DEVELOPMENT OF STONEWARE PRODUCTS COMPONENT FROM BAN THUNG LUANG CLAY, SUKHOTHAI

Abstract

    This research is an experimental study with the following objectives: To develop mixing ratios and study the physical properties of stoneware products. To establish selection criteria as a guideline for stoneware development and determine the most suitable mixing ratio according to the product standards. The experiment utilized three main raw materials: Thung Luang clay, Lampang clay, and Rayong sand. Samples were selected using a purposeful sampling method based on an equilateral triangular diagram, weighed with a digital balance, mixed using a high-speed mixer, and fired at 1230°C in an electric kiln. The research results showed that the formulation which best met the criteria and was most suitable for stoneware products consisted of 60% Thung Luang clay, 10% Lampang white clay, and 30% Rayong sand. This composition exhibited a water absorption of 2.70%, a flexural strength of 255.02 kg/cm², and a firing shrinkage of 9.50%.