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Journal of Materials Science: Materials in Electronics
Erschienen in: Journal of Materials Science: Materials in Electronics 4/2019

23.01.2019

Synthesis and microstructures of La1−xCaxCrO3 perovskite powders for optical properties

verfasst von: Yimin Wan, Jian Yang, Haigang Hou, Shunjian Xu, Guiwu Liu, Shahid Hussain, Guanjun Qiao

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 4/2019

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Abstract

Calcium-doped lanthanum chromates La1−xCaxCrO3 (0 ≤ x ≤ 0.4) are successfully synthesized using sol–gel method. The La1−xCaxCrO3 powders were characterized using X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy and Ultraviolet–Visible spectroscopy. To determine appropriate calcination temperature, the thermal decomposition process of La0.8Ca0.2CrO3 precursor is investigated via thermogravimetric and differential scanning calorimetry, X-ray diffraction and Fourier Transform Infrared spectroscopy analyses. The highest crystallization in La0.8Ca0.2CrO3 can be obtained while calcining at 800 °C. The microstructural analyses demonstrate that the La1−xCaxCrO3 nanoperovskite powders with a diameter of ~ Ø20 nm are nearly spherical, whereas the grain sizes decrease with increasing the doping concentration of calcium. The substantial formation of Cr6+ ions after Ca-doping decrease the band gap energy of powders achieved during the formation of impurity energy level, which can contribute in potential optical applications.
Vorheriger Artikel Phase formation and electrocaloric effect in nonstoichiometric 0.94Bi0.5+xNa0.5TiO3-0.06BaTiO3 ceramics
Nächster Artikel Produce of carbon nanotube/ZnO nanowires hybrid photoelectrode for efficient dye-sensitized solar cells

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Metadaten
Titel
Synthesis and microstructures of La1−xCaxCrO3 perovskite powders for optical properties
verfasst von
Yimin Wan
Jian Yang
Haigang Hou
Shunjian Xu
Guiwu Liu
Shahid Hussain
Guanjun Qiao
Publikationsdatum
23.01.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 4/2019
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-018-00623-z

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