Txoj kev npaj thiab qhia txog bismuth hmoov

Txoj kev npaj thiab qhia txog bismuth hmoov
Cov txheej txheem ntau lawm ntawm bismuth hmoov muaj xws li dej pos, txoj kev aerosol thiab pob milling txoj kev; Thaum atomizing thiab ziab hauv dej los ntawm txoj kev dej pos huab, bismuth oxidation yog yooj yim los ntawm thaj tsam loj ntawm bismuth hmoov; Ib yam li ntawd, nyob rau hauv qhov kub thiab txias, kev sib cuag ntawm bismuth nrog cov pa oxygen kuj yog ib qho yooj yim ua rau oxidation ntau; Ob txoj kev ua rau ntau yam impurities, cov duab tsis zoo ntawm bismuth hmoov thiab tsis sib xws particle tis. Lub pob milling txoj kev yog manually rauj lub bismuth ingot nrog stainless hlau kom tsawg dua los yog sib npaug rau 10 hli bismuth hais, los yog kom tua bismuth nrog dej. Tom qab ntawd cov bismuth hais nkag mus rau hauv lub tshuab nqus tsev thiab raug crushed los ntawm lub pob zeb lined nrog ceramic roj hmab. Txawm hais tias txoj kev no yog siv rau pob milling nyob rau hauv lub tshuab nqus tsev, nws muaj tsawg oxidation thiab tsis muaj impurities, tab sis nws yog lub sij hawm-siv, tsis tshua muaj yield, nqi siab, thiab particle loj mus txog 120 mesh, uas cuam tshuam rau cov khoom zoo. . Lub invention patent CN201010147094.7 muab cov txheej txheem ntau lawm ntawm ultra-fine bismuth hmoov, uas yog tsim los ntawm cov txheej txheem tshuaj ntub dej, muaj peev xwm ntau lawm, lub sij hawm luv luv nrog oxygen thaum lub sij hawm tag nrho cov txheej txheem ntau lawm, tsawg oxidation tus nqi, tsawg impurities, oxygen cov ntsiab lus ntawm bismuth hmoov 0 ＜ 0.6, thiab sib faib particle faib; Particle loj - 300 mesh.
1) Kev npaj cov tshuaj bismuth chloride: noj cov tshuaj bismuth chloride cov khoom lag luam nrog qhov ntom ntawm 1.35-1.4g / cm3, thiab ntxiv acidified dej ntshiab uas muaj 4 feem pua ​​- 6 feem pua ​​hydrochloric acid; Qhov ntim piv ntawm acidified dej ntshiab tov rau bismuth chloride Tshuag tov yog 1 ∶ 1-2;
2) Synthesis: ntxiv zinc ingot nrog huv si rau cov tshuaj bismuth chloride npaj; Pib qhov kev hloov pauv hloov; Saib xyuas qhov kawg taw tes. Thaum qhov kawg ntawm cov tshuaj tiv thaiv tau ncav cuag, tshem tawm cov zinc ingot uas tsis tau muab tshem tawm thiab ua kom dej nag rau 2-4 teev; Kev soj ntsuam thiab kev txiav txim hauv paus ntawm cov tshuaj tiv thaiv qhov kawg taw tes yog: muaj npuas hauv cov tshuaj koom nrog cov tshuaj tiv thaiv;
3) Kev sib cais ntawm bismuth hmoov: extract lub supernatant ntawm precipitate nyob rau hauv kauj ruam 2) kom rov qab zinc los ntawm cov pa txoj kev; Cov hmoov av precipitated bismuth yog nplawm thiab ntxuav rau 5-8 zaug nrog acidified dej ntshiab tov uas muaj 4 feem pua ​​- 6 feem pua ​​hydrochloric acid, thiab ces yaug nrog dej ntshiab kom txog thaum cov hmoov bismuth yog nruab nrab; Tom qab ziab cov hmoov bismuth sai sai nrog lub centrifuge, tam sim ntawd tsau cov bismuth hmoov nrog anhydrous ethanol, thiab ces qhuav nws;
4) Kev ziab: xa cov hmoov bismuth kho hauv kauj ruam 3) mus rau lub tshuab nqus tsev nrog qhov kub ntawm 60 ± 1 degree rau ziab kom tau txais - 300 mesh bismuth hmoov cov khoom tiav.
Cov hmoov bismuth uas tsim los ntawm cov txheej txheem saum toj no muaj qhov zoo ntawm qhov siab purity thiab nplua particle loj; Yog li ntawd, oxidation tus nqi yog tsawg.