1. Kimiyya da Tsarin Kayan Alumina Porcelain
1.1 Crystallography da Siffofin Haɗuwa na Hasken Aluminum Oxide
(Alumina Ceramics Rings)
Ana samar da zoben yumbu na alumina daga aluminum oxide mai nauyi (Al biyu YA UKU), wani abu sananne saboda fitaccen ma'aunin ƙarfin injinsa, thermal tsaro, da wutar lantarki.
Mafi madaidaicin kwanciyar hankali kuma matakin da ya dace da masana'antu na alumina shine alpha (a) mataki, wanda ke ɗaukar siffa a cikin madaidaicin madaidaicin hexagonal (HCP) tsarin mallakar gidan lu'u-lu'u.
A cikin wannan shiri, ions oxygen suna samar da lattice mai yawa tare da ions aluminum wanda ke mamaye kashi biyu bisa uku na wuraren tsaka-tsakin octahedral., haifar da ingantaccen tsari mai ƙarfi da ƙarfi.
Yayin da alumina mai tsabta yana cikin ka'idar 100% Al ₂ O ₃, Samfuran masana'antu akai-akai suna ƙunshe da ƙananan ɓangarorin abubuwan ƙari kamar silica (SiO ₂), magnesiya (MgO), ko yttria (Y ₂ YA UKU) don daidaita haɓakar hatsi a duk lokacin sintiri da haɓaka ƙima.
Alumina yumbura an rarraba su ta matakan tsabta: 96%, 99%, kuma 99.8% Al Biyu O biyar na kowa, tare da mafi girma tsarki hade da ingantattun kayan aikin injiniya, thermal watsin, da juriya na sinadarai.
A microstructure– musamman girman hatsi, porosity, da kuma lokaci wurare dabam dabam– yana taka muhimmiyar rawa wajen gano aikin ƙarshe na zoben alumina a cikin wuraren sabis.
1.2 Dabarun Jiki da Kayayyakin Injini
Zoben yumbu na alumina suna nuna rukunin gine-gine waɗanda ke sanya su mahimmanci a cikin buƙatar saitunan masana'antu.
Suna da ƙarfin ƙarfi mai ƙarfi (kamar yadda 3000 MPa), ƙarfin sassauƙa (kullum 350– 500 MPa), da ingantaccen ƙarfi (1500– 2000 HV), yana ba da damar juriya don amfani, abrasion, da nakasawa a karkashin kuri'a.
Su low coefficient na thermal fadadawa (kusan 7– 8 × 10 ⁻ / K) yana ba da tsaro ga ma'auni a cikin ɗimbin matakan zafin jiki, rage tashin hankali na thermal da karyewa yayin hawan keken thermal.
Thermal conductivity iri daga 20 ku 30 W/m · K, dangane da tsarki, ba da izini ga matsakaicin zafi mai zafi– isa ga kuri'a na babban zafin aikace-aikace ba tare da buƙatun don kwantar da iska mai kuzari ba.
( Alumina Ceramics Ring)
Lantarki, alumina wani keɓaɓɓen insulator ne wanda ke da ƙarfin juriya da yawa 10 ¹⁴ Ω · santimita da ƙarfin kuzari na kusan 10– 15 kV/mm, yin shi cikakke ga manyan abubuwan rufewa na lantarki.
Haka kuma, alumina yana nuna juriya mai kyau ga harin sinadarai daga acid, antacid, da narkakkar karafa, ko da yake yana da saukin kamuwa da hari ta m antacid da hydrofluoric acid a yanayin zafi.
2. Ƙirƙira da Daidaitaccen Injiniya na Alumina Rings
2.1 Maganin Foda da Hanyoyin Siffatawa
Samar da babban aiki alumina yumbu zoben zoben fara tare da zaɓi da kuma shirye-shiryen aikin babban-tsarki alumina foda..
Ana yin foda yawanci ta hanyar ƙirƙira na aluminum hydroxide ko ta hanyoyin ci gaba kamar sarrafa sol-gel don cimma girman girman ɗan ƙarami da kunkuntar girman rarraba..
Don ƙirƙirar geometry na zobe, Ana amfani da hanyoyin siffa da yawa, ciki har da:
Uniaxial turawa: inda aka matsa foda a cikin mutuƙar matsin lamba don haɓaka a “m yanayi” zobe.
Isostatic latsawa: ta amfani da matsa lamba iri ɗaya daga duk umarnin ta amfani da matsakaicin ruwa, yana haifar da mafi girman kauri da ƙarin daidaiton ƙananan tsarin, musamman ga hadaddun ko manyan zobba.
Extrusion: dace da dogayen nau'ikan cylindrical waɗanda aka rage daga baya daidai cikin zobba, yawanci ana amfani da su don ƙananan aikace-aikace.
Gyaran allura: ana amfani da shi don ƙayyadaddun geometries da iyakantaccen haƙuri, inda aka hada foda alumina tare da mai ɗaure polymer kuma a yi masa allura a cikin mold.
Kowace hanya tana rinjayar kauri na ƙarshe, daidaitaccen hatsi, da matsalar zagayawa, yana buƙatar zaɓin tsari na taka tsantsan dangane da buƙatun aikace-aikacen.
2.2 Sintering da Microstructural Ci gaban
Bayan kafa, zoben da suka dace da muhalli suna jure yanayin zafi mai zafi, gaba daya a tsakanin 1500 ° C da 1700 ° C a cikin iska ko wuraren da aka tsara.
A lokacin sintering, na'urorin watsawa suna fitar da gaɓoɓin ɓarna, cire pore, da bunkasar hatsi, yana haifar da jikin yumbu mai yawa.
Yawan dumama, rike lokaci, kuma ana sarrafa bayanin martaba daidai don hana fashewa, lankwasawa, ko karin gishiri ci gaban hatsi.
Sinadaran irin su MgO yawanci ana gabatar da su don hana iyakantaccen sassaucin hatsi, haifar da ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan tsari wanda ke inganta ƙarfin injiniya da aminci.
Post-sintering, zoben alumina na iya jurewa da niƙa da fantsama don cika juriya mai ƙarfi ( ± 0.01 mm) kuma ultra-smooth surface area ƙare (Ra < 0.1 µm), essential for securing, bearing, and electrical insulation applications.
3. Ayyukan Ayyuka da Aikace-aikacen Masana'antu
3.1 Aikace-aikacen Injini da Tribological
Ana amfani da zoben yumbura na alumina sosai a cikin tsarin injina sakamakon juriyarsu da kwanciyar hankali.
Aikace-aikacen sirri sun haɗa da:
Rufe zobba a cikin famfo da kashewa, inda suke tsayayya da tarwatsewa daga rashin jin daɗi da ruwa mai lalata a cikin sarrafa sinadarai da mai. & masana'antun gas.
Abubuwan Haihuwa a cikin saitunan sauri ko ɓarna inda ƙullun ƙarfe zai raunana ko buƙatar mai na yau da kullun.
Dubi zoben zobe da bushings a cikin kayan aikin sarrafa kansa, ta yin amfani da ƙananan juzu'i da tsawon rayuwar sabis ba tare da buƙatar man shafawa ba.
Yi amfani da zobba a cikin compressors da turbines, raguwar sharewa tsakanin jujjuyawa da abubuwan da ke tsaye a ƙarƙashin matsalolin matsa lamba.
Ƙarfinsu na kiyaye inganci a cikin busassun yanayi ko maƙiya na kemikal yana sa su zarce zaɓin ƙarfe da polymer da yawa..
3.2 Ayyukan Insulation na thermal da Lantarki
A cikin babban zafin jiki da tsarin wutar lantarki, zoben alumina suna aiki azaman sassa masu kariya masu mahimmanci.
Ana amfani da su azaman:
Insulators a cikin abubuwan dumama da abubuwan tanderu, inda suke jurewa igiyoyi yayin jure yanayin zafi 1400 ° C.
Ciyar da insulators a cikin injin tsabtace ruwa da tsarin plasma, guje wa harba wutar lantarki yayin kiyaye hatimin hermetic.
