煅烧温度对球磨-煅烧制备Bi(Fe0.9Mn0.1)O3粉末性能的影响

Effect of calcining temperature on the characterization of Bi(Fe0.9Mn0.1)O3 powder prepared by ball-milling-calcining

本文以碳酸锰MnCO3和次碳酸铁铋BiFexCO3为原料,通过湿法球磨与煅烧制备Bi(Fe0.9Mn0.1)O3粉体颗粒,研究煅烧温度对其性能的影响。结果表明:前驱体中含有MnCO3和BiFexCO3两种成分,前驱体的煅烧温度可设定为455~820℃。试样的微观形貌与团聚形态受煅烧温度的显著影响。温度达到700℃时,类球形与多面体颗粒共同存在,粒径为120~280 nm。各试样具有相近的背景衬度,没有形成明暗差异显著的不同区域,说明锰与铋形成了均匀分布状态。600~800℃温度区间内煅烧形成的产物对所有波段都具有很高的近红外反射率,尤其当温度升高到700℃后,试样具备优异的反射性能。

The MnCO3 carbonate and ferro bismuth BiFexCO3 subcarbonate were selected as raw materials,Bi(Fe0.9Mn0.1)O3 powder particles were prepared by wet ball grinding and calcining,and the influence of calcining temperature on its performance was studied. The results show that the precursor contains MnCO3 and BiFexCO3,and the calcining temperature of the precursor is set between 455-820 ℃. The microstructure and agglomeration morphology of samples are significantly affected by the calcination temperature. When the temperature reaches 700 ℃,spherical and polyhedral particles with particle sizes between 120-280 nm are formed. All samples have similar background contrast,and there are no different regions with significant difference in light and shade,indicating the uniform distribution of the manganese and bismuth form. The products formed by calcination at 600-800 ℃ have high near-infrared reflectivity for all bands,especially when the temperature rises to 700 ℃,they have excellent reflection performance.