ILanthanum oxide,ifomula yemolekyuliLa2O3, ubunzima bemolekyuli 325.8091. Isetyenziselwa ikakhulu ukwenza iglasi ecacileyo yeglasi kunye neefiber zamehlo.
Ipropati yekhemikhali
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