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Preparation of Cyan Glaze
Author(s): 
Pages: 6-12
Year: Issue:  1
Journal: China Ceramic Industry

Keyword:  cyan glazepreparationtechnology;
Abstract: In this study, the influence of different recipes and the proportion of ferric oxide on cyan glaze color and the impact of calcium phosphate on recipes were observed. With further study on the influence of the preparation technique and firing system on experiment results, the firing schedule can be decided. As the results show, if the recipe is as follows: potassium feldspar 43%, quartz 23.7%, clay 7.9%, alumina 4.9%, calcined talc 8.9%, calcite 4%, barium carbonate 4%, calcium phosphate 3% and ferric oxide 1.2%. When fired at 1290°C and heat soaked for 3h, the obtained sample glaze was uniform and well-colored. Through experiment, the recipe of cyan glaze was determined. The experiment results show the proportion of ferric oxide plays a significant role in the coloration of the glaze and the optimum proportion is 1.2%. Besides, the calcium phosphate has a great impact as well and the adequate proportion should be 35%. If the proportion is too high, the excessive opacification could lead to the eclipsing of cyan color and the glaze could not show the texture of jade when the proportion is too low. The color also has something to do with the thickness of the glaze layer. The thinner the layer, the lower the gloss of the glaze. In contrast, if the layer is too thick, the glaze is more liable to running and other defects.
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