Conversion of Oak to Cellular Silicon Carbide Ceramic by Gas‐Phase Reaction with Silicon Monoxide
Conversion of Oak to Cellular Silicon Carbide Ceramic by Gas‐Phase Reaction with Silicon Monoxide
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DOI：
10.1111/j.1151-2916.2001.tb00822.x
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发表时间：
2004-12
影响因子：
3.9
通讯作者：
E. Vogli;J. Mukerji;C. Hoffman;R. Kladny;H. Sieber;P. Greil
中科院分区：
文献类型：
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作者：
E. Vogli;J. Mukerji;C. Hoffman;R. Kladny;H. Sieber;P. Greil
通过在800°C以上的惰性气氛中退火，橡木已被转化为多孔生物碳模板。随后在1550-1600°C下在大气压的流动氩气下用气态SiO渗透最终导致多孔的蜂窝状β-SiC陶瓷的形成。这种转化保留了橡木组织的生物形态细胞形态。当细胞壁中直径小于0.1 μm的孔消失时，SiC陶瓷中保留了两个不同的孔道最大值，代表管胞和大导管。根据不同种类木材的细胞形态，例如，通过改变支撑体厚度和孔径分布，气相转化为单相β-SiC可用于制备具有宽范围孔道直径的多孔陶瓷。
Oak has been converted to a porous biocarbon template by annealing in an inert atmosphere above 800°C. Subsequent infiltration with gaseous SiO at 1550–1600°C under flowing argon of atmospheric pressure finally resulted in the formation of a porous, cellular β-SiC ceramic. The conversion retains the biomorphic cellular morphology of oak tissue. While pores in the cell walls with a diameter less than ∼1 μm vanished, two distinct pore channel maxima representing tracheidal cells and large vessels remained in the SiC ceramic. Depending on the cellular morphology of different kinds of wood, e.g., strut thickness and pore size distribution, gas-phase conversion to single-phase β-SiC can be used to manufacture cellular ceramics with a wide range of pore channel diameters.