Development of porcelain body using Tapah clay
2009
Shahrizan Mohammad Sahmoni | Shamshulbahrul Jawaha | Nor Azmah Abdul Kadir
Porcelain body is usually defined as a hard, white, translucent ceramic made by firing pure clay and then glazing it with variously coloured fusible materials. It is one of the ceramic materials made by heating raw materials, generally including clay in the form of kaolin, in a kiln to temperatures between 1,200 °C and 1,400°C. The toughness, strength, and translucency of porcelain arise mainly from the formation of glass and the mineral mullite within the fired body at these high temperatures. Porcelain pottery results from heating refined materials such as clay at high temperatures. When mixed with water, these materials form a plastic body that can be worked to a required shape before firing in a kiln. Porcelain body can be produced using triaxial blends formulas. A study was carried out using clay material from Tapah, Kuching, Sarawak to form porcelain body. Different percentage s (30 to 70 %) of Tapah clay was used inside the mixture of silica, feldspar and kaolin. The test samples were fired between 900°C to 1250°C. The samples were glazed and analysed for compatibility. The modulus of rupture (using Gabrielli M o.R Equipment), bulk density and water absorption of the test samples of porcelain body was determined. The moisture content was analysed at 110° C using Precisa Moisture Balance.
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