CHACTERIZATION OF AJEBO CLAY IN SOUTH WEST NIGERIA
Keywords:
Ajebo clay, characterization, chemical composition, X-ray diffractometre, kaolin.
Abstract
Ajebo clay deposit in Abeokuta, South West, Nigeria was characterized to establish its use industrially. The major properties investigated were drying and firing behaviour, apparent porosity, bulk density, water absorption capacity,, chemical compositions and X-ray diffraction. The qualitative analysis by inductively coupled plasma showed the mineral to be composed mainly of Aluminium, Oxygen and Silica, with low content of iron. The clay has modulus of rupture (strength) ranging from 15.04-35.62kgF/cm2 and the colour ranged from white brown to light red on firing. The properties signify that Ajebo clay is stoneware clay. It can be used for the production of stoneware, flowerpot, tiles and brick making.
References
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Souza, G.P. 2004. Microstructural variations in Porcelain Stoneware as a function of flux system. J. Am. Ceram. Soc., 87(10): 1959-1966.
Viswabaskaran, V., Guanam, F.D. Balasubramaniam, M. 2004. Mullitisation behaviour of calcined clay-Alumina mixtures. Ceram. Int., 29: 561-571.
Yung-Feng, Chen., Wang, M.C., Hon. M.H. 2004a. Phase Transformation and Growth of Mullite in Kaolin. Ceram. J. Eur. Soc., 24: 2389-2397.
Yung-Feng Chen., Chang, Y.H., Wang, M.C 2004b. Effects of Al2O3 addition on the phases, flow characteristics and morphology of the porous kaolin ceramics. Mater. Sci. eng., A373: 221-228.
Ahmed, K.S., Onaji, P.B. 1986. The Effects of Beneficiation on the Properties of Some Nigerian Clay. Nigerian Society on Chemical Engineering, 6(2): 119-129.
Castelein, O., Soulestin, B., Bonnet, J.P. Blanchart, P. 2001. The influence of heating rate on the thermal behaviour and mullite formation from kaolin raw material. Ceram. Int., 27: 517-522.
Chen, C.J., Lan, G.S., Tuan, W.H. 2000. Microstructural Evolution of Mullite during sintering of kaolinite powder compacts. Ceram. Int., 26: 715-720.
Liu, K.C. Thomas, G. 1994. Time-Temperature Transformation Curves for Kaolinite Alumina. J. Am. Ceram. Soc.,
77: 545-552.
Mc Graw-Hill Encyclopaedia of Science and Technology. 1992. Mc Graw Hill Book Company. 8th Edition, 3: 752-761.
NEEDS Document. 2004. Published by National Planning Commission, Abuja. ISBN 0-9741/04-81.
Nnuka E.E., Enejo, C. 2001. Characterization Nahuta Clay for Industrial and Commercial Applications. Nigerian Journal of Engineering and Materials, 2(3):,9-12.
Rhodes, D. 1973. Clay and Glazes for the porter, Revised Edition. Chilton Book Company, Rednor, Pennsylvania, A&C London. Pp.6-23.
Sainz, M.A., Serrano, F.J. Bastida, J., Caballero, A. 1997. Microstructural Evolution and Growth of Crystallite size of mullite during thermal transformation of kyanite. J. Eur. Ceram. Soc., 17: 1277-1284.
Schneider, H., Okada, K., Pask, J. 1994. Mullite and Mullite Ceramics. John Wiley and Sons, New York.
Singer, F., Singer, S.S. 1971. Industrial Ceramics. Chapman and Hall Limited, London. Pp. 20-51.
Souza, G.P. 2004. Microstructural variations in Porcelain Stoneware as a function of flux system. J. Am. Ceram. Soc., 87(10): 1959-1966.
Viswabaskaran, V., Guanam, F.D. Balasubramaniam, M. 2004. Mullitisation behaviour of calcined clay-Alumina mixtures. Ceram. Int., 29: 561-571.
Yung-Feng, Chen., Wang, M.C., Hon. M.H. 2004a. Phase Transformation and Growth of Mullite in Kaolin. Ceram. J. Eur. Soc., 24: 2389-2397.
Yung-Feng Chen., Chang, Y.H., Wang, M.C 2004b. Effects of Al2O3 addition on the phases, flow characteristics and morphology of the porous kaolin ceramics. Mater. Sci. eng., A373: 221-228.
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