本文将烟酸引入以硬脂酸银为银源的热敏成像材料中,可以明显提高显影密度,并使影像颜色由金黄色变成黑色;同时显影银粒子的尺寸变大、形貌也会发生改变,并且显影银粒子像链珠一样排成一条线,而线与线之间基本上是平行排列的.进一步实验结果表明,烟酸的引入会降低材料的pH、pAg值和银盐的相变温度,硬脂酸银与烟酸一起加热可能反应生成了新的化合物.
Nicotinic acid was introduced as a toner into the thermographic material based on silver stearate(AgSt). The results showed that nicotinic acid obviously increased the developed silver density, changed the image color from golden-yellow to black, altered the morphology of developed silver particle, enlarged the silver particle size, and aligned the silver particles as paralleled chains of pearls. Further study revealed that nicotinic acid lowered the thermal transition temperature of the silver source and the values of pH and pAg in the emulsion of the said material. Novel silver carboxylate complex may have been resulted by heating the mixture of AgSt and Nicotinic acid.
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