以冰晶和聚苯乙烯(PS)微球为模板,微米级SiC粉体为原料,通过双模板法制备了具有三级孔径分布的多孔SiC陶瓷.研究了SiC的固含量和PS微球的大小对多孔SiC陶瓷的微观形貌、孔隙率和压缩强度的影响.研究结果表明:分级孔结构的多孔SiC陶瓷具有冰模板升华后遗留下的对齐排列的大孔、分布于孔壁中的由PS微球热解留下的中孔和颗粒之间堆积形成的小孔.随着SiC固相含量的增加,大孔孔径和孔容降低,但压缩强度增加.当PS微球粒径约为0.90 μm时,中孔孔径分布在0.7~1.5 μm之间;当PS微球粒径约为2.51 μm时,孔径分布较宽,约为1~3 μm.
参考文献
[1] | Zhu XW.;Jiang DL.;Tan SH. .Preparation of silicon carbide reticulated porous ceramics[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):232-238. |
[2] | Peter Greil .Advanced engineering ceramics[J].Advanced Engineering Materials,2002(5):247-254. |
[3] | Yongsoon Shin;Jun Liu;Li-Qiong Wang;Zimin Nie;William D.Samuels;Glen E.Fryxell;Gregory J.Exarhos .Ordered Hierarchical Porous Materials: Towards Tunable Size- and Shape-Selective Microcavities in Nanoporous Channels[J].Angewandte Chemie International Edition,2000(15):2702-2707. |
[4] | Studart, AR;Gonzenbach, UT;Tervoort, E;Gauckler, LJ .Processing routes to macroporous ceramics: A review[J].Journal of the American Ceramic Society,2006(6):1771-1789. |
[5] | Jihong She;Jian-Feng Yang;Naoki Kondo;Tatsuki Ohji;Shuzo Kanzaki;Zhen-Yan Deng .High-strength porous silicon carbide ceramics by an oxidation-bonding technique[J].Journal of the American Ceramic Society,2002(11):2852-2854. |
[6] | 罗民,李燕,侯广亚.液相渗硅法制备多孔Si/SiC生物形态陶瓷[J].应用化学,2009(12):1399-1403. |
[7] | Zhang H;Cooper AI .Aligned porous structures by directional freezing[J].Advanced Materials,2007(11):1529-1533. |
[8] | Deville S;Saiz E;Tomsia AP .Ice-templated porous alumina structures[J].Acta materialia,2007(6):1965-1974. |
[9] | Byung-Ho Yoon;Chee-Sung Park;Hyoun-Ee Kim .In Situ Synthesis of Porous Silicon Carbide (SiC) Ceramics Decorated with SiC Nanowires[J].Journal of the American Ceramic Society,2007(12):3759-3766. |
[10] | Yoon BH;Lee EJ;Kim HE;Koh YH .Highly aligned porous silicon carbide ceramics by freezing Polycarbosilane/Camphene solution[J].Journal of the American Ceramic Society,2007(6):1753-1759. |
[11] | 张凯,傅强,江璐霞.分散聚合反应中影响聚苯乙烯微球粒径的因素[J].材料研究学报,2003(01):107-112. |
[12] | 徐照芸,罗民,王怀昌,梁斌,宋伟明.水基冷冻干燥工艺制备层状结构多孔SiC陶瓷[J].硅酸盐通报,2011(03):736-740. |
[13] | 于方丽,白宇,杜军,王欢锐,杨建锋.多孔氮化硅陶瓷的微观结构、力学性能和气体透气性的研究[J].人工晶体学报,2012(03):656-660. |
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