کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5468886 1519042 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stabilization of kaolin clay slurry with sodium silicate of different silicate moduli
ترجمه فارسی عنوان
تثبیت دوغاب خاک رس کائولین با سیلیکات سدیم از انواع مختلف سیلیکات
کلمات کلیدی
تثبیت شده کاهش یافته، مبادله ایون، کائولن، مدول سیلیکات، شیشه آب سدیم،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی
In the ceramic technological processes, the suspensions with high concentration of ceramic particles (> 60%) play a very important role because this let to obtain inter alia reasonable casting rates what is one of the most important steps during the ceramics manufacturing. The article shows the attempts to modify the rheological properties of concentrated ceramic slurries, based on kaolin KOC. Different alkali sodium silicate based stabilizers, i.e. sodium water glasses ((Na2SiO2)nO) of silicate moduli in the range 1.74-3.25, were used for the research. The flow curves were analyzed and the technological parameters of slurries were described. Special attention was paid to the stabilization of slurries with the use of sodium water glasses of higher silicate moduli (> 2). It was found that the best results of the stabilization of the kaolin slurry can be obtained while using sodium water glass of silicate moduli 2-2.5. Sodium water glasses of the moduli smaller than 2 precipitated free silica in the suspension and increased the alkalinity of ceramic slurry while those larger than 2.5 created independent silicate micelles, co-existing with the dispersed kaolin grains. The mechanisms appearing during the stabilization of ceramic slurry with the use of sodium water glass were ion exchange and, the so called depleted stabilization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 146, 15 September 2017, Pages 147-151
نویسندگان
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