Naslov
Insight into Crystallization of Iron Phosphate Glasses

Autori
Moguš-Milanković, Andrea ; Skoko, Željko ; Ličina, Vesna ; Musić, Svetozar ; Day, Delbert E. ; Reis, Signo T.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
ACerS 2008 Glass & Optical Materials Division Meeting ; Meeting Guide & Abstracts / Simmons-Potter, Kelly - Tucson (AZ) : The American Ceramic Society, 2008, 32-32

Skup
ACerS 2008 Glass & Optical Materials Division Meeting

Mjesto i datum
Tucson (AZ), Sjedinjene Američke Države, 18.05.2008. - 21.05.2008

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Crystallization; Iron Phosphate Glasses; Electrical Conductivity

Sažetak
Crystallization of 40Fe2O3-60P2O5 glass and its effects on electrical conductivity have been studied by XRD, DTA, SEM and IS. The conductivity was measured for as-quenched glass and after thermal treatment up to 800 °C. XRD has shown barely detectable beginning of crystallization at 490 °C. With increasing annealing temperature, these glasses turned into nanomaterials consisting of crystallites FePO4 embended in glassy matrix. Formation of nanocrystallites leads to an enhancement of glass matrix conductivity as compared with the as-quenched glass. Heat treatment at 650 °C causes massive crystallization. Formation of Fe3(P2O7)2 microcrystallites causes a drop of electrical conductivity due to the blocking of the conduction pathwas at crystal/glass matrix interfaces. Further thermal treatment at 724 and 804 °C leads ti predominant growth of Fe3(P2O7)2 crystals. Increase of electrical conductivity of this glass-ceramics is explained by strengthening of the inetraction between Fe sites in crystalline phases.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA