feela ho daemane. Corundum e sebelisoa haholo bakeng sa lisebelisoa tsa boleng bo holimo, lisebelisoa tse nang le ceramic bakeng sa lioache le mechini e nepahetseng ea ceramic. kristale ea maiketsetso e thehiloeng ho ruby ​​​​e le lisebelisoa tse ntšang laser. Lirubi le safire ka bobeli ke liminerale tsa corundum. Ntle le phello ea khanya ea linaleli, ke feela corundum e khanyang-translucent-le mebala e khanyang e ka sebelisoang e le majoe a majoe. ‘Mala o mofubelu o bitsoa ruby, ha mebala e meng ea corundum e kopane e bitsoa safire khoebong.

Lebitso Corundum le tsoa India mme ke lebitso la mineralogical. Ba nang le tsebo ea gemologically ba bitsoa Ruby le Sapphire. Myanmar, Sri Lanka, Thailand, Vietnam le Cambodia ke barekisi ba bohlokoa ka ho fetisisa ba lirubi le safire tsa boleng bo holimo lefatšeng. Linaha tse ling tse hlahisang lihlahisoa li kenyelletsa Chaena, Australia, United States le Tanzania.

Corundum ke lejoe la majoe le entsoeng ka likristale tsa alumina (Al2O3). Corundum e tsoakiloeng le metallic chromium e bofubelu bo khanyang ‘me ka kakaretso e bitsoa ruby; athe corundum e putsoa kapa e se nang ‘mala hangata e hlalosoa e le safire.

Corundum e boemong ba bo-9 tafoleng ea boima ba Mohs. Matla a khoheli a itseng ke 4.00, ‘me e na le sebopeho sa letiti sa kholumo ea hexagonal. Ka boima ba corundum le theko ea eona e batlang e le tlase ho feta daemane, e fetohile thepa e ntle ea sandpaper le lisebelisoa tsa ho sila.

Corundum e na le khanya ea khalase le boima ba 9. Karolo ke 3.95-4.10. E thehiloe tlas’a maemo a mocheso o phahameng, aluminium e ruileng le silicon e futsanehileng ea C, ‘me e amana haholo le magmatism, metamorphism ea ho kopana le metamorphism ea libaka.

Corundum ke thepa e entsoeng ke motho e entsoeng ka bauxite e le thepa e ka sehloohong e tala ka sebōping sa merafo. E ka sebelisoa e le thepa ea abrasive le refractory. Corundum e tšoeu e nang le bohloeki bo phahameng e bitsoa white corundum, ‘me corundum e sootho e nang le litšila tse nyenyane e bitsoa brown corundum.