Solvothermal synthesis of size-controlled ZrO₂ microspheres via hydrolysis of alkoxides modified with acetylacetone

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• 作者：Hiroaki Uchiyama ; ^{h_uchi@kansai-u.ac.jp} ; Keiji Takagi ; Hiromitsu Kozuka
• 关键词：Spherical particles ; Hydrothermal process ; Zirconia
• 刊名：Colloids and Surfaces A ; Physicochemical and Engineering Aspects
• 出版年：2012
• 期刊代码：22_09277757
• 类别：ch
• 出版时间：5 June, 2012
• 卷：403
• 期：Complete
• 页码：121-128
• 文件大小：2270 K

摘要

We prepared ZrO₂ particles from the solutions containing Zr(OC₃H₇ⁿ)₄, H₂O, n-C₃H₇OH and acetylacetone (acac) via solvothermal treatment at 150 掳C. The particle size and shape depended on the molar composition of the precursor solutions. Micron-sized spheres consisting of cubic and tetragonal ZrO₂ with low crystallinity were obtained via hydrolysis of Zr(OC₃H₇ⁿ)₄ modified with acac, and the size of the spheres decreased from 2-10 渭m to 0.5 渭m with increasing amount of H₂O and n-C₃H₇OH at constant n-C₃H₇OH/H₂O mole ratios. The non-aggregated, homogeneous microspheres can be observed even by optical microscopy. The crystallinity of the ZrO₂ spheres were improved by the heat treatment at 600 掳C, and the spherical shape remained during the heat treatment.