Synthesis of zinc aluminate (ZnAl2O4) by mechanochemical processing with different molar ratios of ZnS:Al

Journal of Advanced Materials and Processing

مقاله 3، دوره 8، شماره 1، خرداد 2020، صفحه 20-29   

نوع مقاله: Research Paper

نویسندگان

Niloofar Ghani Kolahloo¹؛ Nader SETOUDEH^{* 2}؛ Abbas Mohassel³؛ Raziye Hayati¹؛ Mohammad Sajjadnejad⁴

¹Materials Engineering Department, School of Engineering, Yasouj University, Yasouj, 75918-74831, Iran

²Materials Engineering- School of Engineering-Yasouj University-Yasouj - Iran

³Materials Engineering Department, School of Engineering, Yasouj University, Yasouj, 75918-74831, Iran

⁴Materials Engineering Department, School of Engineering , Yasouj University, Yasouj, 75918-74831, Iran

چکیده

Zinc aluminate spinel structure (ZnAl2O4) was synthesized from mixtures of zinc sulfide (with sphalerite structure) and aluminum. The starting materials with different molar ratios were milled for 3 hours. The as-milled powders were heated isothermally at 800 ⁰C under an air atmosphere for one hour. The heated samples finally were washed out with diluted sulfuric acid and the remained residuals were dried at 110 ℃ for two hours. The results showed that aluminium content and the molar ratios of ZnS:Al in the starting materials have significant effect on the formation of ZnAl2O4.The as-milled results showed that although the reduction of ZnS by aluminum occurred during milling, the reaction was not completed with increasing the Al content in the starting materials. Except the molar ratio of 1:2, no signs of un-reacted Al were observed in other mixtures of ZnS-Al after milling for three hours. The XRD patterns and FT-IR spectra of the acid treated sample revealed that zinc aluminate could be synthesized from mixtures of ZnS-Al and the ZnS-Al mixture with molar ratio of 4:2 was the best among all mixtures.

کلیدواژه‌ها

Mechanochemical reaction؛ Sphalerite؛ Spinel؛ ZnAl2O4؛ Zinc sulfide