Fabrication of porous SiC ceramics having pores shaped with Si grain templates
Fabrication of porous SiC ceramics having pores shaped with Si grain templates
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DOI：
10.1016/j.jeurceramsoc.2010.10.025
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发表时间：
2011-03
影响因子：
5.7
通讯作者：
H. Yamane;T. Shirai;H. Morito;Takahiro Yamada;Y. Hasegawa;T. Ikeda
中科院分区：
文献类型：
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作者：
H. Yamane;T. Shirai;H. Morito;Takahiro Yamada;Y. Hasegawa;T. Ikeda
以Si粉和炭黑为原料，在900°C的Na蒸汽中加热24 h制备了SiC多孔陶瓷。Si粉的颗粒不仅是SiC的Si源，而且还充当SiC多孔陶瓷中孔的模板。尺寸分别为≤10 μ m、≤50 μ m和≤150 μ m的角状Si晶粒形成了尺寸分别为2-10 μ m、10-150 μ m和50-150 μ m的角状气孔。SiC多孔陶瓷的孔隙率约为55- 59%。当使用球形Si颗粒时，也形成球形孔。用Si颗粒（≤50μm）制备的SiC多孔陶瓷的抗弯强度为14 MPa。
SiC porous ceramics were prepared by heating mixtures of Si powder and carbon black at 900°C for 24h in Na vapor. The grains of the Si powder were not only the source of Si for SiC but also served as templates for the pores in the SiC porous ceramics. Angular-shaped pores with sizes of 2–10, 10–150 and 50–150μm were formed by angular Si grains with sizes of ≤10, ≤50 and ≤150μm, respectively. The porosity of the SiC porous ceramics was around 55–59%. Spherical pores were also formed when spherical Si grains were used. A bending strength of 14MPa was measured for the SiC porous ceramics prepared with the Si grains (≤50μm).