Porous Red Clay-based Ceramics Prepared via Starch Consolidation-Pressure Cooking System  

Oleh:

Mosqueda, Alexander O. ; Adavan, Carl Rhamel M. ; Menchavez, Ruben L.

Jenis: Article from Proceeding
Dalam koleksi: The 14th Asia Pacific Industrial Engineering and Management Systems Conference (APIEMS), 3-6 December 2013 Cebu, Philippines, page 1-6.
Topik: Starch consolidation casting; pressure-cooking; red clay-based porous ceramics
Fulltext: 4007.pdf (395.87KB)

Isi artikel

This study shows the preparation of porous red clay-based ceramics by starch consolidation casting technique in a pressure-cooking system. Starch-loaded ceramic slurries were prepared from ternary powder mixture of 46.7 wt% Lama-lama clay, 18.00 wt% quartz and 35.30 wt% feldspar, and potato starch (8, 12 and 16 wt%). Molded and heated in a pressure cooker for 12 minutes to obtain a well formed cylindrical green body subject for sintering. Heating through pressure cooking system in porous ceramic processing can be an alternative to the conventional oven heating for its faster heating rate, high temperature processing and lower energy consumption. The effect of the amount of potato starch and sintering temperature on the apparent porosity, bulk density, linear shrinkage, and compressive strength of the sintered porous red clay-based ceramics was determined. Apparent porosity ranges from 42.53-49.64% depending on the starch content in the slurry. At a higher sintering temperature, higher linear shrinkage and compressive strength were obtained. Microstructure was examined by Scanning Electron Microscopy. A porous ceramic material made from a low cost powder like red clay, through an eco-friendly processing using starch and pressure-cooking system, is a promising green technology.

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