以高纯氧化铝为原料,通过起泡结合凝胶注模成型的方法制备了孔隙率为77%～85%、孔径为40～200μm的氧化铝多孔陶瓷.多孔陶瓷组成为α-Al2O3.多孔陶瓷的微结构可通过固含量与发泡剂加入量的改变进行调控.多孔陶瓷的耐压强度为9.40～32.50MPa,且对其断裂方式进行了研究.多孔陶瓷在1000℃下的热导率为0.80 W.（m.K）-1.
Porous alumina ceramics with 77% -85% porosity and pore size of 40- 200 μm were fabricated by foaming together with gelcasting. The composition of porous ceramics was α-A12O3, and the microstructures were tailored by modulating the solid content or the quantity of foaming agent added. The compressive strengths were 9.40 - 32.50 MPa, and the fracture mode was studied. The thermal conductivity of porous ceramics was0.80 W ·(m·K) -1 at 1 000 ℃.
参考文献
| [1] | P. Colombo;H. P. Degischer .Highly porous metals and ceramics[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2010(10):1145-1158. |
| [2] | Colombo, P.;Vakifahmetoglu, C.;Costacurta, S. .Fabrication of ceramic components with hierarchical porosity[J].Journal of Materials Science,2010(20):5425-5455. |
| [3] | Paolo Colombo .In Praise Of Pores[J].Science,2008(5900):381-383. |
| [4] | Santanu Dhara;Parag Bhargava .A Simple Direct Casting Route to Ceramic Foams[J].Journal of the American Ceramic Society,2003(10):1645-1650. |
| [5] | Xiaojian Mao;Shunzo Shimai;Shiwei Wang .Effects of Coarse Particles on the Gelcasting of Ceramic Foams[J].Journal of the American Ceramic Society,2008(7):2412-2414. |
| [6] | Santanu Dhara;Parag Bhargava .A Simple Direct Casting Route to Ceramic Foams[J].Journal of the American Ceramic Society,2003(10):1645-1650. |
| [7] | Brent S.Murray .Stabilization of bubbles and foams[J].Current opinion in colloid & interface science,2007(4/5):232-241. |
| [8] | Ryoji Takahashi;Satoshi Sato;Toshiaki Sodesawa;Takaya Goto;Katsuhiro Matsutani;Naoki Mikami .Bending strength of silica gel with bimodal pores: Effect of variation in mesopore structure[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2005(7):1148-1156. |
| [9] | P. Sepulveda;J.G.P. Binner .Processing of Cellular Ceramics by Foaming and in situ Polymerisation of Organic[J].Journal of the European Ceramic Society,1999(12):2059-2066. |
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