A porous cordierite was synthesized at 1350℃ using rice husk as silica source and pore forming agent,and La2O3 as fluxing agent.The crystal phases of the cordierite were analyzed by X-ray diffraction (XRD) and their microstructures were observed by scanning electronic microscopy (SEM).The flexural strength,porosity and thermal expansion coefficient of the porous cordierite samples were investigated in detail.Results showed that when 5 wt.% La2O3 was added,the flexural strength,porosity and thermal expansion coefficient of the porous cordierite (named L5) reached 11.38 MPa,45.02%,3.03×10-6 ℃-1,respectively.Compared with that of the cordierite without La2O3,the flexural strength of L5 increased about 9 MPa,the porosity exhibited a slightly increase and the thermal expansion coefficient had no significant change.It was significant that the cordierite formation temperature was greatly decreased with the addition of La2O3.
参考文献
| [1] | Isabel Santacruz;Rodrigo Moreno;Joao B. Rodrigues Neto .Preparation of Cordierite Materials with Tailored Porosity by Gelcasting with Polysaccharides[J].International journal of applied ceramic technology,2008(1):74-83. |
| [2] | Terada M;Kawamura K;Kagomiya L;Birsan M .Effect of Ni substitution on the microwave dielectric properties of cordierite[J].Journal of the European Ceramic Society,2007,27:3045. |
| [3] | Kobayashi Y;Sumi K;Kato E .Preparation of dense cordierite ceramics from magnesium compounds and kaolinite without additives[J].Ceramics International,2000,26:739. |
| [4] | Camerucci M A;Urretavizcaya G;Cavalieri A L .Sintering of cordierite based materials[J].Ceramics International,2003,29:159. |
| [5] | 张华,胡娟,周万城,罗发.堇青石质蜂窝陶瓷的制备[J].硅酸盐学报,2004(01):24-28. |
| [6] | 王耀明,薛友祥,李勇,孟宪谦,李杰,张联盟.高温烟气净化用多孔堇青石陶瓷支撑体材料的研制[J].硅酸盐学报,2005(10):1262-1265. |
| [7] | 谢志勇,梁辉,徐明霞,徐廷献.溶胶-凝胶法制备堇青石粉体的固相反应过程和烧结性的研究[J].无机材料学报,2004(04):779-783. |
| [8] | Mei S;Yang J;Ferreira J M F.Colloidal processing of cordierite-based glass-ceramics[J].Journal of Inorganic Materials,2001(03):1249. |
| [9] | 薛向欣,张淑会,段培宁.工业固体废弃物作为合成Si基陶瓷原料的开发与利用[J].硅酸盐通报,2005(02):72-75. |
| [10] | 王晓凤,史志铭.La3+掺杂对堇青石陶瓷的相组成和性能的影响[J].功能材料,2005(08):1254-1256. |
| [11] | 付鹏,徐志军,初瑞清,李伟,谢倩.稀土氧化物在陶瓷材料中应用的研究现状及发展前景[J].陶瓷,2008(12):7-10. |
| [12] | Yang N R;Yue W H.The Handbook of Inorganic Metalloid Materials Atlas[M].武汉:武汉工业大学出版社,2000:207. |
| [13] | Ghitulica C;Andronescu E;Nicola O;Dicea A .Preparation and characterization of cordierite powders[J].Journal of the European Ceramic Society,2007,27:711. |
| [14] | Giovanni Bruno;Sven Vogel .Calculation of the Average Coefficient of Thermal Expansion in Oriented Cordierite Polycrystals[J].Journal of the American Ceramic Society,2008(8):2646-2652. |
| [15] | 罗民,王政,王燕,梁军,房俊卓.ZSM-5分子筛膜/多孔SiSiC陶瓷复合孔结构微反应器的制备[J].无机材料学报,2009(02):330-334. |
| [16] | LU P W.The Scientific Fundamental of Inorganic Materials[M].武汉:武汉工业大学出版社,1996:292. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%