Yakakosha isingawanzo makemikari epasi: Ndeapi mashandisirwo eyttrium oxide poda?

Yakakosha isingawanzo makemikari epasi: Ndeapi mashandisirwo eyttrium oxide poda?

Rare Earth inzvimbo yakakosha zvakanyanya, uye ine basa risingadzoreki mukugadzirwa kwemaindasitiri.Girazi remotokari, nyukireya magineti resonance, optical fiber, liquid crystal display, nezvimwewo hazviparadzaniswe kubva pakuwedzerwa kwepasi risingawanzo.Pakati pazvo, yttrium (Y) ndeimwe yezvinhu zvisingawanzo pasi pesimbi uye imhando yegrey simbi.Zvisinei, nekuda kwehuwandu hwayo hwepamusoro muhutu hwepasi, mutengo hauna kudhura uye unoshandiswa zvakanyanya.Mukugadzirwa kwemazuva ano kwevanhu, inonyanya kushandiswa munharaunda yeyttrium alloy uye yttrium oxide.

Sravana Sameeralu Serial 4th Yttrium Metal
Pakati pavo, yttrium oxide (Y2O3) ndiyo inonyanya kukosha yttrium compound.Iyo isinganyungudika mumvura uye alkali, inonyungudika muasidhi, uye ine chitarisiko chewhite crystalline poda (iyo crystal chimiro ndeye cubic system).Iine kunyatsogadzikana kwemakemikari uye iri pasi pevacuum.Low volatility, high heat resistance, corrosion resistance, high dielectric, transparency (infrared) nezvimwe zvakanakira, saka yakashandiswa mundima dzakawanda.Ndedzipi dzakananga?Ngatitarisei.

Iyo crystal chimiro cheyttrium oxide

01 Synthesis yeyttrium yakagadzikana zirconia powder.Kuchinja kwechikamu chinotevera kuchaitika panguva yekutonhodzwa kweZrO2 yakachena kubva pakupisa kwepamusoro kusvika kune tembiricha yekamuri: cubic phase (c) → tetragonal phase (t) → monoclinic phase (m), apo t ichaitika pa1150 ° C → m phase shanduko, inoperekedzwa nevhoriyamu yekuwedzera inosvika 5%.Zvisinei, kana t→ m chikamu chekushandura nzvimbo yeZrO2 yakagadzikana kusvika kukushisa kwekamuri, t→ m chikamu chekushandura chinokonzerwa nekushungurudzika panguva yekutakura. , kuitira kuti zvinhu zviratidze simba risingawanzoitiki rekutsemuka, kuitira kuti zvinyorwa zviratidze kusimba kwepamusoro-soro, zvichiita kuti chikamu chekushandura chiomerwe, uye kuoma kwepamusoro uye kuramba kwekupfeka.sex.

Kuti uwane shanduko yekuchinja kuomeswa kwe zirconia ceramics, imwe stabilizer inofanirwa kuwedzerwa uye pasi pemamwe mamiriro ekupfura, iyo yakakwirira-tembiricha yakagadzika chikamu-tetragonal meta-kudzikamisa kune tembiricha yekamuri, inowana tetragonal chikamu chinogona kushandurwa-chikamu pane tembiricha. .Ndiyo inogadzirisa maitiro e stabilizers pa zirconia.Y2O3 ndiyo yakanyanya kutsvagirwa zirconium oxide stabilizer kusvika parizvino.Iyo sintered Y-TZP zvinhu zvine hunyanzvi hwekugadzira zvinhu pakupisa kwekamuri, kusimba kwepamusoro, kusimba kwakanaka kwekutsemuka, uye saizi yezviyo mumubatanidzwa wayo idiki uye yunifomu, saka ine yakakwevera ngwariro yakawanda.02 Sintering aids Kunyungudutswa kweakawanda akakosha maceramics kunoda kutora chikamu kwezviyamuro zvekupisa.Basa rekubatsira sintering rinogona kupatsanurwa kuita zvikamu zvinotevera: kugadzira mhinduro yakasimba neiyo sinter;Dzivisa shanduko yekristaro fomu;inhibisa kristall zviyo kukura;gadzira chikamu chemvura.Semuenzaniso, mukupisa kwealumina, magnesium oxide MgO inowanzowedzerwa se microstructure stabilizer panguva yekupisa.Inogona kunatsa zviyo, kuderedza zvakanyanya kusiyana kwezviyo muganhu simba, kuderedza anisotropy yezviyo kukura, uye inhibit Discontinuous zviyo kukura.Sezvo MgO ichinyanya kuvhiringika pakupisa kwepamusoro, kuitira kuti uwane mhedzisiro yakanaka, Yttrium oxide inowanzosanganiswa neMgO.Y2O3 inogona kunatsa zviyo zvekristaro uye kukurudzira sintering densification.03YAG powder synthetic yttrium aluminium garnet (Y3Al5O12) isanganiswa yakagadzirwa nevanhu, isina zvicherwa, isina ruvara, Mohs yakaoma inogona kusvika 8.5, melting point 1950 ℃, isinganyunguriki mu sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, etc. tembiricha yakakwirira yakasimba chikamu nzira inzira yechinyakare yekugadzira YAG hupfu.Maererano nereshiyo inowanikwa mubhinary phase diagram yeyttrium oxide uye aluminium oxide, mapoda maviri aya anosanganiswa uye anopiswa pakupisa kwakanyanya, uye YAG poda inoumbwa kuburikidza neiyo yakasimba. -phase reaction pakati pemaokisi.Pasi pemamiriro ekupisa kwepamusoro, mukuita kwealumina uye yttrium oxide, mesophases YAM neYAP ichatanga kuumbwa, uye pakupedzisira YAG ichaumbwa.

