纳米铜粉的制备及其对高氯酸铵热分解催化性能的研究

Preparation of Nanometer Cu Powder and Study on Its Catalytic Characteristic of Thermal Decomposition of Ammonium Perchlorate

在溶液中采用还原法制备出粒度约20nm的晶态纳米铜粒子.采用研磨复合法制备出纳米铜与微米高氯酸铵的复合粒子.DTA用来研究纳米铜对高氯酸铵热分解催化性能.其结果表明:纳米铜粉能够使高氯酸铵低温和高温放热峰温度分别降低35.1℃和130.2℃,并且使高氯酸铵的表观分解热提高了172.7%,对高氯酸铵的热分解表现出良好的催化作用.同时,探讨了其催化机理.

Crystal nanometer Cu powder, the average particle size of which is 20nm, is prepared in solution. The composite particle of the nanometer Cu and of micrometer ammonium perchlorate has been obtained by grinding. DTA was used to investigate the catalytic characteristics of the nanometer Cu. The findings show that the nanometer Cu makes both the low and the high temperature exothermic peak decrease 35.1℃ and 130.2℃ respectively, while the apparent decomposition heat of ammonium perchlorate increases by 172.7%, indicating that the nanometer Cu can produce very good catalytic effect on ammonium perchlorate. The catalytic mechanism of the nanometer Cu on the thermal decomposition of ammonium perchlorate is explored as well.