钴酸盐
钙钛矿(结构)
材料科学
镧
电介质
氧化镧
结构精修
氧化物
分析化学(期刊)
介电损耗
兴奋剂
矿物学
无机化学
晶体结构
结晶学
化学
冶金
光电子学
色谱法
作者
Norah Alhokbany,Sultanah Almotairi,Jahangeer Ahmed,Sameerah I. Al‐Saeedi,Tansir Ahamad,Saad M. Alshehri
标识
DOI:10.1016/j.jksus.2021.101419
摘要
Sr-doped lanthanum cobaltite (La1−xSrxCoO3) perovskite oxides with × = 0.0, 0.20, 0.50, 0.80 were prepared using the modified sol–gel method at 600 °C. The synthesized Sr-doped LaCoO3 perovskite oxides (x = 0.0 and 0.20) crystalize as rhombohedral structured materials, while La0.2Sr0.8CoO3 perovskite oxide (x = 0.80) crystalizes as primitive cubic structured material as also confirmed by Rietveld refinement using x-ray diffraction. Moreover, the synthesized materials were investigated in details using fourier-transform infrared spectroscopy, scanning electron microscopy, energy dispersive studies and x-ray photoelectron spectroscopy techniques. The electrical conductivity of the perovskite oxides was improved through the substitution of La by Sr. Frequency dependent dielectric properties (dielectric constant and dielectric loss) of La1−xSrxCoO3 perovskite oxides were also investigated in frequency range from 20 Hz to 3 MHz at room temperature. Dielectric constant and dielectric loss of La1−xSrxCoO3 perovskite oxides decrease at low frequency, while it was found to be constant at high frequency.
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