Effect of Boron Doping on Phase Stability of SrAl2O4: Eu+2, Dy+3 Nanofibers

Year 2019, Issue: 16, 16 - 25, 31.08.2019

Atilla Evcin

https://doi.org/10.31590/ejosat.497884

Cited By: 1

Abstract

In
this study, three varied groups as pristine, europium and dysprosium doped SrAl2O4
and boron doped SrAl2O4:Eu2+, Dy3+ phosphorus materials were prepared. To see
the effect of boron additive on phase stability of nanofibers, different ratios
of boron were added. In the experimental studies, as process variables during
the electrospinning method; the effect of the applied voltage, the distance
between the syringe needle and collector plate were examined. The
characterization of phosphorescence samples was carried out with DSC/TG, XRD
and SEM. As a result of XRD analysis of the synthesized powders the structure
was observed to be in monoclinic SrAl2O4 form in the pristine and Eu-Dy doped
samples and turn into orthorhombic crystal-structured Sr4Al14O25 structure.
Through examining the SEM photos of nanofibers, its observed that boron
additive has a significant effect on nanofiber structure and with the increase
in the boron amount, much order and much small-diameter nanofibers occur.
Consequently, it is determined that boron additive has a significant effect on
thermal, mineralogical and morphological properties of SrAl2O4: Eu, Dy
structure.

Keywords

Luminescence, Nanofiber, Electrospinning, Sol-gel

Supporting Institution

Scientific Research Projects Coordination Unit of Afyon Kocatepe University

Project Number

13.MUH.02

Thanks

This study was financially supported by Scientific Research Projects Coordination Unit of Afyon Kocatepe University (No:13.MUH.02).

SrAl2O4: Eu+2, Dy+3 Nanoliflerin Faz Kararlılığı Üzerine Bor Katkısının Etkisi

Abstract

Bu çalışmada, katkısız, europyum ve disprosyum
katkılı SrAl₂O₄ ve bor katkılı SrAl₂O₄:
Eu²⁺, Dy³⁺ fosfor malzemeleri olmak üzere üç farklı grup
hazırlanmıştır. Bor katkısının nanoliflerin faz stabilitesi üzerindeki etkisini
görmek için farklı oranlarda bor eklenmiştir. Deneysel çalışmalarda
elektroeğirme yönteminde süreç değişkenleri olarak; uygulanan voltajın etkisi,
şırınga iğnesi ve toplayıcı plaka arasındaki mesafe incelenmiştir. Fosforesan
örneklerinin karakterizasyonu, DSC/TG, XRD ve SEM ile gerçekleştirilmiştir.
Sentezlenen tozların XRD analizi sonucunda, yapının katkısız ve Eu-Dy katkılı
numunede monoklinik SrAl₂O₄ formunda olduğu ve ortorombik
kristal yapılı Sr₄Al₁₄O₂₅ yapısına dönüştüğü
gözlemlenmiştir. Nanoliflerin SEM fotograflarını inceleyerek, bor katkısının
nanolif  yapı üzerinde önemli bir etkiye
sahip olduğunu ve bor miktarındaki artışı, daha düzenli ve daha küçük çaplı
nanoliflerin meydana geldiği gözlemlenmiştir. Sonuç olarak, bor katkısının SrAl₂O₄:
Eu, Dy yapısının termal, mineralojik ve morfolojik özellikleri üzerinde önemli
bir etkisi olduğu belirlenmiştir.

Keywords

Lüminesans, Nanolif, Elektroeğirme, Sol-jel

Project Number

13.MUH.02

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