Aluminium oxide

Guryaha: Cadaan adag oo aan lagu milmi karin biyaha, aan ur lahayn, aan dhadhamin, aad u adag, fududahay in la nuugo qoyaanka iyada oo aan la delixeynin (qoyaan gubtay).Alumina waa oxide amphoteric caadiga ah (corundum waa α-qaabeeya waxayna ka tirsan tahay xirmada laba geesoodka ah ee ugu cufan, waa xarun aan shaqayn, wax yar ku milma acid iyo alkali caabbinta daxalka [1]), ku milma aashitada inorganic iyo xalalka alkaline, ku dhawaad ​​aan lagu milmi karin biyaha iyo dareerayaasha organic non-polar;Cufnaanta qaraabada (d204) 4.0;Barta dhalaalka: 2050 ℃.

Kaydinta: xidh oo engegan.

Waxa loo isticmaalaa sida reagent gorfaynta, fuuqbaxa dareeraha organic, adsorbent, kicinta falcelinta organic, abrasive, wakiilka polishing, alaabta ceeriin ee dhalaalay aluminium, refractory

Waxyaabaha ugu muhiimsan

Alumina waxay ka kooban tahay aluminium iyo oksijiin.Haddii alaabta ceeriin ee bauxite iyada oo loo marayo daaweynta kiimikada, ka saar oxides ee silikoon, birta, titanium iyo alaabada kale waa alaabta ceeriin alumina aad saafi ah, content Al2O3 guud ahaan waa in ka badan 99%.Wajiga macdanta wuxuu ka kooban yahay 40% ~ 76% γ-Al2O3 iyo 24% ~ 60% α-Al2O3.γ-Al2O3 waxay isu beddeshaa α-Al2O3 at 950 ~ 1200℃, oo leh mug yar oo mug leh.

aluminium oxide (aluminium oxide) waa nooc ka mid ah noolaha, kiimikooyinka Al2O3, waa nooc ka mid ah xeryahooda engegnaantooda sare, barta dhalaalka ee 2054 ℃, barta karkaraya ee 2980 ℃, crystal ionized heerkulka sare, inta badan loo isticmaalo soo saaridda ee alaabta refractory. .

Alumina warshadaha waxaa diyaariya bauxite (Al2O3 · 3H2O) iyo qurbo-joog.Al2O3 oo leh shuruud nadiifnimo sare leh, guud ahaan waxaa lagu diyaariyaa habka kiimikada.Al2O3 waxay leedahay heterocrystals isku mid ah oo badan, waxaa jira in ka badan 10 la yaqaan, waxaa jira inta badan 3 nooc oo crystal ah, kuwaas oo kala ah α-Al2O3, β-Al2O3, γ-Al2O3.Waxaa ka mid ah, qaab-dhismeedka iyo guryaha waa kala duwan yihiin, iyo α-Al2O3 ku dhowaad si buuxda u beddelay α-al2o3 heerkulka sare ka sarreeya 1300 ℃.

Tilmaamaha jirka

InChi = 1 / Al 2 o/rAlO ₂ / c2-1-3

Miisaanka molecular: 101.96

Meesha dhalaalka: 2054 ℃

Barta karkarinta: 2980 ℃

Cufnaanta dhabta ah: 3.97g/cm3

Cufnaanta baakad dabacsan: 0.85 g/ml (325 mesh ~0) 0.9 g/ml (120 mesh ~ 325 mesh)

Qaab dhismeedka Crystal: nidaamka saddex-geesoodka ah

Solubility: aan lagu milmi karin biyaha heerkulka qolka

Korantada korantada: Malaha korantada heerkulka qolka

Al₂O₃ waa crystal ionic

Isticmaalka qayb alumina ah ---- corundum macmal ah

Adkeysiga budada Corundum waxaa loo isticmaali karaa sida abrasive, budo dhalaalaysa, alumina heerkul sare leh, oo loo yaqaan corundum macmal ah ama dhagaxa macmalka ah, waxaa laga samayn karaa biraha farsamada ama saacadaha dheemanka.Alumina sidoo kale waxaa loo isticmaalaa sida walxaha heerkulka sare leh, samaynta lebenka refractory, crucible, porcelain, dhagaxyo macmal ah, alumina sidoo kale waa alaabta ceeriin ee aluminium dhalada.Aluminium hydroxide Calcined wuxuu soo saari karaa γ-.Gamma-al ₂O₃ (sababtoo ah xamaasad xoog leh iyo firfircoonida kicinta) waxaa loo isticmaali karaa adsorbent iyo kicin.Qaybta ugu muhiimsan ee corundum, alfa-al ₂O₃.Karis saddex geesood ah oo u eg foosto ama koofiyad.Waxay leedahay dhalaal dhalo ah ama dhalaal dheeman ah.Cufnaanta waa 3.9 ~ 4.1g/cm3, engegnaanta waa 9, barta dhalaalidu waa 2000 ± 15 ℃.Biyo aan milmin, oo asiidh iyo saldhig aan milmi karin.Iska caabbinta heerkulka sare.Jaad cad oo aan midab lahayn ayaa sheegay, oo ka kooban guduud chromium trivalent ah oo loo yaqaan Ruby;Midabka buluuga ah oo ka kooban laba -, saddex - ama afar - birta valent waxaa loo yaqaan sapphire;Ka kooban qadar yar oo ah ferric oxide madow cawl, midab madow oo loo yaqaan budada corundum.Waxa loo isticmaali karaa sida xadhkaha loo isticmaalo qalabyada saxda ah, dheemanta saacadaha, taayirada shiidada, dhaldhalaalka, refractories iyo dahaadhiyeyaasha korantada.Dhagaxyo midab leh oo dhalaalaya oo loo isticmaalo qurxinta.Maaddada laysarka ah ee loo yaqaan 'synthetic ruby'.Marka lagu daro macdanta dabiiciga ah, waxaa lagu samayn karaa hydrogen iyo oksijiinta ololka dhalaalaysa aluminium hydroxide.

Alumina dhoobada

Alumina waxay u qaybsantaa alumina calcined iyo alumina warshadeed caadi ah.Calcined alumina waa shay lagama maarmaanka u ah soo saarista lebenka qadiimiga ah, halka alumina warshadaha loo isticmaali karo wax soo saarka dhagaxa microcrystalline.glazes dhaqameed, alumina waxaa badanaa loo isticmaalaa caddayn ahaan.Isticmaalka alumina ayaa sidoo kale sii kordhaya sanadba sanadka ka dambeeya maadaama leben qadiimiga ah iyo dhagxaanta microcrystalline ay doorbidayaan suuqa.

Sidaa darteed, ceramics-ka alumina ayaa ka soo baxay warshadaha dhoobada - alumina ceramics waxay ahayd nooc ka mid ah walxaha dhoobada leh Al₂O₃ oo ah alaabta ceeriin ee ugu weyn iyo corundum oo ah wejiga ugu weyn ee crystalline.Sababtoo ah xoogga farsamada sare, qallafsanaanta sare, khasaaraha dielectric ee soo noqnoqda, caabbinta heerkulka sare, caabbinta daxalka kiimikada iyo kulaylka wanaagsan iyo faa'iidooyinka kale ee waxqabadka farsamada dhamaystiran.