固相反应法制备硼酸铝钇微粉

SYNTHESIS OF YTTRIUM ALUMINUM BORATE MICROMETER POWDER BY THE SOLID-STATE REACTION METHOD

以氧化铝(Al2O3)、氧化钇(Y2O3)和氧化硼(B2O3)为原料,用固相反应合成法制备硼酸铝钇[YAl3(BO3)4,YAB]粉体。用X射线衍射分析、热重-差热分析和扫描电镜等手段分析YAB的组成和结构。对YAB前驱体在不同温度下进行灼烧,确定了在1200℃保温3h的最佳合成条件。结果表明:固相反应过程中,首先形成中间相硼酸钇(YBO3)和硼酸铝(Al18B4O33),最终形成单相的三方晶体YAB。晶粒尺寸比较均匀,平均粒径为0.5～1μm。

Yttrium aluminum borate [YAl3（BO3）4,YAB] powders were synthesized by the solid-state reaction method using Al2O3,Y2O3 and B2O3 as starting materials. The composition and phase structure of the as-prepared powder were analyzed and characterized by thermogravimetry-differential thermal analysis, X-ray diffraction and scanning electron microscope. The optimum synthesis conditions were confirmed from the products generated from the YAB precursor at different temperatures, with the temperature at 1 200 ℃ for 3 h. The results show that at the intermediate phase, yttrium borate （YBO3） and aluminum borate （Al18B4O33）, are first generated, and finally single-phase YAB with a trigonal structure is produced. The as-prepared powder consists of relatively homogeneous particles with an average diameter of 0.5-1 μm.