Napredna pretraga

Pregled bibliografske jedinice broj: 326753

Structural properties of Cr2O3-Fe2O3-P2O5 glasses. Part I


Šantić, Ana; Moguš-Milanković, Andrea; Furić, Krešimir; Bermanec, Vladimir; Kim, C. W.; Day, Delbert E.
Structural properties of Cr2O3-Fe2O3-P2O5 glasses. Part I // Journal of Non-Crystalline Solids, 353 (2007), 11-12; 1070-1078 doi:10.1016/j.jnoncrysol.2006.12.104 (međunarodna recenzija, članak, znanstveni)


Naslov
Structural properties of Cr2O3-Fe2O3-P2O5 glasses. Part I

Autori
Šantić, Ana ; Moguš-Milanković, Andrea ; Furić, Krešimir ; Bermanec, Vladimir ; Kim, C. W. ; Day, Delbert E.

Izvornik
Journal of Non-Crystalline Solids (0022-3093) 353 (2007), 11-12; 1070-1078

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Raman scattering; Mossbauer effect; phosphates

Sažetak
The structural properties of xCr2O3-(40-x)Fe2O3-60P2O5, 0-x-10, (mol%) glasses have been investigated by Raman and Mössbauer spectroscopies, X-ray diffraction (XRD) and Differential Scanning Calorimetry (DSC). The Raman spectra show that the addition of up to 5.3 mol% Cr2O3 does not produce any changes in the glass structure, which consists predominantly of pyrophosphate, Q1, units. This is in accordance with O/P=3.5 for these glasses. The increase in glass density and Tg that occurs with increasing Cr2O3 suggests the strengthening of glass network. The Mössbauer spectra indicate that the Fe2+/Fetot ratio increases from 0.13 to 0.28 with increasing Cr2O3 content up to 5.3 mol%, which can be related to an increase in the melting temperature from 1423 to 1473 K. After annealing, the 10Cr2O3-30Fe2O3-60P2O5 (mol%) sample was partially crystallized and contained crystalline beta-CrPO4 and Fe3(P2O7)2. The SEM and AFM micrographs of the partially crystallized sample revealed randomly distributed crystals embedded in a homogeneous glass matrix. EDS analysis of the glass matrix indicated that it was rich in Fe2O3 (39.6 mol%) and P2O5 (54.9 mol%), but contained only 5.5 mol% of Cr2O3. These results indicate that the maximum solubility of chromium in these iron phosphate melts is 5.5 mol% Cr2O3.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2898 - Fizika i primjena nanostruktura i volumne tvari (Mile Ivanda, )
098-0982929-2916 - Utjecaj strukture na električna svojstva (bioaktivnih) stakala i keramike (Andrea Moguš-Milanković, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati