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| Preparation and formation mechanism of porous ultralightweight zirconia by ice templating |
| CAO Yang; HE Junhui |
| Functional Nanomaterials Laboratory; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences (CAS); Beijing 100190) |
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Cite this article:
CAO Yang; HE Junhui. Preparation and formation mechanism of porous ultralightweight zirconia by ice templating. Chin J Mater Res, 2009, 23(5): 518-523.
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Abstract Porous lightweight ZrO2 and porous ultralightweight ZrO2 monolith were prepared via a freeze-drying process using ice as template. The microstructures, formation mechanisms and performances of thermal insulation and fire-resistant were studied. The results indicated that ice is an ideal template for fabrication of porous materials. The obtained porous ZrO2 with periodical layered microstructures were
lightweight, but with poor strength. After adding sodium silicate as binder, the obtained ZrO2 monolith has porous and layered hybrid microstructures, which were still kept after calcination at 400 oC for 6 h. The calcined ZrO2 monolith has a porosity of 87%, an apparent density of 0.50 g·cm−3 and high strength. The ZrO2 monolith showed good thermal insulating and fire-resistant properties with 1300oC butane gas flame.
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Received: 24 December 2008
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| Fund: Supported by the Hundred Talents Program of CAS, the National Basic Research Program of China No.2006CB933000, and the President Fund of CAS. |
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