讨论了一种表面张力测量方法一轮廓曲线吻合法。它是一种应用计算机技术，用数字图像信息处理液滴轮廓的方法。应用数字图像测量和信息处理技术，将置于氮化硼水平平板上的Li2B4O7+KNbO3液滴的轮廓图像记录在录像带上，然后转换成数字图像数据，并与理论方程的数值解吻合，求得表面张力系数。用这种方法侧得的Li2B4O7+KNbO3溶液的表面张力温度系数和表面张力溶质系数分别为γT(mN/m)＝210+0.15(T-900℃),900℃ T 1000℃;γc(mN/m)＝229-0.45(CKN--10wt％),10wt％ CKN 30wt％。
A method for measuring the surface tension—Contour Curve Fitting Method, which is determined by digital video image processing of a sessile drop with using computer was discussed. The image of a sessile drop of Li2B4O7+KNbO3 formed on a BN plate was recorded on a digital video tape and converted into digital data of profile by using the technique of digital image acqui sition and processing. The Segmented drop image was fitted with numerical solution of theoretical equations to determine a surface tension. The thermal and solute surface tension coefficients were given by the following forms respectively, γT(mN/m)＝210+0.15(T-900℃), 900℃＜ T＜1000℃and γc (mN/m)＝229-0.45(CKN-10wt%), 10wt%＜ CKN ＜30wt%.
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