本文利用定位结晶法研究了氧化锌和硅酸锌两种晶种对硅酸锌结晶釉釉面晶花的影响,根据结晶动力学理论,对结晶釉中硅酸锌晶体的生长规律和结晶机理进行了探讨,并比较了不同晶种对硅酸锌晶体生长规律的影响.实验结果表明:采用氧化锌和硅酸锌作定位晶种的釉面晶花外观效果基本相同;釉熔体中硅酸锌晶体生长半径与保温时间成线性关系;不同的定位晶种对硅酸锌晶体的生长基本没有影响;结晶常数随着析晶保温温度的提高而增加,当析晶保温温度分别为1150 ℃,1100 ℃和1050 ℃时,所对应的结晶常数依次为1.0911,0.9996和0.7177;即使在同一析晶保温温度下,不同的保温时间段其结晶常数也不同.
The effects of different crystal seeds of ZnO and zinc silicate on the crystal patterns in crystalline glaze were studied by the locating of crystal seed. Based on the kinetics of high temperature crystallization, the mechanisms of zinc silicate crystal growth and crystallization were discussed. The results showed that the glaze appearance of ZnO seed in zinc silicate crystalline glaze is basically the same as that of zinc silicate seed; The radius of grown zinc silicate crystal is directly proportional to soaking time; The types of crystal seeds have little influence on the growth of zinc silicate crystal in the glaze; Crystallization constant increases with the enhancement of crystallization temperatures, the corresponding crystallization constant is 1.0911, 0.9996 and 0.7177 respectively while the crystallization temperatures are in sequence of 1150 ℃,1100 ℃ and 1050 ℃; even at the same crystallization temperature, crystallization constant also varies in different soaking time phases.
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