本文旨在利用稳态平板法，通过构建液体热传导的测试装置，改变水和氯化钠盐的混合比例，观察热传导和散热达到稳定时温度的数值和变化速率.实验使用质量浓度为0%、4%、8%、12%以及16%的氯化钠盐水溶液，测量以上不同浓度盐水溶液的导热系数.实验结果表明，随着盐水浓度的增加，溶液的导热系数呈先增加而后趋于平稳的趋势.

The objective of this study is to observe the value and rate of change of temperature when heat conduction and heat dissipation are in equilibrium. To this end, a test setup for heat conduction in liquids is constructed by varying the concentration ratios of water and sodium chloride salt using the steadystate flat plate method. The experiments are conducted using aqueous sodium chloride saline solutions with mass concentrations of 0%, 4%, 8%, 12%, and 16% to measure the thermal conductivity of the saline solutions with different concentrations. The experimental results show that as the saltwater concentration increases, the thermal conductivity of the solution first increases and then tends to stabilize.