알카리성에서 Ag_2O의 오존산화에 의한 AgO의 결정화에 관한 연구 = The Crystallization of AgO by the Ozonation of Ag_2O in Alkaline Solution

다국어 초록 (Multilingual Abstract)

This study concerns with the production of high density AgO through the ozonization of Ag_2O. It was possible to find the optimum condition by varying several factors such as the concentration of NaOH solution, temperature, addition of AgO seed, and of Ag_2O feed. The best condition was as follows; temperature, 80℃; NaOH concentration, 20%; reaction time, 6 days; amount of AgO seed, 9.5g.; amount of Ag_2O feed, 1.5g/4hr. The amount of ozone used throughout was 100gr/hr.
The density of final product was found not to depend on the density of seed, the amount of the feed, and of seed. These factors only influenced the reaction time.
The mechanism of AgO formation may be suggested to proceed throught the formation of Ag_2O_3 by the oxidation of Ag(OH)_2^- in alkaline solution. Ag_2O , the starting material then reacts with Ag_2O_3 to form the final product AgO.
Measurements showed that the purity of AgO product to be 95.84% and its density 3.72g/㏄. The X-ray diffracton pattern and microscopic picture of particle size are presented.
The continuous discharge capacity of the primary cell composed of AgO of this study was measured to be 56.8mAH under the resistance of 12,500ohms.
It shows that high density AgO prepared by ozonization of Ag_2O can be used in AgO primary battery.
In a separate experiment, AgO was prepared by electrolysis for comparison. But the density of the above AgO scarecely exceeded 2.11g/㏄. The density of pressed mass of the above was 2.2-2.4g/㏄.
Thus, direct ozonation of Ag_2O may be suggested as a superior method for the production of high density AgO.

목차 (Table of Contents)

• Ⅰ. 서 론
• Ⅱ. 실 험
• Ⅲ. 결과 및 고찰
• Ⅳ. 결 론