Iyo yepamusoro-tembiricha yakasimba-chikamu nzira yekugadzirira YAG hupfu ine akawanda maapplication.Semuenzaniso, saizi yayo yeAl-O bond idiki uye simba rebhondi rakakwirira.Pasi pesimba rema electrons, iyo optical performance inochengetwa yakagadzikana, uye kuiswa kwezvinhu zvisingawanzo pasi pasi kunogona kuvandudza zvakanyanya luminescence performance ye phosphor.Uye YAG inogona kuva phosphor ne doping ine trivalent isingawanzo ion pasi seCe3 + uye Eu3 +.Uye zvakare, YAG kristaro ine kujeka kwakanaka, kugadzikana kwakanyanya kwemuviri uye makemikari zvimiro, yakakwirira mechanicha simba, uye yakanaka yekupisa inokambaira kuramba.Iyo laser crystal zvinhu ine huwandu hwakawanda hwekushandisa uye kuita kwakaringana.

YAG crystal 04 yakajeka ceramic yttrium oxide yagara iri yekutarisisa kwekutsvaga mumunda weakajeka ceramics.Iyo ndeye cubic crystal system uye ine isotropic optical zvimiro zveimwe axis.Kuenzaniswa neanisotropy yealumina yakajeka, chifananidzo chacho hachina kukanganisa, saka Zvishoma nezvishoma, yakave yakakosha uye yakagadziridzwa nepamusoro-soro lenses kana mauto optical windows.Hunhu hukuru hwehunhu hwayo hwepanyama nemakemikari ndeiyi: ①Yakakwira kunyungudika,Iyo kemikari uye kugadzikana kwepikicha yakanaka, uye iyo yekuona pachena siyana yakafara (0.23~8.0μm);②Pa1050nm, iyo refractive index yakakwira se1.89, iyo inoita kuti ive neiyo theoretical transmittance inopfuura 80%;③Y2O3 ine zvakakwana kugashira vazhinji. ;④Iyo phonon simba yakadzikira, uye yakanyanya kuchekwa-fononi frequency inosvika 550cm-1.Iyo yakaderera phonon simba inogona kudzvinyirira mukana weiyo isiri-radiative shanduko, kuwedzera mukana wekuchinja kwemwaranzi, uye kunatsiridza luminescence quantum Kubudirira;⑤High thermal conductivity, ingangoita 13.6W/(m·K), high thermal conductivity yakanyanyisa

yakakosha kwairi seyakasimba laser yepakati zvinhu.

Yttrium oxide transparent ceramics yakagadzirwa neJapan's Kamishima Chemical Company

Iyo yekunyungudika yeY2O3 inenge 2690 ℃, uye sintering tembiricha pakamuri tembiricha inenge 1700 ~ 1800 ℃.Kuti uite chiedza-chinotumira ceramics, zviri nani kushandisa kupisa kupisa uye sintering.Nekuda kwehunhu hwayo hwakanaka hwemuviri uye kemikari, Y2O3 yakajeka ceramics inoshandiswa zvakanyanya uye inogona kugadzirwa, kusanganisira: missile infrared windows uye domes, inooneka uye infrared lenses, high-pressure gas discharge marambi, ceramic scintillators, ceramic lasers nezvimwe minda.