UkulungiselelaUltrafine Rare Earth Oxides
Amakhompiyutha omhlaba we-Ultrafine angavamile anezinhlobo ezibanzi zokusetshenziswa ngokuqhathaniswa nemibukiso yemihlaba engavamile ngosayizi ojwayelekile wezinhlayiya, futhi kucwaningwa okwengeziwe kubo. Izindlela zokulungiselela zihlukaniswe zaba yindlela yesigaba esiqinile, indlela yesigaba se-liquid, kanye nendlela yesigaba segesi ngokuya ngesimo sokuqina sento. Njengamanje, indlela yesigaba se-liquid isetshenziswa kabanzi ezindaweni zokucwaninga kanye nasezimboni ukuze kulungiselele ama-powders e-ultrafine e-rare ndzakho. Ifaka phakathi indlela yezulu, indlela ye-sol gel, indlela ye-hydrothermal, indlela yethempulethi, indlela ye-microPlate kanye ne-Alkyd hydrolysis indlela efanelekile kakhulu ekukhiqizweni kwezimboni.
Indlela yokwetha imvula ukwengeza i-precipitant kwisixazululo sikasawoti sensimbi se-teapitation, bese uhlunga, ugeze, womile futhi ufudumele ukubola ukuze uthole imikhiqizo ye-powder. Kubandakanya indlela eqondile yezulu, indlela efanayo yethala kanye nendlela yokuqothuka kwe-coprecipity. Endleleni ejwayelekile yezulu, engavamile emhlabeni oxides kanye nosawoti womhlaba ongavamile uSawuti oqukethe imisebe eshintshashintshayo ye-acid ingatholwa ngokushisa i-precititate, ngosayizi we-3-5 μ m. Indawo ethile engaphezulu ingaphansi kwe-10 ㎡ / g futhi ayinazo izici ezikhethekile zomzimba nezamakhemikhali. Indlela ye-Ammonium Carbonate Teapitate nendlela ye-oxmic acid yemvelo njengamanje iyindlela esetshenziswa kakhulu yokukhiqiza ama-powders ajwayelekile we-oxide, futhi inqobo nje uma imibandela yenqubo yemvula iguqulwa, ingasetshenziswa ukulungiselela i-Ultrafine Rare Earth AIRRIDE powders.
Ucwaningo selukhombisile ukuthi izinto eziphambili ezithinta usayizi wezinhlayiyana kanye ne-morphology of rare emhlabeni Ultrafine Powders kwi-Amomonium Bicarbonate Wayders kwi-Amomonium Bicarbonate Wayders kwikhambi elingajwayelekile kwikhambi kuyisihluthulelo sokwenza ama-powders e-Ultrafine ahlakazeka ngokufanayo. Isibonelo, ekuhlolweni kwe-Y3 + Phezulu ukulungiselela i-Y2O3, lapho ukuqunjelwa kwesisindo komhlaba okungavamile kungu-20 ~ 30g / l (kubalwa yi-y2o3)
Ekuphendukeni kwamakhemikhali, izinga lokushisa liyisici esinqumayo. Kulezi zivivinyo ezingenhla, lapho izinga lokushisa lingu-60-70 ℃, imvula iyahamba kancane, ukufombula kuyashesha, izinhlayiya zikhululekile futhi ziyindilinga, futhi ziyindilinga; Lapho amazinga okushisa asabela engaphansi kwama-50 ℃, amafomu wezulu ngokushesha, ngokusanhlamvu okuningi kanye nosayizi omncane wezinhlayiyana. Ngesikhathi sokuphendula, inani le-CO2 ne-NH3 elichichima lincane, futhi imbewu isefomini elinamathelayo, elingakulungeli ukugcwala nokugeza. Ngemuva kokushiswa ku-ytttrium oxide, kusenezinto ezivinjelwe ezi-agglomerale sína futhi zinesayizi enkulu yezinhlayiya. Ukuhlushwa kwe-Ammonium Bicarbonate kuthinta nalolukhulu lwe-yttrium oxide. Lapho ukugcwaliseka kwe-ammonium bicarbonate kungaphansi kwe-1mol / l, i-ytttrium oxide usayizi omncane incane futhi iyunifomu; Lapho ukugcwala kwe-amonmonium bicarbonate kudlula i-1mol / l, ukuthathwa kwemvelo kwendawo kuzokwenzeka, kubangele ukuhlangana nezinhlayiya ezinkulu. Ngaphansi kwezimo ezifanele, usayizi wezinhlayiyana ezi-0.01-0.5 zingatholakala μ m ultrafine ytttrium oxide powder.
Ngendlela ye-oxalate yezulu, isixazululo se-oxalic acid sengezwa ngokudonsa ngenkathi i-ammonia ingezwa ukuqinisekisa inani eliqhubekayo le-PH ngesikhathi senqubo yokusabela, okuholela kusayizi we-μ m we-jttrium oxide powder. Okokuqala, i-Precipitate YTtrium Nitrate Solution enamanzi e-ammonia ukuthola i-ytttrium hydroxide colloolide colloid, bese uyiguqula ngesisombululo se-oxalic acid ukuthola usayizi wezinhlayiyana ngaphansi kwe-1 μ μ μo3 powder of m. Faka i-Edta kwikhambi le-y3 + ye-ytttrium nitrate nge-0.25-0.5mol / l, lungisa i-ph to 9 namaminithi we-ammonia / amaminithi angu-50 ℃ kuze kube yilapho imvula iphelele ku-pH = 2. I-YTtrium Oxide Powder enesayizi eyizinhlayiyana ka-40-100nm ingatholakala.
Ngesikhathi senqubo yokulungiselelaUltrafine Rare Earth OxidesNgendlela yemvula, amazinga ahlukene okuthi agglomeralion athambekele kuye. Ngakho-ke, ngesikhathi senqubo yokulungiselela, kuyadingeka ukuthi ulawule izimo zokuhlanganisa, ngokulungisa inani le-PH, usebenzisa ama-preciance ahlukene, engeza izindlela zokuhlubuka, nezinye izindlela zokusabalalisa ngokuphelele imikhiqizo ephakathi. Ngemuva kwalokho, kukhethwe izindlela ezifanele zokomisa, futhi ekugcineni, imigwaqo ehlakazekile ehlakazekile i-Ultrafine Powders itholakala nge-calvun.
Isikhathi sePosi: APR-21-2023