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Journal of Mining and Metallurgy B: Metallurgy
2018, vol. 54, br. 3, str. 291-300
jezik rada: engleski
vrsta rada: izvorni naučni članak
objavljeno: 24/01/2019
doi: 10.2298/JMMB171002020A
Creative Commons License 4.0
Raspodela veličine čestica (PSD) kao kriterijum za poređenje praha srebra dobijenog različitim metodama sinteze i uslovima elektrolize
aInstitut za rudarstvo i metalurgiju, Bor
bUniverzitet u Beogradu, Institut za hemiju, tehnologiju i metalurgiju - IHTM
cUniverzitet u Beogradu, Centar za multidisciplinarne studije

e-adresa: nnikolic@ihtm.bg.ac.rs

Projekat

Elektrohemijska sinteza i karakterizacija nanostrukturiranih funkcionalnih materijala za primenu u novim tehnologijama (MPNTR - 172046)

Sažetak

Prahovi srebra dobijeni elektrohemijskim (galvanostatskim (DC) i potenciostatskim (POT) režimima elektrolize) i hemijskim procesima su ispitani skenirajućim elektronskim mikroskopom (SEM) i urađena je raspodela veličine čestica (PSD). U DC režimu, primenjene su gustine struje od -14.4 mA cm-2 za nitratni (NIT; prah označen sa DC(NIT)) i -13.05 mA cm-2 za amonijačni (AM; DC(AM)) elektrolit. U POT režimu, korišćene su prenapetosti od -90 mV (NIT(90)) i -150 mV (NIT(150)) za nitratni, i -625 mV (AM(625)) and -925 mV (AM(925)) za amonijačni elektrolit. Redukcija sa hidrazinom je korišćena za hemijsku sintezu (prah označem sa HYD). Na osnovu SEM i PSD analiza, prahovi srebra su svrstani u tri grupe. U prvoj grupi se nalaze DC(AM), AM(925) i HYD prahovi sa (8.4-8.9 %) zapreminskim udelima. U drugoj grupi se nalaze AM(625) i DC(NIT) prahovi sa (6.5-6.6 %) zapreminskim udelima. NIT(90) i NIT(150) prahovi sa zapreminskim udelima (5.2-5.7 %) čine treću grupu. Dobijeni zapreminski udeli su korelisani sa morfologijom sintetizovanih čestica da bi se sagledale prednosti i nedostaci proizvodnje praha elektrohemijskim i hemijskim putem.

Ključne reči

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