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Advanced Materials Letters

Volume 10, Issue 11, Pages 839-843, November 2019

About Cover

---

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

Adv. Mater. Lett., 2019, 10 (11), pp 839-843

DOI: 10.5185/amlett.2019.0022

Publication Date (Web): May 18, 2019

Copyright © 2019 VBRI Press

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

Full Article

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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