【摘要】 本研究采用微波固相法制备掺铝氧化锌导电粉,通过多种分析方法,讨论了Al³⁺掺杂量、合成温度和保温时间等因素对粉体结构及导电性能的影响。实验结果表明:掺铝ZnO粉体的电阻率随Al³⁺掺杂量的增加先降低后增加,微波合成法提高了Al³⁺在ZnO中的固溶量,当Al³⁺的掺杂量为1.5mol%时,导电粉的电阻率最低,为9.8kΩ·cm。微波合成法的最佳烧成制度是1300℃保温2h。粉体的形貌受煅烧温度影响较大,微波加热法对改善粉体的团聚、降低粒径和增加均匀性具有积极作用。更多还原

【Abstract】 In this paper, the microwave solid-phase method was adopted to prepare aluminum-doped zinc oxide conductive powders. The morphology, structure and conductivity of the powders were experimentally investigated by taking Al³⁺ doping content, synthesis temperature and holding time into accounts Experimental results show that the resistivity of the ZnO powder doped with aluminum decreases first and then increases with the increase of Al³⁺ doping content, getting its minimum value, which is 9.8 kΩ·cm, at the Al³⁺ doping content of 1.5 mol%. The solid solubility of Al³⁺ in ZnO is improved by the microwave synthesis. The optimum synthesis condition of the microwave synthesis is 1300℃ for 2 h. The morphology of the powders is seriously affected by the calcination temperature, and the microwave heating method could improve the agglomeration, decrease the particle size and increase the homogeneity of the powders effectively.更多还原