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采用共沉淀法合成了系列铝掺杂氧化锌粉体Zn1-xAlxO(0≤x≤0.028).通过ICP-OES方法测得样品中的Al含量,并利用Rietveld方法对分别在1000和1200℃下煅烧获得的铝掺杂氧化锌Zn1-xAlxO(0≤x≤0.028)进行了结构分析.结果发现Zn1-xAlxO的晶胞参数a,c开始随铝掺杂浓度的提高明显减小,随后这种影响趋势逐渐降低,甚至随Al离子浓度进一步增加晶胞参数逐渐增大,由此确定铝在氧化锌中的固溶度,摩尔分数为2.2%,当铝掺杂过量时,铝更倾向于与氧化锌形成ZnAl2O4尖晶石化合物而不是取代Zn2+位置形成固溶体.研究还发现铝掺杂氧化锌的UV-Vis吸收光谱较纯氧化锌样品产生了明显的红移现象,这进一步确认了铝离子确实进入了氧化锌晶格形成了固溶体.
A series of aluminum-doped zinc oxide powders Zn1-xAlxO (0≤x≤0.028) were synthesized by co-precipitation method.The Al content in the samples was measured by ICP-OES method and the Rare- The structural analysis of Zn1-xAlxO (0≤x≤0.028) obtained by calcination showed that the unit cell parameters a and c of Zn1-xAlxO began to decrease with the increase of aluminum doping concentration, The influence trend is gradually decreased, even with the further increase of the Al ion concentration, the unit cell parameters are gradually increased, thus the solid solubility of aluminum in the zinc oxide is determined, and the mole fraction is 2.2%. When the aluminum is doped in excess, Zinc oxide forms a ZnAl2O4 spinel rather than replacing the Zn2 + sites to form a solid solution. The study also found that the UV-Vis absorption spectra of Al-doped zinc oxide produced a significant redshift over pure zinc oxide samples, confirming that aluminum ions are indeed Enter the lattice of zinc oxide to form a solid solution.