Çift Katkılama Yöntemi ile Tetragonal Faz Bizmut Oksit Bazlı Katı Elektrolitlerin Sentezi ve Kristal Yapı Analizi

Year 2026, Volume: 54 Issue: 2 , 99 - 108 , 31.03.2026

Pelin Sönmez , Serdar Yılmaz

https://doi.org/10.15671/hjbc.1745781

https://izlik.org/JA62NE24XD

Abstract

Bu çalışmada, Yb₂O₃ ve Er₂O₃, katı oksit yakıt hücresi (SOFC) uygulamaları için malzemenin yapısal ve elektriksel özellikleri üzerindeki etkilerini araştırmak amacıyla katı hal reaksiyon yöntemi kullanılarak Bi₂O₃'ye katkılanmıştır. Yapısal karakterizasyon X-ışını kırınımı (XRD) kullanılarak gerçekleştirilirken, elektriksel iletkenlik 300-810°C sıcaklık aralığında dört noktalı bir prob yöntemi ile ölçülmüştür. Katkı maddesi konsantrasyonunun faz stabilizasyonu, tane morfolojisi ve iyonik iletkenlik üzerindeki etkisi sistematik olarak incelenmiştir. Sonuçlar, β-fazı tetragonal Bi₂O₃'nin başarıyla stabilize edildiğini ve Yb-katkının özellikle yüksek sıcaklıklarda iyonik iletkenliği önemli ölçüde artırdığını ortaya koymuştur. SEM analizi, tane boyutunun ve gözenekliliğin iletkenlik davranışı üzerindeki rolünü daha da açıklığa kavuşturmuştur.

Keywords

Bizmut oksit , katı elektrolit , çift katkılama , iletkenlik , 4 nokta iletkenlik , tetragonal faz , KOYH

Synthesis and Crystal Structure Analysis of Tetragonal Phase Bismuth Oxide-Based Solid Electrolytes with Double Doping Method

https://izlik.org/JA62NE24XD

Abstract

In this study, Yb₂O₃ and Er₂O₃ were doped into Bi₂O₃ using the solid-state reaction method to investigate their effects on the structural and electrical properties of the material for solid oxide fuel cell (SOFC) applications. Structural characterization was conducted using X-ray diffraction (XRD), while electrical conductivity was measured via a four-point probe method across a temperature range of 300–810°C. The influence of dopant concentration on phase stabilization, grain morphology, and ionic conductivity was systematically studied. The results revealed that β-phase tetragonal Bi₂O₃ was successfully stabilized, and Yb-doping significantly enhanced ionic conductivity, particularly at elevated temperatures. SEM analysis further elucidated the role of grain size and porosity on the conductivity behavior.

Keywords

Bismuth oxide , solid electrolytes , double doping , four probe , tetragonal phase , SOFC

Ethical Statement

All experiments were conducted in the research laboratories of Mersin University. This study did not involve any human or animal subjects, and thus no ethical approval was required.

Supporting Institution

Mersin University

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