Cia peb to taub lub tswvyim ntawm "tus nas"{.} Raws li cov qauv kev faib tawm thoob ntiaj tebpseudo-boehmite, boehmite, editine aluminium hydroxide, activate alumina, rov qab alumina thiab corundum txhua tus muaj rau cov tshuaj alumina .
Dab tsi peb tab tom tham txog niaj hnub no yog kev sib txheeb ntawm cov tshuaj no nrog cov tshuaj lom neeg "al2o3" thiab pseudo-boehmite thiab boehmite.
, Txawv ntawm kev sib xyaw thiab daim ntawv thov
1. AL2O3
Tam sim no, muaj ntau tshaj li kaum ob cov ntawv siv lead ua ntawm al2o3, xws li ,, Δ, Δ, δ, δ, .
- AL2O3 muaj mohs tawv ntawm txog 950 degree, ib qho kub ua hauj lwm, thiab siv cov khoom siv kub ntawm cov khoom siv hluav taws xob, thiab cov khoom siv, et1 {.}} thermal conductivity, cov ntaub ntawv me me thiab lwm yam me me.} nws yog cov khoom siv hluav taws xob zoo Kev tsim kho hluav taws xob substrates, lub txime Tube zoo li roj hmab, nrog rau cov khoom siv hluav taws xob ntau ntxiv rau cov roj teeb lithium hauv xyoo tsis ntev los no.
Crystal qauv ntawm -al2O3
-Al2o3 muaj cov yam ntxwv ntawm thaj chaw loj, kev ua yeeb yam zoo acidasive {} Nws siv tau rau hauv petrochemical, gas} Nws tuaj yeem siv hauv cov roj av ua kom qhuav, roj cua kom qhuav, muaj roj ogrocic nkim roj hmab ntxuav thiab kho thiab lwm cov teb .
-Al2o3 Crystal Qauv
2. boehmite
Boehmite (tseem hu ua monohydrate txhuas pob zeb lossis boehmite, nws cov qauv tshuaj lom neeg muaj ntau dua, yog li nws tau zoo dua thermal stability thiab tshuaj ruaj khov.
Boehmite tuaj yeem ua kom kub ua kom kub, yog li cov khoom siv hluav taws xob ua kom sov, thiab lwm yam ntxiv rau cov tshuaj ntsuab et1 {{4 4} Nws tseem tuaj yeem siv los ua cov khoom siv roj hmab muaj roj av muaj roj av muaj roj av Rwb thaiv tsev, thiab zoo sintering kev ua haujlwm. Nws tau siv ntau dua hauv lub cev, cov khoom siv ua npuas ncauj, cov khoom siv ua kom sib xyaw ua ke, thiab lwm yam.
3. pseudo-boehmite
Pseudo-boehmite yog ib qho tsis tiav ua ke nrog cov tshuaj sib xyaw ua ke thiab yog ib hom tshuaj tsis huv
Cov qauv ib txwm muaj ntawm pseudo-boehmite yog cov ntawv me me thiab tshuaj lom neeg cov khoom siv acidic {}} Cov khoom tshwj xeeb ntawm pseudo-boehmite ua rau nws dav siv nyob rau hauv ntau qhov kev lag luam . Nws yog siv los ua catalyst, cab kuj, thiab phau ntawv hauv kev lag luam roj av; Raws li cov kws nqa khoom siv rau kev kho kom huv kho cov tshuaj tiv thaiv catalysts hauv kev lag luam automotive; raws li kev ntxiv rau nplaim taws retardant cov ntaub ntawv nyob rau hauv qhov chaw tiv thaiv hluav taws; Raws li ib tug number case-nqus txheej nyob rau hauv high-qib inkjet luam ntawv ntawv hauv kev lag luam papermaking; Raws li cov roj av pleev roj, haus dej Defluorididididation, thiab cov xim pov nyab xeeb thiab tsw muaj kev tiv thaiv kev lag luam ib puag ncig; raws li txheej ntxiv nyob rau hauv kev tsim kho; thiab raws li tus neeg sawv cev txhawb nqa hauv cov ntaub ntawv sib xyaw ua ke Ceramic .
{{02. kev sib raug zoo thiab sib txawv ntawm peb
1. qhov tseeb
Theem Kev hloov pauv ntawm Alumina thiab nws cov hydleate
Alumina muaj ntau yam dab tsi uas muaj feem cuam tshuam nrog alumina {}, . - al2o3 calcined ntawm 400 thiab 700℃yog dav siv ua catalyst cov cab kuj, catalyst thiab adsorbent; -Al2o3 calcined ntawm 1100 thiab 1200 kawm tau siv nyob rau hauv high-endrochemicals thiab lwm cov teb.
Pseudobehmite tuaj yeem hloov mus rau hauv boehmite nyob rau hauv cov kev pab cuam hydrothermal ntawm qhov tseeb, pehammite yog ob qho tib si ua ntej .
2. sib txawv
Pseudobehmite muaj cov mis molecular (aloohh) raws li pseudobehmite yog ib hom peyustreedallization {}} zoo ib yam li xrd qauv, thiab txoj haujlwm ntawm lub ntsiab diffraction peaks ntawm ob yog yuav luag tib. Qhov ntau ntawm crystalctinity, siab dua nyob rau hauv crystallization {}}
XRD Spectra ntawm Pseudo-Boehmite thiab Bohoog
Kev tshawb fawb qhia tias tsis muaj ib txoj kev sib faib meej ntawm ob {}}} nws feem ntau yog suav tias yog ib qho kev sib tw nruab nrab tsawg dua 10nm tau txiav txim siab pseudo-boehmite; cov khoom lag luam nrog cov khoom nruab nrab loj dua li 50nm tau txiav txim siab behmite; thaum nruab nrab lis loj loj yog 10-50} nm, nws yog cov khoom nruab nrab thiab cov khoom nruab nrab kuj tseem tuaj yeem faib ua pseudo-boehmite.
Hauv cov ntsiab lus, qhov sib txawv ntawm ob yog raws li hauv qab no:
(1) Pseudo-Beehmite yog kev sib sau ua ke ntawm cov tshuaj amorphous nrog tsuas yog cov tsis muaj zog diffraction peaks; Boehmite muaj cov qauv siv lead ua zoo dua thiab cov ntse sib txawv? .
(2) Pseudo-boohmite muaj qhov chaw tshwj xeeb thiab ntau dua li ntawm Boehmite {2} Qhov ntau dua nrog kev nce kub.