1. Ụkpụrụ ngwaahịa na njirimara Microstructural
1.1 Ọdịdị na njirimara crystallographic nke Al ₂ O ise
(Alumina Ceramic bọọlụ， Alumina Ceramic bọọlụ)
Bọọlụ seramiiki alumina bụ ihe okirikiri emere site na aluminom oxide dị arọ (Al ₂ O isii), a kpamkpam oxidized, seramiiki polycrystalline nke na-egosipụta nkwụsi ike dị ịrịba ama, kemịkalụ inertness, na nkwụsi ike thermal.
Isi ọkwa kristal na bọọlụ alumina na-arụ ọrụ dị elu bụ α-alumina, nke na-anabata ụdị corundum-ụdị hexagonal dị nso na-akpachi anya ebe ion aluminum dị arọ na-ebi ụzọ abụọ n'ụzọ atọ nke interstices octahedral n'ime ikuku oxygen anion lattice., na-enye ike latticework dị elu na iguzogide mgbanwe ogbo.
Bọọlụ alumina nke ụlọ ọrụ n'ozuzu gụnyere 85% ka 99.9% Al Abụọ O Ise, na ịdị ọcha na-emetụta ike n'ibu, tinye nguzogide, na arụmọrụ corrosion.
Àgwà dị elu nke ịdị ọcha (≥ 95% Al ₂ O Ise) na-sintered na nso-theoretical ọkpụrụkpụ (> 99%) na-eji usoro dị elu dị ka sintering na-enweghị nrụgide ma ọ bụ ịkwanye isostatic na-ekpo ọkụ, ibelata porosity na nsogbu intergranular nke nwere ike rụọ ọrụ dị ka ihe na-akpata nchegbu.
Ihe microstructure pụtara bụ nke ọma, mkpụrụ ọka equiaxed n'otu n'otu gbasasịa n'ime olu, na ọka akụkụ n'ozuzu dịgasị iche iche si 1 ka 5 micrometer, emelitere iji mee ka isi ike na ike sie ike.
1.2 Profaịlụ akụrụngwa na arụrụ arụ
A na-ama okirikiri seramiiki alumina maka nkwụsi ike ha siri ike– Achọpụtara na gburugburu 1800– 2000 HV na ọnụ ọgụgụ Vickers– karịrị ọtụtụ nchara na tungsten carbide na-asọ mpi, na-eme ka ha dị mma maka gburugburu ebe na-eyi akwa.
Ike mkpakọ ha dị elu (ruo 2500 MPa) na-eme ka nchekwa akụkụ dị n'okpuru ibu, ebe mbelata contortion na-agbanwe agbanwe na-akwalite nkenke n'ịtụgharị na ngwa-egweri.
N'agbanyeghị ha brittleness ikwu ọla, okirikiri alumina na-egosipụta ike mgbaji pụrụiche maka seramiki, ọkachasị mgbe a na-achịkwa mmepe ọka n'oge niile.
Ha na-echekwa ịkwụwa aka ọtọ n'usoro n'usoro n'usoro oke okpomọkụ, site na nsogbu cryogenic dị ka 1600 Celsius C na oxidizing ambiences, karịrị oke okpomọkụ nke polymer ma ọ bụ nchara dakọtara.
Ọzọkwa, ọnụọgụ mgbasawanye ọkụ ha dị ala (~ 8 × 10 ⁻ / K) na-ebelata ike ịma jijiji thermal, na-eme ka ojiji na-agbanwe ngwa ngwa ọkụ gburugburu dị ka kilns na okpomọkụ mgbanwe.
2. Usoro nrụpụta na njikwa ogo
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2.1 Usoro nhazi na ime ihe
Mmepụta nke alumina ceramic spheres na-amalite na ntụ ntụ alumina dị elu, a na-esikarị na bauxite calcined ma ọ bụ hydrates nwere kemịkal, nke a ghere oghe iji rụzuo oke nke submicron bit na nkesa akụkụ dị gịrịgịrị.
A na-emepụta ntụ ntụ n'ime ahụ gburugburu gburugburu ebe obibi na-eji usoro dịka extrusion-spheronization, ịgba ihicha, ma ọ bụ gburugburu na-eto eto na-atụgharị pans, na-adabere na nha achọrọ na oke setịpụrụ.
