Development of Magnesia-Yttria nanocomposite powder by new non-alkoxide sol-gel method

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• 作者：S.H. Vaez^a ; R.Sh. Razavi^a ; ^{Shoja_r@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; M.R. Loghman-Estarki^a ; ^{loghman57@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; A. Alhaji^a ; S. Ghorbani^a ; Ajay.K. Mishra^b
• 关键词：Magnesia&ndash ; Yttria nanocomposite ; Non-alkoxide sol-gel method
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1217-1226
• 全文大小：3840 K

文摘

Magnesia–Yttria nanocomposite powder was synthesized by new non-alkoxide sol-gel method. In this method, Y(NO₃)₃·6H₂O, Mg(CH₃COO)₂·4H₂O, Ethylene diaminetetraacetic acid (EDTA), Ethylene glycol (EG) were used as Y³⁺, Mg²⁺, chelating agent and solvent source, respectively. The influences of pH value and calcination temperature on phase evolution of samples have been investigated. As-synthesized magnesia– yttria nanocomposite powders were characterized by X-ray diffraction (XRD), field-emission scanning electron microscope (FESEM), energy dispersion spectrum (EDS), inductively coupled plasma (ICP), thermal gravimetric-differential thermal analysis (TG/DTA), the Brunauer-Emmett-Teller (BET) method and Fourier transform infrared (FTIR) analysis. The as-synthesized magnesia–yttria nanocomposite powder was consolidated by the cold press technique and sintered at 1400 °C for 2 h. The FESEM micrographs of sintered Magnesia– Yttria composite showed a uniform distribution of MgO and Y₂O₃ phases.