Magical Rare Earth Compound: Lanthanum Oxide

Lanthanum oxide,mawonekedwe a molekyuluLa2O3, kulemera kwa maselo 325.8091. Amagwiritsidwa ntchito kwambiri popanga magalasi owoneka bwino komanso ulusi wowoneka bwino.

Chemical katundu

Amasungunuka pang'ono m'madzi ndipo amasungunuka mosavuta mu ma asidi kupanga mchere wolingana.

Kuwonetsedwa mumlengalenga, ndikosavuta kuyamwa mpweya woipa ndi madzi, pang'onopang'ono kusandulika kukhala lanthanum carbonate.

Kuyakalanthanum oxidekuphatikiza ndi madzi kutulutsa kutentha kwakukulu.

katundu wakuthupi

Maonekedwe ndi katundu: White olimba ufa.

Kachulukidwe: 6.51 g/mL pa 25 ° C

Malo osungunuka: 2315 ° C, malo otentha: 4200 ° C

Kusungunuka: Kusungunuka mu ma acid ndi ammonium chloride, osasungunuka m'madzi ndi ma ketoni.

Njira yopangira

1. Zopangira zopangira njira yochotsera ndi njira yosowa ya nitrate padziko lapansi pambuyo pochotsa cerium, yomwe ili ndi pafupifupi 50% La2O3, kufufuza kuchuluka kwa CeO2, 116-7% Pr6O5, ndi 30% Nd2O3. Kuphatikizidwa mu Σ Njira yosowa ya nitrate yapadziko lapansi yokhala ndi 320-330g/L ya RxOy idachotsedwa ndikulekanitsidwa ndi zosowa zapadziko lapansi pogwiritsa ntchito kachipangizo kakang'ono ka phosphine, dimethyl heptyl methylphosphonate (P350), mu pulogalamu ya palafini ya P350 kwa magawo 35-38. za m'zigawo. Njira yotsalira yomwe ili ndi lanthanum inasinthidwa ndi ammonia, yopangidwa ndi oxalic acid, ndiyeno imasefedwa ndikuwotchedwa kuti ipeze mankhwala omaliza a lanthanum oxide. Kutengedwa kuchokera ku miyala ya lanthanum phosphate cerium ore kapena kukonzedwa ndi kuwotcha lanthanum carbonate kapena nitrate. Itha kupezekanso potenthetsa ndi kuwola oxalate wa lanthanum.

2. Ikani La (OH) 3 mu platinamu crucible, youma pa 200 ℃, kutentha pa 500 ℃, ndi kuwola pa 840 ℃ kuti mupeze lanthanum oxide.

Kugwiritsa ntchito

Amagwiritsidwa ntchito kwambiri popanga magalasi owoneka bwino komanso ulusi wowoneka bwino. Amagwiritsidwanso ntchito pamakampani amagetsi ngati ma capacitors a ceramic ndi zowonjezera za ceramic za piezoelectric. Amagwiritsidwanso ntchito ngati zopangira zopangira lanthanum borate komanso ngati chothandizira kulekanitsa ndi kuyeretsa mafuta.

Malo ogwiritsira ntchito: Amagwiritsidwa ntchito kwambiri popanga magalasi apadera a alloy precision optical, high refractive optical fiber board, oyenera kupanga makamera, makamera, magalasi a maikulosikopu, ndi ma prisms a zida zapamwamba zowunikira. Amagwiritsidwanso ntchito popanga ma capacitor a ceramic, piezoelectric ceramic dopants, ndi zida za X-ray luminescent monga.lanthanum bromideufa. Kutengedwa kuchokera ku miyala ya lanthanum phosphate cerium ore kapena kupezedwa powotcha lanthanum carbonate kapena nitrate. Itha kupezekanso potenthetsa ndi kuwola oxalate wa lanthanum. Amagwiritsidwa ntchito ngati chothandizira pazochitika zosiyanasiyana, monga kutulutsa mpweya wa carbon monoxide atayikidwa ndi cadmium okusayidi, komanso chothandizira hydrogenation wa carbon monoxide kupita ku methane atadzazidwa ndi palladium. Lanthanum oxide wolowetsedwa ndi lithiamu okusayidi kapena zirconia (1%) angagwiritsidwe ntchito kupanga maginito ferrite. Ndiwothandiza kwambiri posankha chothandizira cholumikizira oxidative cha methane kuti apange ethane ndi ethylene. Amagwiritsidwa ntchito popititsa patsogolo kutentha kudalira ndi dielectric katundu wa barium titanate (BaTiO3) ndi strontium titanate (SrTiO3) ferroelectrics, komanso kupanga CHIKWANGWANI chamawonedwe zipangizo ndi kuwala magalasi.