Büyüklüğe Bağlı ZrO2 Nanoyapılarının Yapısal Parametrelerinin ve Optiksel Sabitlerinin Hesaplanması

Abstract

Bu çalışmada büyüklüğe bağlı zirkonyum dioksit (ZrO2) nanoyapılarının yapısal parametreleri ve optiksel sabitleri hesaplanmıştır. Parçacık boyutunun hesaplanan yapısal ve optiksel parametreler/sabitler üzerindeki etkisi araştırıldı. ZrO2 nanoyapıları kimyasal yolla üretildi. ZrO2 nanoyapılarının tane boyutunu değiştirmek için farklı tavlama sıcaklıkları (450-550 oC) uygulandı. Yapısal ve optiksel parametreleri/sabitleri hesaplamak için x-ışını kırınımı (XRD), taramalı elektron mikroskobu (SEM) ve ultraviyole/görünür bölge (UV-Vis) spektroskopisi ölçüm sonuçları kullanıldı. XRD ölçümü sonuçları, ZrO2 nanoyapılarının tetragonal (kübik) fazında kristalleştiğini gösterdi. SEM sonuçları, yoğun ve homojen yüzeyler ve artan tavlama sıcaklığıyla beraber yüzey tanelerinin büyüdüğünü sergiledi. ZrO2 nanoyapılarının bileşiksel oluşumu elektron dağılımlı x-ışını ve haritalama analizi ile kanıtlanmıştır. Optiksel ölçümler tane boyutuna (GS) bağlı olarak büyük ölçüde değişti.

Keywords

• ZrO2
• Optiksel sabit
• Yok olma katsayısı
• Kırılma indisi
• Reel dielektrik katsayısı

Calculation of Structural Parameters and Optical Constants of Size Dependent ZrO2 Nanostructures

Abstract

In this study, structural parameters and optical constants of size dependent zirconium dioxide (ZrO2) nanostructures were calculated. The effect of particle size was investigated on the calculated structural and optical parameters/constants. ZrO2 nanostructures were produced by chemical route. To change the grain size of the ZrO2 nanostructures, different annealing temperatures (450-550 oC) were applied. The x-ray diffraction (XRD), scanning electron microscope (SEM), and ultraviolet/visible region (UV-Vis) spectroscopy measurement results were used to calculate the structural and optical parameters/constants. The results of XRD measurement showed the ZrO2 nanostructures were crystallized in single tetragonal (cubic) ZrO2 phase. SEM results exhibited dense and homogeneous surfaces and enhanced surface grains with increased annealing temperature. The compositional formation of ZrO2 nanostructures were proved by electron dissipated x-ray and mapping analysis. Optical measuremets were strongly changed dependent on the grain size (GS).

Keywords

• ZrO2
• Optical constant
• Extinction coefficient
• Refractive index
• Reel dielectric constant

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