【摘要】 以碳酸钠和硝酸锌为原料,采用高温煅烧热分解工艺制备纳米氧化锌。探讨了不同煅烧温度对产物比表面积的影响,研究了不同煅烧温度的氧化锌晶粒生长规律。通过分析氧化锌纯度和考察产物的微观结构,确定了符合GB/T19589-2004的3类纳米氧化锌最佳煅烧温度。研究表明,煅烧温度由300℃升高到700℃,可得到17.2~71.3 m~2/g的特定比表面积纳米氧化锌,氧化锌的含量由92.5%升高到98.9%,平均晶粒尺寸与煅烧温度的生长关系符合三次多项式关系。尤其是当煅烧温度为400℃时,可得到比表面积大于60m~2/g、粒径约为15~25 nm、类球状的纳米氧化锌。更多还原

【Abstract】 Zinc oxide nanoparticles were prepared by process of thermal decomposition using zinc nitrate and sodium carbonate as raw materials.The influence of different calcination temperatures on surface area of the product was discussed.The growth regulation of Zn O nanoparticle at different calcination temperatures was investigated.The optimum calcining temperature was determined by analyzing purity and microstructure of three kinds of zinc oxide in accordance with GB/T19589-2004.It was found that the zinc oxide with specific surface area in range of 17.2 m~2/g to 71.3 m~2/g and content of Zn O from 92.5% to 98.9%,was obtained at calcination temperature from 300℃ to 700℃;There was a cubic polynomial function relationship between average grain size of zinc oxide and calcining temperature;Zinc oxide with specific surface above 60 m~2/g and size of 15~25 nm can be prepared at calcining temperature of 400℃.更多还原