Ultra-high-porosity zirconia ceramics fabricated by novel room-temperature freeze-casting

Ultra-high-porosity zirconia ceramics fabricated by novel room-temperature freeze-casting
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新型室温冷冻铸造制备超高孔隙率氧化锆陶瓷

DOI:
10.1016/j.scriptamat.2008.12.011
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发表时间:
2009-04
期刊:
影响因子:
6
通讯作者:
Hong, Changqing
Hong, Changqing
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhang, Xinghong;Han, Jiecai;Du, Jiancong;Han, Wenbo;Hong, Changqing

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采用固含量为10 ~ 20 vol.%的氧化锆/α-烯烃浆料,然后在空气中冷冻干燥,随后在1500°C下热处理2小时。所有制备的样品都显示出高度多孔的微观结构,中等孔径范围为20 - 50μm。孔隙率在82%~ 67%之间变化,而抗压强度从41 MPa显著提高到63 MPa。
Ultra-high-porosity zirconia ceramics with interconnected pores were prepared by freezing zirconia/camphene slurries with solid loading ranging from 10 to 20vol.%, followed by freeze-drying in air and subsequent heat treatment at 1500°C for 2h. All of the fabricated samples showed highly porous microstructures with moderate pores ranging from 20 to 50μm in size. The porosity varied between 82% and 67%, while the compressive strength was significantly improved from 41 to 63MPa.
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