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 γΤ（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 acquisition 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%.
参考文献
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