Controllable synthesis of metastable tetragonal zirconia nanocrystals using citric acid assisted sol-gel method

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• 作者：Fatemeh Davar^a ; ^b ; ^{f.davar@gmail.com} ; Asadollah Hassankhani^b ; Mohammad Reza Loghman-Estarki^c ; ^{mr.loghman@ma.iut.ac.ir}
• 关键词：D. ZrO2 ; Ceramic ; Sol-gel method ; Photoluminescence
• 刊名：Ceramics International
• 出版年：2013
• 出版时间：April, 2013
• 年：2013
• 卷：39
• 期：3
• 页码：2933-2941
• 全文大小：1283 K

文摘

Metastable tetragonal ZrO₂ nanoparticles and nanosheets were synthesized with citric acid assisted sol-gel method. In this approach, zirconium acetylacetonato, Zr(acac)₂, citric acid (CA) and ethylene glycol (EG) were used as the source of Zr⁴⁺, the chelating, and solvent agent, respectively. The effects of heat treatment on zirconia phase evolution were investigated. We demonstrate that pure tetragonal nanocrystalline zirconia can be obtained with CA: EG mole ratio=5:1 and calcination temperature 490 ¡ãC. The microstructure of the products was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and Raman scattering. Finally, Photoluminescence (PL) of nanosheets and nanoparticles were also investigated.