Locally available Clays of Bangladesh as a Replacement of imported Clays for Ceramic Industries 

Md. Masum Akanda1*, Avijit Mallik2, Asif Bin Karim3, Md. Mintu Ali1

1Department of Glass & Ceramics Engineering, RUET, Rajshahi-6204, Bangladesh

2Department of Mechanical Engineering, RUET, Rajshahi-6204, Bangladesh

3Department of Mechatronics Engineering, RUET, Rajshahi-6204, Bangladesh

DOI: 10.5185/amlett.2019.0022

Publication Date (Web): May 18, 2019

Corresponding author: E-mail: masumruetgce13@gmail.com 

Graphical Abstract

In Bangladesh, generally imported clays are used as the main ingredient in ceramicware industries. Though locally available clays can be refined and used instead of imported ones to minimize the high manufacturing cost. In this research, 3 locally available clays were investigated both mechanically and spectrally. The XRF analysis of local non-refined clays in contrast to imported clays has indicated the presence of excess SiO2 content (about 35%) in the form of free silica as well as TiO2 and iron oxide but the Al2O3 content are a presence in lower amount (around 8.7%). In the ceramic body, a high amount of silica content shows low plasticity which creates a crack and iron oxide could adversely affect the translucency of ceramic ware. After the refining process from those local clays, the amount of SiO2 content was reduced up to 40.2% along with 5.5% increment in Al2O3 content. From the mechanical analysis of those clays, hardness, impact and compressive strength show very good results compared with imported clays. Copyright © VBRI Press

Abstract

In Bangladesh, generally imported clays are used as the main ingredient in ceramicware industries. Though locally available clays can be refined and used instead of imported ones to minimize the high manufacturing cost. In this research, 3 locally available clays were investigated both mechanically and spectrally. The XRF analysis of local non-refined clays in contrast to imported clays has indicated the presence of excess SiO2 content (about 35%) in the form of free silica as well as TiO2 and iron oxide but the Al2O3 content are a presence in lower amount (around 8.7%). In the ceramic body, a high amount of silica content shows low plasticity which creates a crack and iron oxide could adversely affect the translucency of ceramic ware. After the refining process from those local clays, the amount of SiO2 content was reduced up to 40.2% along with 5.5% increment in Al2O3 content. From the mechanical analysis of those clays, hardness, impact and compressive strength show very good results compared with imported clays. © VBRI Press

Keywords

Clay Refining, Material Analysis, Ceramics, Bangladesh

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