Masu sarari da goyan bayan zoben lantarki a cikin na'urorin lantarki da masu sauyawa, raba conductive sassa a cikin gidajen wuta, magudanar ruwa, da tsarin basbar.
Dielectric zoben a cikin RF da microwave kayan aikin, inda rashin ƙarancin wutar lantarki da rashin ƙarfi mai ƙarfi ya tabbatar da siginar gaskiya.
Haɗuwa da tsananin ƙarfi na dielectric da tsaro na thermal yana ba da damar zoben alumina suyi aiki daidai a cikin yanayi inda insulators na zahiri zasu raunana..
4. Ƙirƙirar Samfura da Mahimmanci na gaba
4.1 Compound da Doped Alumina Solutions
Don ƙarin haɓaka aiki, masu bincike da masana'antun suna ƙirƙirar abubuwan haɓaka na tushen alumina.
Misalai sun haɗa da:
Alumina-zirconia (Al ₂ O HUDU-ZrO BIYU) composites, wanda ke nuna ingantattun tsattsauran ra'ayi tare da na'urori masu ƙarfafa canji.
Alumina-silicon carbide (Al ₂ O SIX-SiC) nanocomposites, inda SiC masu girman nano ke haɓaka ƙarfi, thermal girgiza juriya, da juriya mai rarrafe.
Alumina mai ƙarancin ƙarfi-ƙasa, wanda zai iya canza sinadarai kan iyakokin hatsi don inganta ƙarfin zafin jiki mai ƙarfi da juriya na iskar shaka.
Waɗannan kayan haɗin gwiwar suna tsawaita ambulaf ɗin aiki na zoben alumina daidai cikin matsaloli masu tsanani, kamar babban matsi mai ƙarfi mai ƙarfi ko hawan keke mai zafi mai sauri.
4.2 Fads masu tasowa da Haɗin Fasaha
Makomar zoben yumbura alumina ya ta'allaka ne a cikin haɗin kai mai hikima da masana'anta daidaito.
Abubuwan da ke faruwa sun haɗa da:
Ƙarfafa samarwa (3D bugu) na alumina sassa, ba da damar rikitattun geometries na ciki da keɓaɓɓen shimfidu na zobe a baya wanda ba za a iya cimma su ta hanyar fasaha na yau da kullun ba.
Ƙididdiga masu amfani, inda abun da ke ciki ko microstructure ya bambanta a fadin zoben don haɓaka aiki a wurare daban-daban (misali, Layer na waje mai jure lalacewa tare da cibiya mai ɗaukar zafi).
Bin-cikin wurin ta hanyar na'urori masu auna firikwensin a cikin zoben yumbu don kiyaye tsinkaya a cikin injinan masana'antu.
Ƙara amfani a cikin tsarin makamashi mai sabuntawa, kamar ƙwayoyin mai masu zafi mai zafi da masana'antar sarrafa hasken rana, inda amincin samfurin a ƙarƙashin zafin zafi da damuwa na sinadarai da damuwa yana da mahimmanci.
Kamar yadda kasuwanni ke buƙatar ingantaccen inganci, tsawon rai-spans, da rage kulawa, zoben yumbu na alumina tabbas za su kasance don taka muhimmiyar rawa wajen ba da damar zaɓuɓɓukan aikin injiniya na gaba..
5. Mai bayarwa
Abubuwan da aka bayar na Alumina Technology Co., Ltd., Ltd mayar da hankali kan bincike da haɓakawa, samarwa da tallace-tallace na aluminum oxide foda, aluminum oxide kayayyakin, aluminum oxide crucible, da dai sauransu., hidima da kayan lantarki, tukwane, sinadarai da sauran masana'antu. Tun lokacin da aka kafa shi a 2005, kamfanin ya himmatu wajen samarwa abokan ciniki mafi kyawun kayayyaki da sabis. Idan kana neman high quality zirconia taurin alumina, don Allah a ji daɗin tuntuɓar mu. ([email protected])
Tags: Alumina Ceramics, alumina, aluminum oxide
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