Spectroscopic studies of ${MnO_2}$ and ${SiO_2}$ containing soil-active phosphate glasses
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej i Ceramiki (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Journal of Applied Spectroscopy (15pkt w roku publikacji)
ISSN
0021-9037
EISSN
1573-8647
Wydawca
Springer
DOI
Rok publikacji
2017
Numer zeszytu
6
Strony od-do
951--958
Numer tomu
83
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.6
Autorzy
(liczba autorów: 2)
Pozostali autorzy
+ 1
Słowa kluczowe
EN
phosphate glasses
manganese ions
chemical activity
FT-IR and Raman spectroscopy
Streszczenia
Język
EN
Treść
FT-IR and Raman spectra were measured and structurally interpreted for glasses of the 41P(2)O(5)center dot 8SiO(2)center dot 6K(2)O center dot(26 - x) MgO center dot(19 - y)CaO center dot(x+y)MnO2 system where 0 ae<currency> x+y ae<currency> 40 mol.%, acting as slow-release fertilizers. It was shown that increasing the amount of MnO2 in the structure of the investigated glasses causes their gradual depolymerization, as is particularly apparent in the case of the phospho-oxygen subnetwork. Spectroscopic methods, on the other hand, showed no influence of manganese ions on the silicate subnetwork. Research on the chemical activity of the analyzed glasses conducted under conditions simulating a natural soil environment showed their low solubility with a simultaneous gradual increase in solubility occurring with an increasing number of manganese ions in the glass composition. It was found that this behavior resulted from the formation of less chemically stable bonds of the P-O-Mn2+ type, as compared with bonds of the P-O-Ca2+ and P-O-Mg2+ types. This is consistent with the depolymerizing influence of manganese ions on the analyzed vitreous structure as shown by the FT-IR and Raman spectroscopy and, thus, its weakening.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:104527
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