Abstract
We investigated the microstructure of the gold decoration layer of bone china to pinpoint the cause of the gold cracking occurring in the process of high quality bone china manufacturing. Through the cross-sectional TEM (transmission electron microscope) analysis it has been observed that SnO2 crystals from the matting agent that lies underneath the gold have undergone abnormal growth. As the few SnO2 crystals under the gold grow excessively, the matting oxide bursts through the gold layer resulting in the gold cracking in the bone china tableware. It is also found that the defects in the glossy gold area cause more serious detriment to the quality of the gold layer than do those in the matt gold area. From this study, we conclude that the control of the size distribution of SnO2 crystals is very important to keep high quality in the gold layer of bone china.
Published Version
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