Synthesis and Characterization of Cordierite from Talc, kaolin and silica for filter applications
The level of air pollution due to urban transport in most developing economies of the world is high and needs to be reduced. In this research, locally available raw materials namely kaolin, Talc and MgO have been used to synthesize cordierite which is one of the materials for the production of diesel particle filters used in automobiles. The samples were produced through the conventional ceramics processing method where the powders were mixed in their correct proportions, pressed and sintered at 1200oC for 2 hours. Characterization tools like X-ray diffraction, differential thermal analyzer, compression testing machine etc. were used to evaluate the properties of the ceramics. As the talc content increased from 0 – 10%, there was no significant change in the density values as it remains at approximately 2.5 g/cm3. A structure that is partially crystalline with some amorphous regions was observed in all the samples. The strength modulus of 9.89 MPa was obtained without talc while the thermal analysis shows that two endothermic peaks at 108.5oC and 429oC were observed for all samples corresponding to loss of absorbed water and kaolinite conversion to metakaolin respectively. The obtained properties from the produced samples show that filters for automobile applications can be produced from these locally available materials.
Ewais, E. M. M., Ahmed, Y. M. Z., and Ameen, A. M. M. (2009). Preparation of porous cordierite ceramics using a silica secondary resource (silica fumes) for dust filtration purposes. Journal of Ceramic Processing Research, 10(6), 721-728.
Gökçe, H., Öveçoğlu, M. L., Aslanoğlu, Z., and Özkal, B. (2004). Microstructural Characterization of Cordierite Ceramics Produced from Natural Raw Materials and Synthetic Powders. Key Engineering Materials, 264-268, 1035-1038.
G¨unay, E. (2011). Sintering behavior and properties of sepiolite-based cordierite compositions with added boron oxide. Turkish J. Eng. Env. Sci., 35, 83-92.
Korikovsky, S. P., Larikova, T. L., and Gerasimov, V. Y. (2009). Retrograde Andalusite and Staurolite Coronas around Spinel in Garnet-Cordierite-Sillimanite-Biotite Gneisses of the Dzirula Massif (Georgia). Doklady Akademii Nauk, 424(6), 810-813.
Mai, P. P. T., Tien, N. T., Minh, T. L., and Driessche, I. V. (2015). The Application of High Surface Area Cordierite Synthesized from Kaolin as a Substrate for Auto Exhaust Catalysts. J. Chin. Chem. Soc., 62, 536-546.
Ning, W., Tang, Z., Han, Z., Ding, S., Xu, C., and Zhang, P. (2018). Effects of NH4VO3 on Properties and Structures of Cordierite Ceramics. Journal of Ceramics Science and Technology, 9(1), 47-52.
Shyam, A., Bruno, G., Watkins, T. R., Pandey, A., Lara-Curzio, E., Parish, C. M., and Stafford, R. J. (2015). The effect of porosity and microcracking on the thermomechanical properties of cordierite. Journal of the European Ceramic Society, 35, 4557-4566.
Smart, R. M., and Glasser, F. P. (1981). The subsolidus phase equilibria and melting temperatures of MgO, Al2O3, SiO2 compositions. Ceramics International, 7(3), 90-97.
Valaskova, M. (2015). Clays, Clay Minerals and Coriderite Ceramics - A Review. Ceramics - Silikaty, 59(4), 331-340.
Wu, J., Lu, C., Xu, X., Zhang, Y., Wang, D., and Zhang, Z. (2018). Cordierite Ceramics prepared from poor Quality kaolin for Electric Heater Supports: Sintering Process, Phase Transformation, Microstructure Evolution and Properties. Journal of the Wuhan University of Technology-Mater. Sci. Ed., 33(3), 598-607
Zhu, P., Wang, L. Y., Hong, D., and Zhou, M. (2012). A study of Cordierite