不同SiO2含量仿汝瓷釉的析晶行为研究

宋代汝瓷以其绝色天青釉色而著称于世，本文研究了不同SiO2含量对仿汝瓷釉中主晶相钙长石的析晶行为的影响。结构研究表明：在本实验釉式的组成范围内SiO2含量越少，越容易促进钙长石的析晶和生长；在1260℃-950℃。降温过程中，钙长石析晶均有发生，1050℃左右为析晶较快的温度范围；不同淬火温度样品颜色由翠绿向豆绿转变，分析认为随着淬火温度降低，由于低温氧化作用Fe^3＋增多，降低着绿色Fe^2＋含量；另一方面分析认为是钙长石析晶量增多，反射量和光散射增大，乳浊度增加。

Investigation of the effect of SiO2 content on crystallization behavior of Ru ware glazes

Ru wares are famous for its unique jade-like glaze with sky blue color. This beautiful color is ascribed to its particular chemical composition and crystalline-phase separated microstructure. In this study, the effect of SiO2 content＇on crystallization behavior of Ru ware glazes was investigated. It was found that Anorthite crystallization and growth was increased with SiO2 content decreasing in the range as given seger glaze formulas. Anorthite crystallization was available during the cooling temperatures of 1260℃-950℃, and 1050 ℃or so was the temperature range of the fastest Anorthite crystallization. The samples quenched in different temperatures rendered the colors from pure green to bean green. This is ascribed to two factors, one is the increment of the light scattering and reflection aroused by the large amount Of Anorthite crystalline; another is the decreasing amount of colorizing green Fe^2＋ due to the oxidation in the lower termperatures.