奈米陶瓷粉體的製程中，液相法為最常使用的一種方法，因為以液相法製得之粒子均勻性最高，成本也最低，而脫水乾燥是其中一個最重要的步驟。目前工業界與學界對奈米陶瓷微粒有不同的乾燥方法，但每種方法都有不同程度之凝聚現象。
　　在本研究裡首先提出一真空乾燥機的理論，包括三個子系統：膨脹系統、吸濕系統及粉體收集系統，操作原理為欲利用真空乾燥在低壓時，液態溶液瞬間閃發成汽(氣態)，此時液滴會瞬間膨脹擴散，因水汽分子向外擴散，理論上應可避免粉體的凝聚，再利用濃溴化鋰溶液的強吸濕性持續帶走閃發後之水汽，來維持真空腔體之真空度，同時乾燥後的超細粉體也可在真空的環境下更有效率地快速收集。
　　溴化鋰吸濕系統是此真空乾燥機最關鍵的一個系統，能持續地吸收水汽才能達到連續乾燥的目的，研究者適度地修改ABSIM軟體來模擬此真空乾燥系統，並由模擬得到之結果設計吸濕系統，未來則以本設計為藍圖，作為測試水汽吸收率的吸濕實驗設備。

　　In terms of product quality, the liquid-phase method is considered the best method among several processes in the production of nano ceramic particles. Drying is therefore an essential procedure in this kind of production method. There are several methods for drying ceramic particles in the industries and academia, but different degrees of agglomeration are found during the drying process.
　　The researcher proposed “the vacuum drying device theory” firstly, the device including three systems: expansion system, absorption of water vapor into lithium bromide system, and particles collection system. The operating principle is that the liquid water will instantaneously flash into water vapor at low pressure state. The outward expansion force during flashing could be able to prevent agglomeration. And the low pressure can be maintained by way of the absorption water vapor by lithium bromide solutions continuously. Furthermore, the drying ceramic particles can be collected quickly.
　　Absorption of water vapor into LiBr system is the key point for vacuum drying device, and absorption of water vapor continuously is the final objective. The researcher modifies the ABSIM code modestly to simulate the vacuum drying system and design the absorption of water vapor system from the simulative conclusion. In the future work, the researcher use the designed system to set up the experimental equipment for testing.

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