以硅藻土为主要原料,采用固相烧结法和低温煅烧工艺,制备了硅藻土基多孔陶瓷.着重考察了电气石对材料的微观结构、孔径分布等材料孔结构及孔雀石绿溶液脱色能力的影响,通过扫描电镜、压汞仪等手段对不同电气石含量的硅藻土基多孔陶瓷进行了表征.结果表明:当电气石含量为12%时,材料内孔径细小,平均孔径最小177.5 nm,比表面积最大6.83 m2/g;电气石含量由0提高到16%,材料的孔隙率由49.3%降至36.5%,对孔雀石绿溶液的脱色能力逐渐增强.当电气石含量为16%时,反应6 h后,412 nm与618 nm处吸收峰消失.
Using diatomite as the main material, the diatomite-based porous ceramics were prepared by solid-phase sintering and low-temperature calcination process. The influence of tourmaline content on materials' microstructure, pore size distribution and the decolorization ability for malachite green aqueous solution was priority studid by scanning electron microscopy, Hg porosimetry,and so on. The results indicate that sample with 12% tourmaline has average aperture smallest 177.5 nm and biggest specific surface area 6.83 m2/g; Tourmaline content is enhanced from 0 to 16%, the materials' porosity decrease from 49.3% to 36.5% and materials' decolorization ability to malachite green solution's strengthens gradually. When tourmaline content is 16%, malachite-green aqueous solution is completely decolored in 6 h and the absorption peaks at 412 nm, 618 nm disappears.
参考文献
| [1] | S. Grandjean;J. Absi;D.S. Smith .Numerical calculations of the thermal conductivity of porous ceramics based on micrographs[J].Journal of the European Ceramic Society,2006(13):2669-2676. |
| [2] | Dong YC;Liu XQ;Ma QL;Meng GY .Preparation of cordierite-based porous ceramic micro-filtration membranes using waste fly ash as the main raw materials[J].Journal of Membrane Science,2006(1/2):173-181. |
| [3] | 李青,钟顺和.硅藻土-莫来石复合陶瓷膜支承体的制备及表征[J].催化学报,1999(01):41-44. |
| [4] | P.V.Vasconcelos;J.A.Labrincha .Permeability of diatomite layers processed by different colloidal techniques[J].Journal of the European Ceramic Society,2000(2):201-207. |
| [5] | Kakamu y;Sano H .Tourmaline Composite Grains and Apparatus Using Them[P].US patent:6034013,2000-03-18. |
| [6] | Nakamura T;Kubo T .The Tourmaline Group Crystals Reaction with Water[J].Journal of Ferroelectrics,1992,137(01):13-31. |
| [7] | 冀志江,金宗哲,梁金生,王静,颜学武.极性晶体电气石颗粒的电极性观察[J].人工晶体学报,2002(05):503-508. |
| [8] | 董发勤,何登良,袁昌来.电气石的环境功能属性及应用[J].功能材料,2005(10):1485-1488. |
| [9] | Zhou J;Zhang X Z;Li J K et al.Study on the Cordieritr Honeycomb Ceramics Matrix with Gas Filtration[J].china ceramics,2006,42(01):3-7. |
| [10] | Wu Z D;Zhou Z F;Wang W J et al.Preparation of Micron Level Porous Al2O3 Ceramics[J].Jiangsu Ceramics,1999,15(03):23-26. |
| [11] | Meng J P;Liang J S;Ding Y .Effects of Mineral Tourmaline Particles on Photo-catalytic Activities of RE/TiO2 Compos Thin Films[J].Journal of Rare Earths,2004,22(z2):101-105. |
| [12] | 曹慧玲,张力,吕广镛.电气石吸附降解亚甲基蓝等有机染料的研究[J].广东化工,2007(01):30-34. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%