TONG Yuandong ¹, CHEN Yongqiang ¹, LI Jiake ^{1, 2}, TANG Xiaoyong ¹, WANG Zhiliang ¹, XIAO Zhuohao ²
(1. Jingdezhen Lehua Ceramic Sanitary Ware Co., Ltd, Jingdezhen, 333414, Jiangxi, China; 2. School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen, 333403, Jiangxi, China)

Abstract:  Iron-red microcrystal glaze was prepared at 1240-1300 ℃, with feldspar, quartz, kaolin, limestone, talc and iron oxide as the raw materials. The effects of content of iron oxide, firing temperature and soaking time on glaze quality and forming mechanism were studied. Phase composition and microstructure of the samples were studied by using XRD and SEM. It was found that iron-red microcrystal glaze with promising quality can be obtained, when the batch formula of the glaze consisted of (wt.%) 26.2% potassium feldspar, 11.2% sodium feldspar, 26.2% quartz, 11.2% kaolin, 7.4% limestone, 5.6% talc and 11-13% iron oxide, with firing temperatures of 1260-1280 ℃ and time durations of 30-45 min.
Key words:  iron-red microcrystal glaze; iron oxide; firing temperature; glaze quality