Cov khoom, kev siv thiab kev npaj ntawm yttrium oxide

Crystal qauv ntawmyttrium oxide

Yttrium oxide (Y₂O₃) yog dawbtsawg ntiaj teb oxideinsoluble 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 rooj ntawmY₂O₃

Crystal Structure Diagram ntawm Y₂O₃

Lub cev thiab tshuaj muaj zog ntawmyttrium oxide

(1) molar mass yog 225.82g / mol thiab qhov ceev yog 5.01g / cm³;

(2) Melting point 2410 ℃, boiling point 4300 ℃, zoo thermal stability;

(3) Zoo lub cev thiab tshuaj 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) Lub optical transparency ntau yog dav (0.29 ~ 8μm), thiab theoretical transmittance nyob rau hauv cheeb tsam pom tau mus txog ntau tshaj 80%;

(6) Lub zog phonon tsawg, thiab lub siab tshaj plaws ntawm Raman spectrum nyob ntawm 377cm^-1, uas muaj txiaj ntsig los txo qhov tshwm sim ntawm kev hloov pauv tsis muaj hluav taws xob thiab txhim kho 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.

Main siv ntawmyttrium oxide

Yttrium oxideRaws li cov khoom siv ntxiv, yog siv dav hauv thaj chaw atomic zog, aerospace, fluorescence, electronics, high-tech ceramics thiab lwm yam vim nws cov khoom zoo heev hauv lub cev xws li siab dielectric tas li, zoo kub tsis kam thiab muaj zog corrosion kuj.

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 pom 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 ntawmyttrium oxidehmoov

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

Covtsawg ntiaj teb oxidenpaj los ntawm oxalate nag lossis daus txoj kev muaj qhov zoo ntawm high crystallization degree, zoo siv lead ua daim ntawv, ceev filtration 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 oxidenyob 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. Yuav 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 ntawmtsawg ntiaj tebnyob 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, spheroidizedyttrium oxide nanoparticlesyuav muaj ntau dua qhov chaw saum npoo, lub zog nto, zoo dua fluidity thiab dispersity, uas yog tsim nyog tsom rau.