本文針對固-液相變化材料微粒懸浮乳液以實驗方式量測其相關熱物性質包括粒徑、黏度、熔點、凝固點、潛熱量等，並進而探討其過冷現象。在相變化材料方面選用十四烷、十八烷以及二十烷。固液相變化的發生會影響乳液黏度隨溫度改變的情況，懸浮微粒為液體時乳液濃度上升對黏度的提高並無如於懸浮微粒為固體時發生黏度急速上升的現象，而是較為平緩的趨勢。乳液系統中的過冷現象主要受懸浮粒子粒徑的影響，粒子的增大將抑制過冷現象。此外，試圖利用雷射消熔法製備低熔點鎵(Ga)金屬的奈米顆粒，實驗結果顯示鎵顆粒形成及大小可經由雷射功率及界面活性劑濃度的改變進而控制之。

The present study performs an experimental study is mainly concerning pertinent thermophysical properties of solid-liquid phase change material (PCM) suspensions,
Including the PCM particle size ; viscosity, melting/freezing points, degree of supercooling, and latent heat of fusion of the PCM suspensions. The PCM considered in the experiment includes n-Tetradecane, n-Octadecane, and n-Eicosane. The suspension viscosity is found to be greatly increased with the concentration of PCM, depending on whether the PCM particles exist in the suspension as solid or liquid phase. Significant degree of supercooling has been detected in the PCM
suspension considered, showing a great bearing with the particle sizes. The increase of particle size tends to suppress markedly the degree of supercooling in the suspension. In addition, attempts have been undertaken to generate nanoparticles of a low-melting-point metal, Gallium, by means of a laser ablation technique. Results clearly demonstrate that the size and configuration of the Gallium nanoparticles generated can be controlled effectively by the power of pulse laser imposed a well as the concentration of surfactant introduced.

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