اثر پارامترهای فرآیند بر فاز و ریزساختار مخلوط اکسید فلزی Cu-Mn-O تهیه‌شده از طریق روش سنتز احتراقی در محلول

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی مواد و متالورژی، دانشکده فنی‌و‌مهندسی، دانشگاه فردوسی مشهد، مشهد.

چکیده

نانوذرات مخلوط اکسید فلزی Cu-Mn، از طریق روش احتراقی در محلول با استفاده از سوخت گلایسین سنتز شد. نسبت‌های مختلف سوخت به اکسیدکننده و درصدهای مولی متفاوت کاتیون‌های مس و منگنز به عنوان متغیرهای این سیستم در نظر گرفته ‌شده است. سپس، تأثیر تغییرات یادشده، بر تشکیل فازهای نهایی و تغییرات اندازه کریستالیت ذرات مورد ارزیابی قرار گرفت. ویژگی‌های فیزیکی و شیمیایی محصولات نهایی با استفاده از دو روش تجزیه و تحلیل پراش اشعه ایکس (XRD) و تصاویر میکروسکوپ الکترونی روبشی با دقت تجزیه و تحلیل شد. نتایج به دست آمده از آنالیزهای XRD و FE-SEM، تأثیر همزمان تغییرات نسبت سوخت به اکسیدکننده و درصد مولی کاتیون‌های فلزی را بر تبلور فازها‌ی نهایی، مورفولوژی ذرات تشکیل‌دهنده و اندازه کریستالیت ذرات نشان می‌دهند. استفاده از سوخت گلایسین منجر به سنتز محلول‌های جامد CuMn2O4 و CuMnO2 بدون نیاز به کوره و تجهیزات گران‌قیمت گردید. با افزایش درصد مولی Mn در نسبت سوخت به اکسیدکننده 1 افزایش تخلخل، در اثر آزادسازی حجم بیشتر گاز اتفاق افتاد؛ علاوه‌بر این، محاسبات تئوری، کمترین اندازه کریستالیت را در نسبت سوخت به اکسید کننده 1 نشان داد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The Effect of Process Parameters on the Phase and Microstructure of Cu-Mn-O Mixed Metal Oxide Synthesized via Solution Combustion Synthesis

نویسندگان [English]

  • laya agah
  • sahar mollazadeh
  • Ghasem Barati Darband
  • jalil vahdati
Department of Metallurgy and Materials Engineering, ferdowsi University of mashhad, mashhad, khorasa razavi, iran
چکیده [English]

Cu-Mn mixed metal oxide nanoparticles were synthesized using the solution combustion method with using glycine as the fuel. Various ratios of fuel to oxidizer and different molar percentages of Cu and Mn cations were considered as variables in this system for investigation. Then, the effect of the aforementioned changes on the crystallization of the phases of the final product and the change in the crystallite size of the particles were evaluated. In the next step, the physical and chemical characteristics of the final products were carefully evaluated using using both X-ray diffraction (XRD) and scanning electron microscope (SEM). The results obtained from XRD and FE-SEM analyses, the simultaneous effect of changes in the ratio of fuel to oxidizer and the molar percentage of metal cations on the composition of phases, the morphology of the constituent particles, and the crystallite size of the particles were investigated. Also, the use of glycine fuel led to the synthesis of solid solutions of CuMn2O4 and CuMnO2 without needing furnaces or expensive equipment. By increasing the molar percentage of Mn in the fuel-to-oxidizer ratio (1), the porosity and pore size increased. Furthermore, calculations confirmed the smallest crystallite size at this fuel-to-oxidizer ratio.

کلیدواژه‌ها [English]

  • Solution combustion synthesis
  • Mixed metal oxide
  • Cu-Mn-O system
  • Effect ratios of fuel to oxidizer

مراجع

 
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