Mgbe ịkpụzi, ngalaba-eco-enyi na enyi na-amalite usoro ike ọgwụgwụ nke na-agbaso site na ikpo ọkụ dị elu., na-adịkarị n'etiti 1500 Celsius C na 1700 Celsius C, ebe usoro mgbasa ozi na-eme ka densification na ịchịkọta ọka.
Njikwa akọwapụtara nke gburugburu sintering (ikuku ma ọ bụ ikuku oxygen na-achịkwa akụkụ nrụgide), ọnụ ụlọ kpo oku, na oge obibi dị oke mkpa iji nweta mbelata otu, gburugburu geometry, na obere ntụpọ dị n'ime.
Maka ngwa arụmọrụ dị oke elu, usoro ọgwụgwọ post-sintering dị ka ọkụ isostatic pushing (HIP) enwere ike iwepụ microporosity fọdụrụnụ ma mee ka ọ dịkwuo mma n'ibu.
2.2 Mmecha nke ziri ezi yana nkwenye n'usoro ọmụmụ
Na-akwado sintering, A na-agbatu okirikiri alumina ma na-egbuke egbuke site na iji mgbasa ozi diamond-impregnated iji nweta nkwụsi ike n'akụkụ akụkụ yana mkpuchi elu nke dị ka bọọlụ ígwè na-ebu ọkwa..
A na-agbadakarị ebe adịghị ike nke dị n'elu ruo obere karịa 0.05 μm Ra, na-ebelata esemokwu na iyi n'ọnọdụ oku dị egwu.
Ihe njiri mara mma dị oke mkpa bụ nke spericity (enweghị nkwekọrịta site na satiation dị mma), dayameta mgbanwe, nkwụsi ike elu, na ọkpụrụkpụ edo edo, Nke ọ bụla n'ime ha kpebisiri ike iji interferometry anya, hazie akụrụngwa na-achọpụta ihe (CMM), na profilometry laser.
Ụkpụrụ mba ụwa dịka ISO 3290 na ANSI/ABMA na-akọwapụta akara nguzogide maka akụkụ seramiiki ejiri na bearings, na-ekwe nkwa mgbanwe na ịdị n'otu arụmọrụ n'ime ndị na-ebubata ya.
A na-eji usoro nnwale na-adịghị emebi emebi dị ka nyocha ultrasonic ma ọ bụ X-ray microtomography iji chọpụta mgbawa dị n'ime, oghere, ma ọ bụ mgbakwunye nwere ike imebi ntụkwasị obi na-adịgide adịgide.
3. Uru bara uru n'ime akụkụ igwe ọla na polymer
3.1 Nguzogide kemịkalụ na nchara na gburugburu Harsh
Otu n'ime uru kachasị ukwuu nke bọọlụ seramiiki alumina bụ nguzogide ha na mwakpo kemịkal..
Ha na-aga n'ihu na-adịghị adị na ịdị adị nke acid siri ike (ma e wezụga hydrofluoric acid), antacid, organic mgbaze, na nhọrọ saline, na-eme ka ha dị mma maka iji kemịkalụ njikwa, mmepụta ọgwụ, na ngwa mmiri ebe ihe nchara ga-emebi ngwa ngwa.
Inertness a na-egbochi mmetọ nke mgbasa ozi nwere mmetụta, ihe dị mkpa na nhazi nri, semiconductor mmepụta, na ngwaọrụ biomedical.
Unlike steel rounds, alumina does not create corrosion or metallic ions, making sure process pureness and lowering maintenance regularity.
Their non-magnetic nature better extends applicability to MRI-compatible devices and digital assembly lines where magnetic interference need to be stayed clear of.
3.2 Use Resistance and Long Service Life
In abrasive or high-cycle settings, alumina ceramic spheres exhibit wear rates orders of magnitude less than steel or polymer choices.
This remarkable durability converts right into extended solution intervals, decreased downtime, and lower total price of possession regardless of higher initial purchase prices.
They are widely made use of as grinding media in round mills for pigment dispersion, mineral processing, and nanomaterial synthesis, ebe inertness ha na-egbochi mmetọ na nkwụsi ike ha na-eme ka mbelata nha nha nha dị irè.
Na n'ibu akara na valvụ akụkụ, okirikiri alumina na-edobe oke nnabata n'ofe okirikiri na-enweghị atụ, na-eguzosi ike n'ihe na-agbaji site na mmiri mmiri na-ebujuru.
