The effect of chlorine, fluorine and water on the viscosity of aluminosilicate melts
The effect of chlorine, fluorine and water on the viscosity of aluminosilicate melts
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DOI：
10.1016/j.chemgeo.2013.08.020
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发表时间：
2013-10
期刊：
影响因子：
3.9
通讯作者：
A. Baasner;B. Schmidt;S. Webb
中科院分区：
文献类型：
--
作者：
A. Baasner;B. Schmidt;S. Webb
采用微渗透法在 109 至 109 的范围内研究了 1.6 至 14.5 mol% 水、1.1 至 18.3 mol% 氟 (F) 和 0.5 至 1.4 mol% 氯 (Cl) 对作为响岩模型体系的过碱性和过铝质 Na2O–CaO–Al2O3–SiO2 熔体粘度的影响。 1013帕秒。水和F单独或组合会非线性地降低粘度。随着F和水浓度的增加，进一步添加F和水在降低粘度方面变得不太有效。水对过铝熔体粘度的降低作用比对过碱性熔体的粘度影响更大。在无卤过铝样品中，5 mol% 水使 Tg12（粘度 = 1012Pa s 时的温度）降低 259 ± 5 K，而在无卤过碱性样品中，5 mol% 水使 Tg12 降低 189 ± 5 K。氟（以 mol% 计）使 Na2O–CaO–Al2O3–SiO2 的粘度降低，熔点较小比水。在过铝熔体中，添加 5 mol% F 会使 Tg12 降低约 95 K。在过碱性熔体中，添加 5 mol% F 会使 Tg12 降低约 30 K。然而，仅在 F 浓度达到 1.9 mol% F 时才观察到 Tg12 显着降低，而另一个含 6.2 mol% F 的样品则没有显示 Tg12 进一步降低。在所有单独含有 F 或与 Cl 组合的含水过铝和过碱性样品中，由于添加水而导致的粘度降低小于无卤素样品。在含 18.3 mol% F 的过铝熔体中，与干燥熔体相比，添加 5 mol% 水会使 Tg12 降低约 152 ± 5 K。与干熔体相比，在含 1.9 mol% F 的全碱性熔体中，添加 5 mol% 水会使 Tg12 降低约 146 ± 5 K。在这两种情况下，该值都显着低于无卤素样品。在过碱性熔体中，加入水后，Cl 对粘度的降低没有影响。水和Cl对粘度的影响是相互独立且相加的。水和 F 对粘度的影响不是独立的，在全碱性样品的情况下，这可能与由于水的存在而导致的 F 形态变化有关。
The influence of 1.6 to 14.5 mol% water, 1.1 to 18.3 mol% fluorine (F) and 0.5 to 1.4 mol% chlorine (Cl) on the viscosity of peralkaline and peraluminous Na2O–CaO–Al2O3–SiO2melts as a model system for phonolites was studied with the micropenetration method within the range of 109to 1013Pa s. Water and F alone and combined decrease viscosity non-linearly. With increasing F and water concentration the further addition of F and water becomes less effective in decreasing viscosity. Water decreases the viscosity of peraluminous melts more strongly than that of peralkaline melts. In the halogen-free peraluminous sample 5 mol% water decreasesTg12(the temperature where the viscosity = 1012Pa s) by 259 ± 5 K, while in the halogen-free peralkaline sample 5 mol% water decreasesTg12by 189 ± 5 K. Fluorine (on a mol% basis) decreases the viscosity of Na2O–CaO–Al2O3–SiO2melts less than water. In the peraluminous melts the addition of 5 mol% F decreasesTg12by ~ 95 K. In the peralkaline melt 5 mol% F decreasesTg12by ~ 30 K. However, a significant decrease inTg12was only observed up to a F concentration of 1.9 mol% F, another sample with 6.2 mol% F showed no further decrease ofTg12. In all hydrous peraluminous and peralkaline samples that contain F alone or combined with Cl, the decrease of viscosity due to the addition of water is smaller than in the halogen-free samples. In a peraluminous melt with 18.3 mol% F the addition of 5 mol% water decreasesTg12by about 152 ± 5 K compared to the dry melt. In a peralkaline melt with 1.9 mol% F the addition of 5 mol% water decreasesTg12by about 146 ± 5 K compared to the dry melt. In both cases this is significantly less than for the halogen-free samples. In peralkaline melts Cl has no influence on the decrease in viscosity upon the addition of water. The effects of water and Cl on viscosity are independent of each other and add together. The effects of water and F on viscosity are not independent, which could be, in the case of the peralkaline samples related to changes in F speciation due to the presence of water.