摘要
以廉价无机盐为原料,采用溶胶凝胶法制备出尺度均匀,一次颗粒尺寸平均为60nm,颗粒呈球形的高纯Y2O3纳米微粒。研究发现适量SO42-离子的添加对生成前驱物溶胶及煅烧得到球形的Y2O3纳米微粒起关键作用。对前驱物在煅烧过程中的物相变化进行了研究,分析了煅烧温度对产物粒度和纯度的影响,结果表明在不使生成物颗粒过分长大的前提下,升高煅烧温度有助于制取高纯和晶化完全的Y2O3微粉。
Starting from the inexpensive inorganic salts, pure yttria nanopowders were prepared by solgel method. The primary particles are spherical and are measured tobe 60 nm in diameter with a narrow size distribution. Moderate sulfate ions used as an additive played an important role during preparation of precursor sol and calcination of precursor. Transformations were studied during the calcination of precursor. The influence of calcination temperature on size and purity of production was analyzed. Results show that higher calcination temperature is beneficial to preparing pure and complete crystallization yttria powders under the condition of not making production particles excessively grow.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第1期15-18,共4页
Journal of the Chinese Society of Rare Earths
基金
山东省优秀中青年科学家科研奖励基金资助项目(02BS049)
