Agitator dependent homogeneity enhancement of co-precipitation reaction for improving the dispersibility of precursors and Y2O3 powders. Issue 18 (15th December 2017)

• Record Type: Journal Article
• Authors: Jiang, Zhigang; Zhang, Le; Yao, Qing; Wei, Shuai; Zhou, Tianyuan; Ben, Yue; Sun, Rong; Huang, Guocan; Chen, Hao; Wang, Yun
• Is Part Of: Ceramics international. Volume 43:Issue 18(2017)
• Page Start: 16121
• Page End: 16127
• Publication Date: 2017-12-15
• Subjects: Agitator -- Dispersibility -- Y2O3 powder -- ANSYS CFX -- Flow pattern; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.08.178
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Y2 O3 powders were synthesized by adopting four different agitators during co-precipitation. The effect of the homogeneity of co-precipitation reaction process under different agitators on the phase compositions and morphology of precursors and Y2 O3 powders were studied. Crystalline phase precursors were prepared from the 2-straight-blade turbine impeller and the 4-straight-blade turbine impeller, identified as (NH4 )a Y(OH)b (CO3 )c ·H2 O. However, amorphous phase of Y(CO3 )(OH)·nH2 O (n = 1–1.5) were found from the 3-blade propeller type impeller and the 4-pitched-blade turbine impeller. The results showed that a better uniform mixture without layered and local circulations could be produced by the 4-pitched-blade turbine impeller. The prepared Y2 O3 powders exhibited a high dispersibility, weak agglomeration and less sintering neck. This study was the first attempt to improve the co-precipitation reaction homogeneity to enhance the dispersion of powders, which was benefit to the controllable and repeatable synthesis of Y2 O3 powders.