Method for inducing material to synchronously coagulate and nucleate within short time

The invention discloses a method for inducing a material to synchronously condense and nucleate in a short time. The method comprises the following steps: pre-filling gas into the material in advance and enabling the gas to be saturated; sub-packaging the materials, placing the materials in a freeze...

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Bibliographische Detailangaben
Hauptverfasser: YANG ZHI, LUO JIANJUN, JIA CHUNYUAN, ZHAO LILI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a method for inducing a material to synchronously condense and nucleate in a short time. The method comprises the following steps: pre-filling gas into the material in advance and enabling the gas to be saturated; sub-packaging the materials, placing the materials in a freeze dryer, and synchronously carrying out cooling and boosting processes, so that the materials are in a metastable state below a crystallization point; finally, the pressure of the freeze dryer is reduced to 5 psig or below within 10 seconds, so that gas in the material is rapidly volatilized, and the material is induced to be condensed and nucleated. Compared with the prior art, the method disclosed by the invention has the following advantages: (1) the method disclosed by the invention can realize synchronous crystallization in a short time in a relatively narrow specific temperature range; (2) the method can ensure that the material is uniformly coagulated and nucleated in the freeze-drying process, and does not n