1. Introduction Results and discussion
Effect of Addition of Clays in Pore Formation During Fabrication of Porous Ceramic Supports
Arkaprava Mandal1,, Sunava Paul 1, Subhas Das1 , Swachchha Majumdar*1, Ganesh Shahoo1, Awadesh Mallik1
1Ceramic Membrane Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata , India
Introduction
Results and discussion
Objective: Primary objective of this work is to develop a standard fabrication technology for micro porous ceramic support preparation. This project involves development of standardized, versatile and adjustable manufacturing process for production of porous ceramic membranes of different size and geometry using varying compositions. Different types of clays were used for the purpose. Previously work has been done indigenously but some lacks were there.
A fabrication protocol was developed successfully. Initially we started with pellet preparation and shifted to the extrusion process later on. b a b
FE SEM image of sintered alumina-clay pellet sample with (a) C1(with clay 1) and (b) C2 (with clay 2)
Porosity data from mercury intrusion (Tab. 2)
FE SEM Image of fracture surface of (a) International manufacturer (b) indigenously extruded support
Clay Name
Apparent Porosity
(%)
Total Porosity
Clay 1 34 39
Clay 2 23 29
Materials and Method
Schematic representation of pellet preparation
Mixing of alumina and clay in a pot mill
Sintering of pellet
Dried in Hot air oven
Pelletized at high pressure
Mixed with Binder
Uniaxial press
Pellet
Schematic representation of tube preparation by extrusion
Weighing of
Materials at proportion
Extrude
Tubes of OD 10 mm and ID 7 mm
Sintering of the Tubes
Mixing in Sigma Mixture
Stored in Humid Condition
Porosity distribution of C1 sample
Porosity distribution of C2 sample
Conclusion
A protocol was developed for the fabrication process.
Sample C1 with clay 1 resulted higher porosity i.e higher flux is expected from this product.
Sample C1 succefully extruded and sintered. Samples were sent for further characterisation.
Tubes
Single Screw Extruder
Sample ID & Composition (Tab. 1)
Acknowledgement
Sample ID
Clay
Alumina C1
Clay 1
97% C2
Clay 2
The authors like to thank Director, CSIR-CGCRI, for kind permission to work in this project.
The financial support from the Department of Science and Technology, Government of India vide Grant No. DST /TSG/NTS/2015/89- C dated 31/05/2015 is gratefully acknowledged.