使用氨水溶解硫酸铜，加入氢氧化钡沉淀分离硫酸根，所得铜氨清液加热蒸氨得氢氧化铜超细沉淀．沉淀分别用氨水和无水乙醇洗涤，60℃干燥，放置干燥器中至恒重．XRD、TEM、IcP测定表明，其平均粒径尺寸为45 nm，粒度分布范围窄，纯度高．用高精密全自动量热仪在78～370 K温区测定了热容，拟合出热容随温度变化的多项式方程，并对此氨浸新工艺--均匀沉淀法和有关的热力学性质进行了讨论．
The Cu(OH) 2 nanometric powders were prepared by a new method of homogeneous precipitation.The CuSO4 was dissolved in ammonia and the SO42- was removed by adding Ba(OH)2. The filtrate was heatedto remove ammonia and the Cu(OH) 2 was homogeneously deposited. The deposition was washed by ammoniaand ethanol, and the product was dried at 60 ℃, and then put in a desiccator to keep constant weight. Thegained powders were examined by XRD, TEM and ICP techniques and the results show that the grain size ofCu(OH) 2 nanometric powders is 45 nm in average within a narrow distribution range, and the powders arehighly purified. The heat capacity of the powders was measured in the temperature range of 78 ～ 370 K, andthe polynomial equations expressing the change of heat capacity with temperature was fitted. The ammonialeach techniques and thermodynamic properties were discussed.
参考文献
| [1] | 天津化工研究院.无机盐工业手册[M].北京:化学工业出版社,1988 |
| [2] | 蒋志坚;马毓龙.可湿性粉剂[M].北京:化学工业出版社,1991 |
| [3] | 方国;刘祖黎;胡一帆 等.CuO-SnO2纳米晶粉料的Sol-Gel制备及表征[J].无机材料学报,1996,11(03):537-541. |
| [4] | Wang L;TAN Z C;Zhang J B et al.Heat capacities of Al62.5Cu25Fe12. 5 quasierystals and B2 related crystals[J].Thermochimica Acta,1999,331:21-25. |
| [5] | Tan Z C;ZHOU L X;CHEN S X et al.An automatic adiabatic calorimeter for heat capacity mesurements from 80 to 400 K-Heat capacities of a-alumina and nheptane[J].中国科学B辑(英文版),1983,26:1014-1026. |
| [6] | 吴新明,邸友莹,谭志诚,屈松生.锐钛矿型TiO2纳米粉的低温热容研究[J].无机材料学报,2001(01):159-164. |
| [7] | 唐超群;章天金;吴新明 .YSZ超细粉末的溶胶-凝胶法制备[J].材料科学与工艺,1997,5(02):49-52. |
| [8] | B K潘普林;刘如水;沈德中.晶体生长[M].北京:中国建筑工业出版社,1981 |
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