Preparation of nano-structured strontium carbonate from Dasht-e kavir celestite ore via mechanochemical method | ||
| Journal of Ultrafine Grained and Nanostructured Materials | ||
| مقاله 6، دوره 51، شماره 2، اسفند 2018، صفحه 147-152 اصل مقاله (696.26 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jufgnsm.2018.02.06 | ||
| نویسندگان | ||
| Erfan Alimohammadi؛ Saeed Sheibani* ؛ Abolghasem Ataie | ||
| School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran. | ||
| چکیده | ||
| Strontium carbonate (SrCO3) is one of the most important strontium compounds that have been used in a variety of technological and industrial applications. In the present investigation, nano-structured strontium carbonate was synthesized by mechano-chemical reaction of celestite ore (SrSO4) collected from Dasht-e kavir, Iran and sodium carbonate during high energy mechanical milling.The milling were performed for different durations of time up to 16 hours in a high-energy planetary ball mill with the rotational speed and ball to powder weight ratio of 300 rpm and 30, respectively. X-Ray diffraction (XRD), X-ray fluorescence spectrometer (XRF) and scanning electron microscope (SEM) were used to characterize the obtained samples. XRD results showed that at a Na2CO3:SrSO4 molar ratio of 1.05:1, mechano-chemical reaction started after 1 hour of milling. Although the longer milling times gives a more conversion of SrSO4 to SrCO3 but it has not been completed even after 16 hours of milling. However, by increasing the molar ratio of Na2CO3:SrSO4 to 1.25:1, the SrCO3 formation was completed after 2 hours. The results also showed that the mean crystallites sizes of produced nano-powder were approximately 32 nm. XRF result indicated that the final product was obtained with a purity of 95 wt.%. SEM studies confirmed the formation of SrCO3 nano-powder with a mean particle size of 80 nm. | ||
| کلیدواژهها | ||
| Strontium carbonate؛ Celestite ore؛ Nano-structured؛ Mechanochemical | ||
| مراجع | ||
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