中温氧化双层花釉的反应过程研究

Reaction Process Research on Medium-Temperature Oxidized Double-Layer Fancy Glaze

为研究中温氧化双层花釉的反应过程,本文通过体视显微镜和SEM/EDS对釉样表面及断面进行形貌观测和微区成分分析。结果表明,当温度升至950℃时釉料开始熔融,底釉和面釉的扩散主要以化学浓度梯度和重力作用为推动力通过接触面进行,底釉中可以检测到P元素,而面釉中尚未检测到Fe元素。1000℃时扩散作用加剧,着色氧化物Fe 2O 3开始熔融致使底釉由红色转变为黄色,釉中气泡的搅动促进组分扩散迁移,Fe和P元素在底釉与面釉中均有分布。1100℃时大尺寸气泡冲散面釉破裂排出,底釉被带至釉表面回填气泡排出后的凹坑,形成面釉白色与底釉褐色相间的花釉图纹。双层花釉的反应通过组分扩散和气泡搅动进行,且釉面效果主要在升温阶段形成。

The Stereomicroscope and SEM/EDS were utilized to observe the appearance and analyze the micro-area composition of the surface and fracture surface of the glaze samples for researching the reaction process of the medium-temperature oxidized double-layer fancy glaze.The results show that the glaze begins to melt when the temperature rises to 950℃,meanwhile,the diffusion of the base glaze and the top glaze is mainly driven by the chemical concentration gradient and gravity through the contact area,moreover,the P element of the top glaze can be detected in the base glaze but the Fe element of the base glaze has not been detected in the top glaze.The diffusion effect has increased and the base glaze changed from red to yellow because the Fe 2O 3 begins to melt at 1000℃.The agitation of the bubbles in the glaze promotes the fusion of the base glaze and the top glaze.Fe and P elements are both detected in the base glaze and the top glaze.The large-sized bubbles burst the glaze surface and discharge,which causes the base glaze is brought to the glaze surface for filling back the pits after the bubbles are discharged,forming the fancy glaze pattern with the white and brown color at 1100℃.The double-layer fancy glaze reaction is carried out by the component diffusion and bubble agitation,and the glaze appearance is mainly formed during the temperature-rise period.