ZHU Qingxia, LIANG Huayin, SHAO Chuan, CHENG Si

(Jingdezhen Ceramic Institute, Jingdezhen Jiangxi 333001,China)

Abstract:The ceramic bodies were dried by general electric drying, infrared drying and microwave drying respectively. The effects of drying methods on drying rate and the temperature difference between the internal and the external of the ceramic body were investigated. The results show that hot-air drying was mainly realized by moisture concentration difference and the temperature difference between the internal and the external of the ceramic body was relatively large. Far-infrared drying resulted in the temperature uniformity throughout the ceramic body and its drying rate in the constant-speed stage was 1.2 times that of hot-air drying. For microwave drying, moisture diffusion was achieved mainly by temperature difference, and the maximum drying rate was up to 4.26% / min (about 12 times that of hot- air drying).

Key words :ceramic body; microwave drying; far-infrared drying; drying rate