4. Ngwa ụlọ ọrụ na-ebilite
4.1 Nri, Mkpuchi, na Sistemụ Njikwa Liquid
Alumina seramiiki sphere dị mkpa maka ngwakọ sphere bearings, ebe a na-ejikọta ya na ígwè ma ọ bụ silicon nitride agbụrụ iji tinye njupụta dị ala na nchara nchara nke seramiki na ike nke ọla..
Obere ọkpụrụkpụ ha (~ 3.9 g/cm abụọ, gbasara 40% Mkpa ọkụ karịa ígwè) na-ewetu ibu centrifugal n'ọsọ ntụgharị dị elu, na-eme ka ọrụ ngwa ngwa dị ngwa site na iji ọgbọ ọkụ belatara ma kwalite nrụpụta ike.
A na-eji ụdị bearings dị otú ahụ na spindles dị elu, eze aka, na sistemụ ikuku ebe ntụkwasị obi n'okpuru ọnọdụ siri ike dị mkpa.
Na ngwa njikwa mmiri mmiri, Bọọlụ alumina na-arụ ọrụ dị ka ihe nlele nkwụsị na nfuli na ngwaọrụ igwe, kpọmkwem maka kemịkalụ ike ike, mmiri dị elu, ma ọ bụ ultra-high agụụ sistemu.
Elu ha dị larịị na nchekwa akụkụ ha na-ekwe nkwa na enwere ike ịchebe arụmọrụ yana iguzogide agụụ ma ọ bụ ịrapara.
4.2 Usoro ihe omumu, Ike, na eji teknụzụ ọgbara ọhụrụ dị elu
Ọrụ ụlọ ọrụ ọkọlọtọ gara aga, Alumina seramiiki okirikiri na-achọta ojiji na ntinye biomedical na akụrụngwa nyocha n'ihi ndakọrịta biocompatibility na radiolucency ha..
A na-eji ha na nkwonkwo mmadụ mere na prosthetics eze ebe a ga-ebelata ihe ndị na-eyi uwe iji kwụsị nzaghachi mkpali..
Na sistemu ike, ha na-arụ ọrụ dị ka inert tracers na nchekwa tank nkọwa ma ọ bụ dị ka okpomọkụ-kwụsi ike ọcha na-elekwasị anya anyanwụ ike anyanwụ na gas mgbakọ..
Ọmụmụ nyocha na-enyochakwa bọọlụ alumina arụrụ arụ maka nkwado catalytic, ihe mmetụta unit components, na njirisi nhazi nkenke n'obosara.
Na nchịkọta, Bọọlụ seramiiki alumina na-egosipụta ka seramiki ọhụrụ si ejikọta ọdịiche dị n'etiti ịdị ike n'usoro na izi ezi bara uru..
Ngwakọta siri ike nke otu-nke-a-ụdị ha, kemịkalụ inertness, thermal nche, na nha nha nha na-eme ka ha bụrụ ihe dị mkpa na sistemụ injinịa ama ama n'ofe mpaghara dị iche iche.
Dị ka mmepụta usoro na-anọgide na-emeziwanye, A na-atụ anya ka arụmọrụ ha na oke itinye n'ọrụ ga-abawanye nke ọma na teknụzụ ọgbara ọhụrụ nke ọgbọ na-abịa.
5. Onye na-enye
Advanced Ceramics tọrọ ntọala na October 17, 2012, bụ ụlọ ọrụ teknụzụ dị elu kwadoro nyocha na mmepe, mmepụta, nhazi, ahịa na teknuzu ọrụ nke seramiiki ikwu ihe dị ka Alumina seramiiki bọọlụ. Ngwaahịa anyị gụnyere mana ọnweghị oke na ngwaahịa seramiiki Boron Carbide, Ngwaahịa seramiiki boron nitride, Ngwaahịa seramiiki Silicon Carbide, Ngwaahịa seramiiki silicon Nitride, Ngwaahịa seramiiki Zirconium Dioxide, wdg. Ọ bụrụ na ị nwere mmasị, biko nweere onwe gị ịkpọtụrụ anyị.([email protected])
Tags: bọọlụ alumina,bọọlụ alumina,alumina seramiiki bọọlụ
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