The Influence of Al₂O₃ Content on ZrO₂-Al₂O₃ Nanocomposite Formation - The Comparison between Sol-Gel and Microwave Hydrothermal Methods

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• 作者：Iwona E. Malka^a ; ^{iwona@unipress.waw.pl" class="auth_mail" title="E-mail the corresponding author} ; Anna Danelska^a ; Giora Kimmel^b
• 关键词：Microwave hydrotermal synthesis ; Sol-gel method ; ZrO2-Al2O3 nanocomposites ; Nanomaterials ; Phase composition ; Thermal stability
• 刊名：Materials Today: Proceedings
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：3
• 期：8
• 页码：2713-2724
• 全文大小：3217 K

文摘

Compositions of ZrO₂-Al₂O₃ nanocomposites in the range 10 to 90% wt. of Al were obtained using microwave hydrothermal (MW) synthesis, and sol-gel (SG) method. The use of nanomaterial components as starting ingredients yielded a new nanocomposite material were t-ZrO₂ is stabilized by Al₂O₃ presence after annealing up to 1450°C. Characterization of nanopowders was conducted using X-Ray diffraction (XRD), differential scanning calorimetry and termogravimetry (DSC-TG) methods, specific surface area measurement by BET, density, Raman spectroscopy, and by scanning electron microscopy (SEM). The MW synthesis produces more consistent samples then SG method which yield in amorphous product. All powders after heating up to 1450°C showed fully crystalline phases where the amount of t-ZrO₂ increased with increasing percentage quantity of Al (isolation effect).