首页|Preparation and Characterization of Unique Foamy Zirconia Single Crystals via Sol-Gel-Hydrothermal Method

Preparation and Characterization of Unique Foamy Zirconia Single Crystals via Sol-Gel-Hydrothermal Method

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Porous ZrO_2 single crystals were prepared through a sol-gel-hydrothermal method and characterized by XRD, HR-TEM, SEM and FT-IR. The results show that the dried sol gel was converted into monoclinic zirconia crystals after calcined above 550℃. The zirconia single crystal has a porous structure with the crystal sizes of 20-70 nm. The origin of the pores was the gaseous hydrolysates of the superstoichiometric urotropine. The gel structure and the hydrothermal treatment are the required conditions resulting in the pores in crystals. After sintered at 1400℃, the disc of the obtained ZrO_2 crystals was dense. However, Y_2O_3 should be added to avoid fracture due to phase change if the disc was used as heat insulating layer.

ZrO_2 crystalporoussol-gel-hydrothermal

Chang Qibing、Zhou Jianer、Wang Yongqing、Meng Guangyao

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Jingdezhen Ceramic Institute, Jingdezhen 333001, P. R. China University of Science and Technology of China, Hefei 230026, P. R. China

Jingdezhen Ceramic Institute, Jingdezhen 333001, P. R. China

University of Science and Technology of China, Hefei 230026, P. R. China

2010

10.4028/www.scientific.net/KEM.434-435.451

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.434/435
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