溶融ガラスの粘度に関する研究(第1報) : 球引上げ法による粘度の測定

概要

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A platinum ball pulling-up method and an apparatus for measuring the viscosities from 10 to 10^4 poises of molten glass are described. The apparatus of modified balanced type is shown schematically in Fig. 1. In this method the rate of rise of the ball under a constant load is measured. The calibration factors for the frictional errors were determined in advance. Fig. 2 shows the correction curve, where the required correction of clock reading is plotted against the applied load. For the purpose of obtaining the most precise result the authors estimated the suitable applied load, from the tests used castol oil, water glass, and millet jelly, at 0.1-0.2 gr at 10-20 poises, 5-10 gr at 10^3 poises, and 10-15 gr at 10^4 poises. And then the viscosities of four different commercial glasses were measured at temperatures ranging from 1000゜ to 1500℃. It is a rapid and convenient method and is believed to be more practical for plant laboratories than the other available methods.
社団法人日本材料学会の論文
1959-07-15