Controlling of Solution Concentration on Nucleation during Hydrothermal Synthesis of Analcime

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题名:	Controlling of Solution Concentration on Nucleation during Hydrothermal Synthesis of Analcime
作者:	林義傑羅煥記宋聖榮方建能陳耀麟陳惠芬李麗君劉佳玫
贡献者:	地質系
关键词:	Analcime Synthetic glass Nucleation Concentration
日期:	2002-08
上传时间:	2016-07-26 13:39:16 (UTC+8)
摘要:	Hydrothermal experiments of analcime nucleation and glass dissolution were carried out in autoclaves under the conditions of autogeneous pressures, temperatures of 150℃~210℃, and 0.25 M~0.75 M NaOH solutions. The curves of the glass dissolution and analcime formation are S-shaped. Yet, the two curves are essentially parallel to each other. The time required for a complete dissolution of glass or the commencement of analcime formation is shorter when the concentration of NaOH solution or the temperature is higher. The amount of the weight percent of analcime synthesized is obviously less than the glass dissolved at a given time of an experiment. The weight difference between glass dissolved and analcime (dehydrated) formed is calculated to be represented as the solution concentration. During an experiment, the solution concentration increases gradually to a maximum, then decreases slowly to a constant value with time. On the other hand, nucleation is also gradually increased to a maximum, then is decreased finally to zero with time in a bell-shaped curve. It is clear that nucleation of analcime is mainly controlled by the solution concentration. rolled by the solution concentration.
關聯:	Journal of the Chinese Chemical Society 49:4 民91.08 頁495-498
显示于类别:	[地質系] 期刊論文

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