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Optimization of Conditions For Fabrication of a Ceramic Component Through Gel-Casting Technique


Affiliations
1 Department of Chemistry, Veer Surendra Sai University of Technology, Burla –768 018, Odisha, India
2 Department of Chemistry, Veer Surendra Sai University of Technology, Burla –768 018, India
3 Department of Materials Chemistry, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar –751 013, Odisha, India

Gel-casting technique has been used for the production of alumina ceramic component. It is an attractive novel ceramic forming process for making high quality complex shaped ceramic part. The optimization of the alumina loading, pH, dispersant and catalyst amount has been successfully carried out for fabrication of high strength alumina component. A high green strength of alumina component is fabricated with 55 volume% slurry, for which 220 g of alumina powder, Darvan 821A (1.0 mg/g of alumina), N-(hydroxymethyl) acrylamide, 10 wt% initiator ammonium persulfate and 10 wt% catalyst tetra-methylethylenediamine).After slurry preparation, casting and subsequent drying is done by slow heating. The green body and the component obtained after binder burn out have been characterized through scanning electron microscope and X-ray diffraction techniques.

Keywords

Alumina suspension, Ceramic, Darvan 821A, Dispersant, Gel casting
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  • Optimization of Conditions For Fabrication of a Ceramic Component Through Gel-Casting Technique

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Authors

Rupashree Dash
Department of Chemistry, Veer Surendra Sai University of Technology, Burla –768 018, Odisha, India
Sukalyan Dash
Department of Chemistry, Veer Surendra Sai University of Technology, Burla –768 018, India
Laxmidhar Besra
Department of Materials Chemistry, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar –751 013, Odisha, India

Abstract


Gel-casting technique has been used for the production of alumina ceramic component. It is an attractive novel ceramic forming process for making high quality complex shaped ceramic part. The optimization of the alumina loading, pH, dispersant and catalyst amount has been successfully carried out for fabrication of high strength alumina component. A high green strength of alumina component is fabricated with 55 volume% slurry, for which 220 g of alumina powder, Darvan 821A (1.0 mg/g of alumina), N-(hydroxymethyl) acrylamide, 10 wt% initiator ammonium persulfate and 10 wt% catalyst tetra-methylethylenediamine).After slurry preparation, casting and subsequent drying is done by slow heating. The green body and the component obtained after binder burn out have been characterized through scanning electron microscope and X-ray diffraction techniques.

Keywords


Alumina suspension, Ceramic, Darvan 821A, Dispersant, Gel casting