Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method
Ca3Co4O9 is a p-type semiconducting material that is well-known for its thermoelectric (TE), magnetic, electronic, and electro-optic properties. In this study, sol-gel autoignition was used to prepare Ca3Co4O9 at different calcination temperatures (773, 873, 973, and 1073 K) and time (4, 6, 8, 10, 1...
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my.utm.864982020-09-30T08:41:10Z http://eprints.utm.my/id/eprint/86498/ Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method Mohammed, M. A. Uday, M. B. Izman, S. TJ Mechanical engineering and machinery Ca3Co4O9 is a p-type semiconducting material that is well-known for its thermoelectric (TE), magnetic, electronic, and electro-optic properties. In this study, sol-gel autoignition was used to prepare Ca3Co4O9 at different calcination temperatures (773, 873, 973, and 1073 K) and time (4, 6, 8, 10, 12, and 14 h) using starch as a fuel. The phase and microstructure of the prepared Ca3Co4O9 powder were investigated. Thermogravimetry.differential thermal analysis (TGA) confirms that the final weight loss occurred at 1073 K to form Ca3Co4O9 stable powder. The variable-pressure scanning electron microscopy (VP-SEM) images show that the size of powder particles increases from 1.15 to 1.47 μm as calcination time increases from 4 to 12 h, and the size remains almost constant thereafter. A similar pattern is also observed on the increment of the crystallite size and percentage of crystallinity with X-ray diffraction (XRD) analysis. The highest crystallinity is found about 92.9% when the powder was calcinated at 1073 K for 12 and 14 h with 458 and 460 Å crystallite size, respectively. Energy dispersive X-ray spectroscopy (EDS) analysis demonstrates that the calcinated powder has a high intensity of Ca, Co, and O with uniform distribution. High-resolution transmission electron microscopy (HRTEM) images prove that there is no distinct lattice distortion defect on the crystal structure. Tsinghua University Press 2020-04 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/86498/1/SudinIzman2020_EffectsofCalcinationTemperatureandTime.pdf Mohammed, M. A. and Uday, M. B. and Izman, S. (2020) Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method. Journal of Advanced Ceramics, 9 (2). ISSN 2226-4108 https://dx.doi.org/10.1007/s40145-019-0356-y DOI:10.1007/s40145-019-0356-y |
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TJ Mechanical engineering and machinery Mohammed, M. A. Uday, M. B. Izman, S. Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method |
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Ca3Co4O9 is a p-type semiconducting material that is well-known for its thermoelectric (TE), magnetic, electronic, and electro-optic properties. In this study, sol-gel autoignition was used to prepare Ca3Co4O9 at different calcination temperatures (773, 873, 973, and 1073 K) and time (4, 6, 8, 10, 12, and 14 h) using starch as a fuel. The phase and microstructure of the prepared Ca3Co4O9 powder were investigated. Thermogravimetry.differential thermal analysis (TGA) confirms that the final weight loss occurred at 1073 K to form Ca3Co4O9 stable powder. The variable-pressure scanning electron microscopy (VP-SEM) images show that the size of powder particles increases from 1.15 to 1.47 μm as calcination time increases from 4 to 12 h, and the size remains almost constant thereafter. A similar pattern is also observed on the increment of the crystallite size and percentage of crystallinity with X-ray diffraction (XRD) analysis. The highest crystallinity is found about 92.9% when the powder was calcinated at 1073 K for 12 and 14 h with 458 and 460 Å crystallite size, respectively. Energy dispersive X-ray spectroscopy (EDS) analysis demonstrates that the calcinated powder has a high intensity of Ca, Co, and O with uniform distribution. High-resolution transmission electron microscopy (HRTEM) images prove that there is no distinct lattice distortion defect on the crystal structure. |
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Article |
author |
Mohammed, M. A. Uday, M. B. Izman, S. |
author_facet |
Mohammed, M. A. Uday, M. B. Izman, S. |
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Mohammed, M. A. |
title |
Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method |
title_short |
Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method |
title_full |
Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method |
title_fullStr |
Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method |
title_full_unstemmed |
Effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method |
title_sort |
effects of calcination temperature and time on the ca3co4o9 purity when synthesized using starch-assisted sol-gel combustion method |
publisher |
Tsinghua University Press |
publishDate |
2020 |
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http://eprints.utm.my/id/eprint/86498/1/SudinIzman2020_EffectsofCalcinationTemperatureandTime.pdf http://eprints.utm.my/id/eprint/86498/ https://dx.doi.org/10.1007/s40145-019-0356-y |
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