The effect of recycled waste porcelain on sinterability of ceramic ware

摘要

Recycling of waste porcelain body from ceramic industries is an important issue from the environmental and economic points of views. Porcelain ceramics were prepared using recycled waste porcelain and the effect of the recycled porcelain addition on the sintering property of the porcelain ceramics was investigated. The waste porcelain fragments with rough and irregular shapes were crushed and ball-milled. The obtained waste porcelain powder, the recycled porcelain, with particle size of 0.5-2.0μm was added to normal ceramic raw materials for the preparation of porcelain ceramics. The porcelain ceramics with 30 wt% of the recycled powder sintered at 1200°C showed the highest sintered density of 2.5 g/cm3. When sintered above 1300°C, many cracks and pores observed in porcelain body due to over sintering and preferential shrinkage during cooling.