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Electrical Transport in Iron Phosphate-Based Glass-(Ceramics): Insights into the Role of B2O3 and HfO2 from Model-Free Scaling Procedures        
Yazarlar
Arijeta Bafti
Türkiye
Shiro Kubiki
Türkiye
Doç. Dr. Hüseyin ERTAP Doç. Dr. Hüseyin ERTAP
Kafkas Üniversitesi, Türkiye
Mustafa Yüksek
İskenderun Teknik Üniversitesi, Türkiye
Mevlüt Karabulut
Gebze Teknik Üniversitesi, Türkiye
Andrea Mogus-Milankovic
Türkiye
Luka Pavic
Türkiye
Özet
In this work, we report the effect of the addition of modifiers and network formers on the polaronic transport in iron phosphate glasses (IPG) in two systems of HfO2–B2O3–Fe2O3–P2O5, to which up to 8 mol% boron and hafnium are added. The addition of oxides significantly changes the Fe2+ /Fetotal ratio, thus directly affecting the polaron number density and consequently controlling DC conductivity trends for both series studied by impedance spectroscopy. Moreover, we found that short-range polaron dynamics are also under the influence of structural changes. Therefore, we have studied them in detail using model-free scaling procedures, Summerfield and Sidebottom scaling. An attempt to construct a super-master curve revealed that in addition to change in polaron number density, also the polaron hopping lengths change, and Sidebottom scaling yields a super-master curve. The spatial extent of the localized motion of polarons is correlated with polaron number density and two distinct regions are observed. A strong increase in the spatial extent of the polaron hopping jump could be related either to the structural changes due to the addition of HfO2 and B2O3 and their effects on the formation of polarons or to an inherent property of polaron transport in IP glasses with low polaron number density.
Anahtar Kelimeler
iron phosphate glass | small polaron hopping | impedance spectroscopy | scaling procedures | model-free | conductivity and permittivity spectra
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı NANOMATERIALS
Dergi ISSN 2079-4991
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q1
Makale Dili İngilizce
Basım Tarihi 02-2022
Cilt No 12
Sayı 4
Sayfalar 639 / 0
Doi Numarası 10.3390/nano12040639
Makale Linki http://dx.doi.org/10.3390/nano12040639