Crystal qauv ntawm yttrium oxide
Yttrium oxide (Y2O3) yog lub ntiaj teb tsis tshua muaj oxide insoluble hauv dej thiab alkali thiab soluble hauv acid. Nws yog C-hom tsawg lub ntiaj teb sesquioxide nrog lub cev-centered cubic qauv.
Crystal parameter cov lus ntawm Y2O3
Crystal Structure Diagram ntawm Y2O3
Lub cev thiab tshuaj muaj zog ntawm yttrium oxide
(1) molar mass yog 225.82g / mol thiab qhov ceev yog 5.01g / cm3;
(2) Melting point 2410℃, kub point 4300℃, zoo thermal stability;
(3) Zoo lub cev thiab tshuaj lom neeg ruaj khov thiab zoo corrosion kuj;
(4) Lub thermal conductivity siab, uas tuaj yeem ncav cuag 27 W / (MK) ntawm 300K, uas yog kwv yees li ob npaug ntawm thermal conductivity ntawm yttrium aluminium garnet (Y3Al5O12), uas muaj txiaj ntsig zoo rau nws siv raws li laser ua haujlwm nruab nrab;
(5) Optical transparency ntau yam yog dav (0.29 ~ 8μm), thiab theoretical transmittance nyob rau hauv lub pom cheeb tsam yuav ncav cuag ntau tshaj 80%;
(6) Lub zog phonon tsawg, thiab lub siab tshaj plaws ntawm Raman spectrum nyob ntawm 377cm-1, uas yog qhov zoo los txo qhov tshwm sim ntawm kev hloov pauv tsis muaj hluav taws xob thiab txhim kho qhov kev hloov pauv luminous efficiency;
(7) Hauv qab 2200℃, Y2O3yog lub cubic theem tsis muaj birefringence. Lub refractive index yog 1.89 ntawm lub wavelength ntawm 1050nm. Hloov mus rau theem hexagonal saum 2200℃;
(8) Lub zog sib txawv ntawm Y2O3yog dav heev, mus txog 5.5eV, thiab lub zog theem ntawm doped trivalent tsawg lub ntiaj teb luminescent ions nyob nruab nrab ntawm lub valence band thiab conduction band ntawm Y.2O3thiab saum toj no Fermi zog, yog li tsim discrete luminescent chaw.
(9) Y2O3, raws li cov khoom siv matrix, tuaj yeem ua kom haum siab ntawm trivalent tsawg lub ntiaj teb ions thiab hloov Y3+ions tsis ua rau muaj kev hloov pauv ntawm cov qauv.
Kev siv tseem ceeb ntawm yttrium oxide
Yttrium oxide, raws li cov khoom siv ntxiv, yog siv dav hauv thaj chaw atomic zog, aerospace, fluorescence, electronics, high-tech ceramics thiab lwm yam vim nws lub cev zoo heev xws li siab dielectric tas li, zoo kub tsis kam thiab muaj zog corrosion. tsis kam.
Duab Source: Network
1, Raws li cov khoom siv phosphor matrix, nws yog siv rau hauv kev ua lag luam, teeb pom kev zoo thiab kos npe;
2, Raws li cov khoom siv laser nruab nrab, pob tshab ceramics nrog kev ua haujlwm siab kho qhov muag tuaj yeem npaj tau, uas tuaj yeem siv los ua laser ua haujlwm nruab nrab kom paub txog chav tsev kub laser tso zis;
3, Raws li cov khoom siv hloov pauv luminescent matrix, nws yog siv hauv kev tshawb nrhiav infrared, fluorescence labeling thiab lwm yam;
4, Ua rau pob tshab ceramics, uas tuaj yeem siv rau pom thiab infrared lo ntsiab muag, cov roj tso tawm hluav taws xob siab, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov qhov rais kub kub, thiab lwm yam.
5, Nws tuaj yeem siv los ua cov tshuaj tiv thaiv kab mob, cov khoom siv kub kub, cov khoom siv refractory, thiab lwm yam.
6, Raws li raw cov ntaub ntawv los yog additives, lawv kuj tau lug siv nyob rau hauv high-temperature superconducting cov ntaub ntawv, laser siv lead ua cov ntaub ntawv, structural ceramics, catalytic cov ntaub ntawv, dielectric ceramics, high-kev ua tau zoo alloys thiab lwm yam teb.
Txoj kev npaj ntawm yttrium oxide hmoov
Txoj kev ua kua theem dej nag feem ntau yog siv los npaj cov av tsis tshua muaj oxides, uas feem ntau suav nrog oxalate nag lossis daus txoj kev, ammonium bicarbonate los nag txoj kev, urea hydrolysis txoj kev thiab ammonia nag lossis daus txoj kev. Tsis tas li ntawd, tshuaj tsuag granulation kuj yog ib txoj kev npaj uas tau muaj kev txhawj xeeb txog tam sim no. Txoj kev ntsev los nag
1. oxalate nag lossis daus txheej txheem
Lub ntiaj teb tsis tshua muaj oxide npaj los ntawm oxalate nag lossis daus txoj kev muaj qhov zoo ntawm cov qib siab crystallization, zoo siv lead ua daim ntawv, ceev ceev ceev, tsis muaj impurity cov ntsiab lus thiab yooj yim ua hauj lwm, uas yog ib tug ntau txoj kev rau kev npaj siab purity tsawg ntiaj teb oxide nyob rau hauv industrial ntau lawm.
Ammonium bicarbonate nag lossis daus txheej txheem
2. Ammonium bicarbonate los nag txoj kev
Ammonium bicarbonate yog ib qho pheej yig precipitant. Yav dhau los, tib neeg feem ntau siv ammonium bicarbonate nag lossis daus txheej txheem los npaj cov av uas tsis tshua muaj carbonate los ntawm leaching tov ntawm tsawg lub ntiaj teb ore. Tam sim no, tsawg lub ntiaj teb oxides tau npaj los ntawm ammonium bicarbonate nag lossis daus txheej txheem hauv kev lag luam. Feem ntau, ammonium bicarbonate los nag txoj kev yog ntxiv ammonium bicarbonate cov khoom los yog cov tshuaj rau hauv cov tshuaj chloride tsawg hauv lub ntiaj teb ntawm qhov kub thiab txias, Tom qab kev laus, ntxuav, ziab thiab hlawv, cov oxide tau txais. Txawm li cas los xij, vim muaj coob tus npuas tsim thaum nag lossis daus ntawm ammonium bicarbonate thiab tsis ruaj khov pH tus nqi thaum lub sij hawm nag lossis daus, qhov nucleation tus nqi yog ceev los yog qeeb, uas tsis haum rau kev loj hlob siv lead ua. Txhawm rau kom tau txais cov oxide nrog qhov zoo tshaj plaws particle loj thiab morphology, cov tshuaj tiv thaiv yuav tsum tau tswj nruj me ntsis.
3. urea nag lossis daus
Urea nag lossis daus txoj kev yog dav siv nyob rau hauv kev npaj ntawm tsawg lub ntiaj teb oxide, uas tsis yog tsuas yog pheej yig thiab yooj yim rau kev khiav lag luam, tab sis kuj muaj peev xwm ua kom tiav kev tswj ntawm precursor nucleation thiab particle loj hlob, yog li urea nag lossis daus txoj kev tau nyiam ntau thiab ntau tus neeg. txaus siab thiab nyiam kev mloog thiab kev tshawb fawb los ntawm ntau tus kws tshawb fawb tam sim no.
4. Txau granulation
Spray granulation tshuab muaj qhov zoo ntawm kev siv tshuab siab, kev ua haujlwm siab thiab kev ua haujlwm siab ntawm cov hmoov ntsuab, yog li cov tshuaj tsuag granulation tau dhau los ua cov txheej txheem siv hmoov granulation.
Nyob rau hauv xyoo tas los no, kev noj ntawm lub ntiaj teb tsis tshua muaj nyob rau hauv ib txwm teb tsis tau hloov pauv, tab sis nws daim ntawv thov nyob rau hauv cov ntaub ntawv tshiab tau nce obviously. Raws li cov khoom siv tshiab, nano Y2O3muaj ib daim ntawv thov dav dua. Niaj hnub no, muaj ntau txoj hauv kev los npaj nano Y2O3Cov ntaub ntawv, uas tuaj yeem muab faib ua peb pawg: cov txheej txheem ua kua theem, cov txheej txheem roj theem thiab cov txheej txheem txheej txheem, cov txheej txheem ua kua theem yog siv dav tshaj plaws.Lawv muab faib ua cov tshuaj tsuag pyrolysis, hydrothermal synthesis, microemulsion, sol-gel, combustion. synthesis thiab nag lossis daus. Txawm li cas los xij, spheroidized yttrium oxide nanoparticles yuav muaj qhov tshwj xeeb ntawm thaj chaw ntau dua, lub zog saum npoo, zoo dua fluidity thiab dispersity, uas tsim nyog tsom rau.
Lub sij hawm xa tuaj: Plaub Hlis-04-2022