The Development of ceramic clay suitable for pottery from Nong Bua Rawe’s Colored clay mineral.

Abstract

This research studies about 1. Physical properties of clay from Nongbuaraway, Chaiyaphum province. 2. The Development of ceramic clay suitable for pottery from Nong Bua Rawe’s Colored clay mineral.

 Samples of Nong Bua Rawe’s Colored clay mineral. test with EDXEF Lap, slip casting ,throwing  and firing at 900 and 1,200 degree Celsius in oxidation atmosphere , about firing at 900 degree Nong Bua Rawe’s Colored clay mineralhas strength value 280.30Kg/cm²  , shrink value 9%, water absorption 12.16% , fire resistance and the color change to reddish brown but can not measure about strength value, shrink value ,water absorption ,non fire resistance and  the color change to dark gray at 1,200 degree. The finding show that the Nong Bua Rawe’s Colored clay mineral wasn’t  suitable for pottery . Purposive Sampling of 36 mixtures from Triaxial Diagram of Nongbuaraway’s clay ,kaolin and Quartz  were firing at 1,200 degree Celsius in oxidation atmosphere. The best ratio for pottery product is no. 19 is 30 percent Nongbuaraway’s clay, 30 percent kaolin and 40 percent Quartz, The mixture was stable during the shaping process and after firing the clay was strength value 427.43(Kg/cm²), shrink value 11%, water absorption 0 % , fire resistance and the color change to dark brown.