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首页> 外文期刊>Glass Technology >A study of refining. Part 1: Measurements of the refining of a soda-lime-silica glass with and without refining agents
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A study of refining. Part 1: Measurements of the refining of a soda-lime-silica glass with and without refining agents

机译：精炼研究。第1部分：使用和不使用澄清剂的钠钙硅玻璃的澄清度测量

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The data presented here refer to 60 g melts of glass of composition in wt%, 73-5 SiO_2, 10-0 CaO, 16-5 Na_2O, founded in platinum in an electric furnace at 1400 and 1450°C. There was no significant convection of the melt. Melts were made at 1400° C, containing all possible combinations of 0, 0.10 and 0.50% As_2O_3 with 0, 1.00 and 5.00% Na_2O supplied as sodium peroxide. Four of these combinations were investigated in detail at 1400°C and two at 1450°C. By counting the seed remaining in 30 g slabs cast from melts founded for different times it was possible to construct graphs showing the decrease of total number (N) of seed per cm3 with time. This relation was approximately, but not exactly, exponential. The refining agents affected the number of seed present at the beginning of refining as well as the rate of refining; because of this it was concluded thatmelting and refining could not be considered as two independent processes. Measurements of seed size distributions allowed the decrease of the number of seed per cm3 (n), of given diameter (x), with time to be plotted. Most of the data were well fitted by an exponential relation between n and t. The refining agents altered the shapes of the seed size distributions and the rates at which seed disappeared. Small seed disappeared more slowly in melts containing 0.50% As_2O_3 and 5.0% Na_2O as Na_2O_2 than in melts containing 0.50% As_2O_3 and 1.0% Na_2O as Na_2O_2. This suggested that it was possible to supply too much oxygen for any given addition of As_2O_3. Raising the temperature had effects similar to some combinations of refining agents, affecting seed size distributions and rates of disappearance of seed.
机译：此处提供的数据涉及60 g重量百分比的玻璃熔体，73-5 SiO_2、10-0 CaO，16-5 Na_2O，在1400和1450°C的电炉中于铂中建立。熔体没有明显的对流。熔体在1400℃下制备，包含0、0.10和0.50％的As_2O_3与0、1.00和5.00％的Na_2O以过氧化钠形式提供的所有可能的组合。其中的四种组合在1400°C下进行了详细研究，另外两种在1450°C下进行了研究。通过对在不同时间建立的熔体浇铸的30克铸坯中剩余的种子进行计数，可以构建显示每cm3种子总数（N）随时间减少的图表。这种关系是近似的，但不完全是指数的。精制剂影响精制开始时存在的种子数量以及精制速度。因此，得出的结论是，不能将熔融和精炼视为两个独立的过程。种子尺寸分布的测量允许在给定直径（x）的情况下，每cm3（n）的种子数量随时间减少而减少。 n和t之间的指数关系很好地拟合了大多数数据。精制剂改变了种子大小分布的形状和种子消失的速率。与含有0.50％As_2O_3和1.0％Na_2O作为Na_2O_2的熔体相比，含有0.50％As_2O_3和5.0％Na_2O作为Na_2O_2的熔体中的小种子消失得更慢。这表明，对于任何给定的As_2O_3添加量，都可能提供过多的氧气。升高温度的作用类似于精制剂的某些组合，影响种子的大小分布和种子的消失速率。

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