To obtain the cubical coefficients of thermal expansion of a mixed system of flaky dust and alkane liquid, the volume and pressure of the mixed system under different temperatures and volume fractions of aluminum powder were measured. On the basis of the experimental results, the cubical coefficients of thermal expansion under the corresponding conditions were calculated and the effect of each influencing factor was obtained. The results show that since the volume of each phase component in the system increases with temperature, the volume of the mixed system also increases with temperature. With increasing temperature, the cubical coefficients of thermal expansion of the mixed system generally increase. Affected by the increase in mass concentration of low-expansion-coefficient substances, an increase in the volume fraction of aluminum powder results in a decrease in the volume thermal expansion coefficient of the mixed system. At the same time, due to the changes in the state of the mixed system, the mass fraction of aluminum powder decreased sharply within a certain range. The low mass fraction of aluminum powder weakens the supporting effect of the metal particle skeleton, the thermal expansion properties of the liquid dominate the mixed system, and the volume thermal expansion coefficient is high. The high aluminum powder mass fraction creates the metal particle skeleton, the metal thermal expansion properties dominate the mixed system, and the volume thermal expansion coefficient is low.

中文翻译：

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片状粉尘与烷烃液体混合体系的热膨胀特性研究

为了得到片状粉尘和烷烃液体混合体系的立方热膨胀系数，测量了不同温度和铝粉体积分数下混合体系的体积和压力。在实验结果的基础上，计算了相应条件下的立方热膨胀系数，得到了各影响因素的影响。结果表明，由于体系中各相组分的体积随温度增加，混合体系的体积也随温度增加。随着温度的升高，混合体系的立方热膨胀系数普遍增加。受低膨胀系数物质质量浓度增加的影响，铝粉体积分数的增加导致混合体系体积热膨胀系数的降低。同时，由于混合体系状态的变化，铝粉的质量分数在一定范围内急剧下降。铝粉的低质量分数削弱了金属颗粒骨架的支撑作用，液体的热膨胀特性在混合体系中占主导地位，体积热膨胀系数高。高铝粉质量分数形成金属颗粒骨架，金属热膨胀性能在混合体系中占主导地位，体积热膨胀系数低。由于混合体系状态的变化，铝粉的质量分数在一定范围内急剧下降。铝粉的低质量分数削弱了金属颗粒骨架的支撑作用，液体的热膨胀特性在混合体系中占主导地位，体积热膨胀系数高。高铝粉质量分数形成金属颗粒骨架，金属热膨胀性能在混合体系中占主导地位，体积热膨胀系数低。由于混合体系状态的变化，铝粉的质量分数在一定范围内急剧下降。铝粉的低质量分数削弱了金属颗粒骨架的支撑作用，液体的热膨胀特性在混合体系中占主导地位，体积热膨胀系数高。高铝粉质量分数形成金属颗粒骨架，金属热膨胀性能在混合体系中占主导地位，体积热膨胀系数低。体积热膨胀系数高。高铝粉质量分数形成金属颗粒骨架，金属热膨胀性能在混合体系中占主导地位，体积热膨胀系数低。体积热膨胀系数高。高铝粉质量分数形成金属颗粒骨架，金属热膨胀性能在混合体系中占主导地位，体积热膨胀系数低。