【摘要】：以硝酸鋅和碳酸氫銨為原料,采用熱分解堿式碳酸鋅工藝制備納米氧化鋅。通過煅燒產(chǎn)物的XRD分析,確定了前驅體最佳熱分解溫度,得出了煅燒溫度、時間與平均晶粒尺寸的關系。通過對不同煅燒溫度產(chǎn)物的透射電鏡微觀形貌觀察、分析,闡述了熱分解納米氧化鋅的形成機理。實驗結果表明,前驅體最佳熱分解溫度為200℃;在200~600℃的煅燒溫度下可形成晶粒尺寸為8.4~29.3 nm的納米氧化鋅;納米氧化鋅平均晶粒尺寸與煅燒溫度為指數(shù)函數(shù)關系,而與煅燒時間為冪函數(shù)關系;納米氧化鋅在熱分解過程中,首先形成納米孔,隨后孔和孔連通形成納米孔道,最后形成表面圓滑的棒狀納米氧化鋅。
[Abstract]:Nanometer zinc oxide was prepared by thermal decomposition of basic zinc carbonate from zinc nitrate and ammonium bicarbonate. Through the XRD analysis of calcined products, the optimum pyrolysis temperature of the precursor was determined, and the relationship between the calcination temperature, time and the average grain size was obtained. The mechanism of thermal decomposition of nanometer zinc oxide was described by observing the microstructure of calcined products at different calcination temperature by transmission electron microscope (TEM). The experimental results show that the optimum thermal decomposition temperature of the precursor is 200 鈩，

本文編號：2256388