ILanthanum oxide,ifomula yemolekyuliLa2O3, ubunzima bemolekyuli 325.8091.Isetyenziselwa ikakhulu ukwenza iglasi ecacileyo yeglasi kunye neefiber zamehlo.
Ipropati yeMichiza
Inyibilika kancinci emanzini kwaye inyibilika ngokulula kwiiasidi ukwenza iityuwa ezihambelanayo.
Ivezwe emoyeni, kulula ukufunxa i-carbon dioxide kunye namanzi, ngokuthe ngcembe ijika ibe yi-lanthanum carbonate.
Ukutshai-lanthanum oxideidibanisa namanzi ukukhulula ubushushu obukhulu.
impahla ebonakalayo
Imbonakalo kunye neempawu: Umgubo omhlophe oqinileyo.
Ubuninzi: 6.51 g/mL ku-25 ° C
Indawo yokunyibilika: 2315 ° C, iqondo lokubila: 4200 ° C
Ukunyibilika: Inyibilika kwiiasidi kunye ne-ammonium chloride, enganyibilikiyo emanzini nakwii-ketones.
Indlela yokuvelisa
1. Izinto eziluhlaza zendlela yokukhutshwa yisisombululo esinqabileyo se-nitrate yomhlaba emva kokususwa kwe-cerium, equkethe malunga ne-50% ye-La2O3, i-trace amount of CeO2, 116-7% Pr6O5, kunye ne-30% Nd2O3.Idityaniswe kwi-Σ Isisombululo se-nitrate yomhlaba esinqabileyo esine-concentration ye-320-330g / L ye-RxOy yakhutshwa kwaye yahlulwa kwamanye amazwe anqabileyo ngokusebenzisa i-neutral phosphine extractant, i-dimethyl heptyl methylphosphonate (P350), kwi-P350 inkqubo ye-kerosene kwizigaba ze-35-38. yokutsalwa.Isisombululo esishiyekileyo esiqulethe i-lanthanum sasingathathi hlangothi nge-ammonia, ihlanjululwe nge-oxalic acid, kwaye emva koko ihlulwe kwaye itshiswe ukuze ifumane imveliso egqityiweyo ye-lanthanum oxide.Ikhutshwe kwi-lanthanum phosphate cerium ore okanye ilungiswe ngokutshisa i-lanthanum carbonate okanye i-nitrate.Inokufumaneka ngokufudumeza kunye nokubola kwe-oxalate ye-lanthanum.
2. Beka i-La (OH) i-3 kwi-platinum crucible, yome kwi-200 ℃, itshise kwi-500 ℃, kwaye ibole ngaphezu kwe-840 ℃ ukufumana i-lanthanum oxide.
Isicelo
Isetyenziselwa ikakhulu ukwenza iglasi ecacileyo yeglasi kunye neefiber zamehlo.Ikwasetyenziswa kushishino lwe-elektroniki njenge-ceramic capacitors kunye ne-piezoelectric ceramic additives.Ikwasetyenziswa njengento ekrwada yokuveliswa kwe-lanthanum borate kwaye njenge-catalyst yokwahlula i-petroleum kunye nokucocwa.
Intsimi yesicelo: Isetyenziselwa ukuvelisa i-alloy ekhethekileyo echanekileyo yeglasi ebonakalayo, ibhodi ye-fiber optical high refractive, ilungele ukwenza iikhamera, iikhamera, iilensi ze-microscope, kunye neeprism zezixhobo eziphezulu zamehlo.Ikwasetyenziswa ekwenzeni i-ceramic capacitors, i-piezoelectric ceramic dopants, kunye ne-X-ray luminescent materials ezifanalanthanum bromideumgubo.Itsalwe kwi-lanthanum phosphate cerium ore okanye ifunyenwe ngokutshisa i-lanthanum carbonate okanye i-nitrate.Inokufumaneka ngokufudumeza kunye nokubola kwe-oxalate ye-lanthanum.Isetyenziswa njenge-catalyst yeempendulo ezahlukeneyo, ezifana ne-catalytic oxidation ye-carbon monoxide xa ifakwe nge-cadmium oxide, kunye ne-catalytic hydrogenation ye-carbon monoxide kwi-methane xa ifakwe kwi-palladium.I-Lanthanum oxide efakwe nge-lithium oxide okanye i-zirconia (1%) ingasetyenziselwa ukwenza iimagnethi ze-ferrite.Yinto esebenza kakhulu ekhethiweyo yokudityaniswa kwe-oxidative ye-methane ukuvelisa i-ethane kunye ne-ethylene.Isetyenziselwa ukuphucula ukuxhomekeka kobushushu kunye neempawu ze-dielectric ze-barium titanate (BaTiO3) kunye ne-strontium titanate (SrTiO3) i-ferroelectrics, kunye nokwenza izixhobo ze-fiber optic kunye neeglasi zamehlo.
Ixesha lokuposa: Aug-08-2023