烧成制度对R2O-CaO-Al2O3-B2O3-SiO2分相乳浊釉的影响研究

杨瑞强; 汪永清; 刘韩; 周健儿; 董伟霞

人工晶体学报, 2020, 49 (5): 913, 网络出版: 2020-08-06

烧成制度对R₂O-CaO-Al₂O₃-B₂O₃-SiO₂分相乳浊釉的影响研究

Effect of Sintering System on Phase-separated Opaque Glaze of R₂O-CaO-Al₂O₃-B₂O₃-SiO₂

论文大纲

杨瑞强 ^*汪永清刘韩周健儿董伟霞

作者单位

景德镇陶瓷大学材料科学与工程学院，景德镇 333403

乳浊釉分相液滴扩散烧成制度 opaque glaze phase separation droplet diffusion sintering system

摘要

用DSC、色度仪、XRD、SEM等仪器对R2O-CaO-Al2O3-B2O3-SiO2分相乳浊釉样品进行检测分析，探究烧成制度对釉面性状及显微结构的影响。结果表明，升温速率快慢影响釉中组分扩散和迁移的时间，致使釉中分相液滴的尺寸分布、平均粒径、体积分数产生变化，釉面呈现乳蓝、乳白等效果; 提高烧成温度可促进釉层中组分的相互扩散，在1 160～1 220 ℃范围内可得到白度大于70%的光亮乳浊釉面，温度过高容易导致釉面出现针孔缺陷; 降温冷却过程中釉熔体在热力学和动力学相互作用下发生分相现象，分相液滴的组分、形貌和尺寸是此过程中某一瞬时的平衡态，因此降温冷却过程对分相乳浊釉有重要影响。

Abstract

This experiment samples were analysed by DSC, colorimeter, XRD, SEM and other instruments to explore the effect of sintering system on the phase-separated opaque glaze and its effect mechanism in R2O-CaO-Al2O3-B2O3-SiO2 system. The results show that the change of heating-rate affects the diffusion and migration time of the components in the glaze, causing the size distribution, average particle size and volume fraction of the phase-separated droplets change, resulting the glazed surface exhibits opaque blue and white effects. Increasing the firing-temperature can promote the mutual diffusion of the components in the glaze, and the bright opaque glaze with whiteness ≥70% can be obtained in the range of 1 160-1 220 ℃. Higher firing- temperature tends to cause the pinhole defects in the glaze surface. The phase separation of the glaze melt occurs continuously under the interaction of thermodynamics and kinetics of glaze melt during the cooling process, meanwhile, the final composition, morphology and size of the phase-separated droplets are in a momentary equilibrium state during the cooling process. Therefore, the cooling process has an important effect on the phase-separated opaque glaze.

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杨瑞强, 汪永清, 刘韩, 周健儿, 董伟霞. 烧成制度对R₂O-CaO-Al₂O₃-B₂O₃-SiO₂分相乳浊釉的影响研究[J]. 人工晶体学报, 2020, 49(5): 913. YANG Ruiqiang, WANG Yongqing, LIU Han, ZHOU Jianer, DONG Weixia. Effect of Sintering System on Phase-separated Opaque Glaze of R₂O-CaO-Al₂O₃-B₂O₃-SiO₂[J]. Journal of Synthetic Crystals, 2020, 49(5): 913.

烧成制度对R₂O-CaO-Al₂O₃-B₂O₃-SiO₂分相乳浊釉的影响研究

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