我们现在一般使用的变色漆,一种是碘化银与碘化汞的复盐化合物,它的化学分子式为2AgI·HgI_2,常温时呈黄色,在50℃时开始由黄色变红色。另一种是碘化铜与碘化汞的复盐化合物;它的分子式为2CuI·2HgI_2,常温时呈红色,在70℃时开始由红色变蓝色。这两种变色漆的变色反应是可逆的,当温度升高时颜色改变,而当温度降低时颜色也跟着变了回来,它只能显示设备、器具的表面当时温度。这里特来介绍我们试验配制成功的一种能够显示温度峰值的变色漆,它的特性是当被测处的温度升高时颜色跟着变了过去,但是当温度降低时颜色并不变回来,除非再有更高于以前的最高温度时,才能接着变色。这样变色的现象也可叫做“不可逆反应”。因此它能自动的记录在过去一段时间内曾经发生过的最高 We are now commonly used color varnish, one is a complex salt of silver iodide and mercuric iodide compounds, its chemical formula is 2AgI · HgI_2, yellow at room temperature, began to change from yellow to red at 50 ℃. The other is a complex salt compound of copper iodide and mercuric iodide; its molecular formula is 2CuI · 2HgI_2, which is red at room temperature and starts to change from red to blue at 70 ° C. The discoloration reaction of these two color change paints is reversible, the color changes as the temperature rises, and the color changes back as the temperature decreases, which shows only the current temperature of the surface of the apparatus, appliance. Here to introduce our experimentally prepared a display of the temperature peak of the varnish, which is characterized by the measured temperature increases with the color changed with the past, but when the temperature decreases, the color does not change back unless And then higher than the previous highest temperature, then the color can be followed. This phenomenon of discoloration can also be called “irreversible reaction.” So it automatically records the highest that has happened in the past period