THE DEVELOPMENT OF CERAMICS CLAY BODY AND GLAZE FROM RECYCLING MATERIAL TO DECREASE PRODUCTION COSTS AND PRESERVING THE ENVIRONMENT

Abstract

Waste recycling is one of the interesting topics in academia and industry. This research has 2 sections. The first section focuses on rice husk ash recycling to substitute as silica in the system of ceramic clay body. The second section focuses on defining the possibility of developing a recycling glaze from recycled glass. For the first part, 11-point Biaxial Blend were used to corroborate the composition of ceramics clay body between rice husk ash and Bannasan Surajathanee ball clay. All of the raw materials were ground for 1 h, forming by slip casting and sintered at 1,200 and 1,250°C for 1 h. The test pieces were physical properties tested for firing shrinkage and water absorption. Test piece No. 5 (40% rice husk ash and 60% ball clay) sintered at 1,200°C were the best properties at 30.4% of water absorption, 52.98 apparent porosity and 9.38 % firing shrinkage. For the second part, the result shows a complete melting point of recycling glass is 1,200°C. Kaolin, Ranong province and transparency bottles were used as starting raw materials in this research. The recycling glass was mixed with kaolin by 21-point biaxial bland, ground and sintered at 1,200°C. The results show samples No. 15-16 had the best appearance such as completely melting, good transparency, fine cracking, glossy and slightly down to cover a pattern and emphasis. It can save more than 60% of the commercial raw material. It is also beneficial to the ceramics industry in terms of cost savings and preserving the environment.