A Study of Ca-Mg Silicate Crystalline Glazes ——An Analysis on Forms of Crystals |
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作者姓名: | LIUPei-de YUPing-li WUJi-huai |
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作者单位: | InstituteofMaterialPhysicalChemistry,HuaqiaoUniversity,Quanzhou362011,P.R.China |
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基金项目: | Supported by the Natural Science Foundation of Fujian Province(No.D0 2 10 0 12 ) |
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摘 要: | In the study on Ca-Mg silicate crystalline glazes, we found some disequilibrated crystallization phenomena,such as non-crystallographic small angle forking and spheroidal growth, parasitism and wedging-form of crystals, dendritic growth, secondary nucleation, etc. Those phenomena possibly resulted from two factors:(1) partial temperature gradient, which is caused by heat asymmetry in the electrical resistance furnace,when crystals crystalize from silicate melt; (2) constitutional supercooling near the surface of crystals. The disparity of disequilibrated crystallization phenomena in different main crystalline phases causes various morphological features of the crystal aggregates. At the same time, disequilibrated crystallization causes great stress retained in the crystals, which results in cracks in glazes when the temperature drops. According to the results, the authors analyzed those phenomena and displayed correlative figures and data.
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关 键 词: | 钙镁硅酸盐 晶体光滑剂 过冷度 热动力条件 晶体形态学特征 |
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