Lanthanum oxide,molecular formulalwj 2o3molecular hnyav 325.8091. Feem ntau yog siv rau kev tsim precision optical iav thiab optical fibers.
Cov cuab yeej tshuaj
Me ntsis soluble nyob rau hauv dej thiab yooj yim soluble nyob rau hauv acids los tsim cov ntsev sib xws.
Tawm mus rau saum huab cua, nws yooj yim nqus carbon dioxide thiab dej, maj mam tig mus rau hauv lanthanum carbonate.
Qhov kublanthanum oxideua ke nrog dej kom tso cov cua kub ntau.
khoom ntiag tug
Cov tsos mob thiab cov yam ntxwv: Dawb hmoov hmoov.
Ceev: 6.51 g / mL ntawm 25 ° C
Melting point: 2315 ° C, boiling point: 4200 ° C
Solubility: Soluble nyob rau hauv acids thiab ammonium chloride, insoluble nyob rau hauv dej thiab ketones.
Txoj kev tsim khoom
1. Cov khoom siv raw rau txoj kev rho tawm yog cov tshuaj tsis tshua muaj hauv ntiaj teb nitrate tom qab tshem tawm cov cerium, uas muaj kwv yees li 50% La2O3, cov lej ntawm CeO2, 116-7% Pr6O5, thiab 30% Nd2O3. Compounded rau hauv Σ Ib lub ntiaj teb tsis tshua muaj nitrate tov nrog ib tug concentration ntawm 320-330g / L ntawm RxOy tau muab rho tawm thiab sib cais los ntawm lwm yam tsawg ntiaj teb siv ib tug nruab nrab phosphine extractant, dimethyl heptyl methylphosphonate (P350), nyob rau hauv ib tug P350 kerosene system rau 35-38 theem. ntawm extraction. Cov tshuaj residual uas muaj lanthanum yog neutralized nrog ammonia, precipitated nrog oxalic acid, thiab ces lim thiab hlawv kom tau ib tug tiav cov khoom ntawm lanthanum oxide. Extracted los ntawm lanthanum phosphate cerium ore los yog npaj los ntawm hlawv lanthanum carbonate los yog nitrate. Nws tseem tuaj yeem tau txais los ntawm cua sov thiab decomposing oxalate ntawm lanthanum.
2. Muab La (OH) 3 tso rau hauv lub platinum crucible, qhuav ntawm 200 ℃, hlawv ntawm 500 ℃, thiab decompose tshaj 840 ℃ kom tau lanthanum oxide.
Daim ntawv thov
Feem ntau yog siv rau kev tsim precision optical iav thiab optical fibers. Kuj tseem siv nyob rau hauv kev lag luam hluav taws xob li ceramic capacitors thiab piezoelectric ceramic additives. Nws kuj yog siv los ua cov khoom siv raw rau kev tsim cov lanthanum borate thiab ua cov khoom siv roj av sib cais thiab ua kom zoo dua qub.
Daim ntawv thov teb: Feem ntau yog siv rau kev tsim tshwj xeeb alloy precision optical iav, siab refractive optical fiber board, haum rau ua lub koob yees duab, koob yees duab, tsom iav lo ntsiab muag, thiab prisms rau advanced optical instruments. Nws kuj yog siv nyob rau hauv kev tsim cov ceramic capacitors, piezoelectric ceramic dopants, thiab X-ray luminescent cov ntaub ntawv xws lilanthanum bromidehmoov. Extracted los ntawm lanthanum phosphate cerium ore los yog tau los ntawm hlawv lanthanum carbonate los yog nitrate. Nws tuaj yeem tau txais los ntawm cua sov thiab decomposing oxalate ntawm lanthanum. Siv los ua catalyst rau ntau yam tshuaj tiv thaiv, xws li catalytic oxidation ntawm carbon monoxide thaum doped nrog cadmium oxide, thiab catalytic hydrogenation ntawm carbon monoxide rau methane thaum doped nrog palladium. Lanthanum oxide infiltrated nrog lithium oxide lossis zirconia (1%) tuaj yeem siv los tsim cov hlau nplaum ferrite. Nws yog ib qho zoo heev xaiv catalyst rau oxidative coupling ntawm methane los tsim ethane thiab ethylene. Siv los txhim kho qhov kub thiab txias ntawm cov khoom siv hluav taws xob ntawm barium titanate (BaTiO3) thiab strontium titanate (SrTiO3) ferroelectrics, ntxiv rau tsim cov khoom siv fiber ntau optic thiab tsom iav kho qhov muag.
Post lub sij hawm: Aug-08-2023