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http://dx.doi.org/10.3740/MRSK.2003.13.4.219

Synthesis of ZrO2 Gel Dispersed with Au Fine Particles by Sol-Gel Method  

Mun, Chong-Soo (Division of Advanced Materials Engineering Kyungnam University)
Lee, Seung-Min (Division of Advanced Materials Engineering Kyungnam University)
Publication Information
Korean Journal of Materials Research / v.13, no.4, 2003 , pp. 219-223 More about this Journal
Abstract
Zirconia gels dispersed with fine Au particles have been prepared by the sol-gel method. Starting solution with (OC$Zr_4$$H_{ 9}$)$_4$, $C_4$ $H_{9}$ OH, $H_2$O,$ HNO_3$, $HAuC1_4$ was used to prepare gels in several molar ratio. After hydrolysis, viscosity of solutions as 4∼5 cP and gelling time of sols were spent about 9 days. As the heat-treatment temperature was increased,$ ZrO_2$ had the phase transition from tetragonal to monoclinic at $750^{\circ}C$. Heat-treatments of the gel have performed at 500, 700, 750, 800, 1000 and $1100^{\circ}C$ for 3 hrs, respectively. We have investigated TG-DTA, X-ray diffraction patterns, SEM and EDS. The size of Au fine particles dispersed in the heat-treatmented gel was about 0.15∼0.23 $\mu\textrm{m}$ and the shape was most sphericity.
Keywords
Sol-Gel; $ZrO_2$; Au Fine particle; Tetragonal;
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