Effect of Ammonia on CeO2 Microspheres Prepared by Internal Gelation Process

Xue Qiang Ding; Jing Tao Ma; Xing Yu Zhao; Shao Chang Hao; Chang Sheng Deng; Guan Xing Li

doi:10.4028/www.scientific.net/SSP.281.9

Paper Titles

Preface

Influence of Sulfate Ion on Phase and Dispersion of Y₃Al₅O₁₂ Nanopowders with the Co-Crystallization Method
p.3

Effect of Ammonia on CeO₂ Microspheres Prepared by Internal Gelation Process
p.9

Research on the Densification Process of the Mechanically-Alloyed Amorphous 2Si-B-3C-N Powder
p.15

Preparation and Characterization of SiC Nanoparticles for ATF-FCM
p.22

Fabrication and Characterization of Li₄SiO₄ Ceramic Pebbles Doped with Y₂O₃and Nb₂O₅
p.28

Oxidation Behavior of β-Sialon Ultrafine Powders Prepared by the Combined Sol-Gel and Microwave Carbothermal Reduction Nitridation Method
p.34

Effect of the Synthesis Method on the Properties of Ultrafine YAG Powder
p.40

Effect of Synthetic Technology on the Properties of Co₂O₃ Powder
p.46

HomeSolid State PhenomenaSolid State Phenomena Vol. 281Effect of Ammonia on CeO2 Microspheres Prepared by...

Effect of Ammonia on CeO₂ Microspheres Prepared by Internal Gelation Process

Abstract:

The internal gelation process was used to prepare cerium dioxide microspheres. The effect of ammonia on the stability of the precursor solutions was investigated with the NH₃∙H₂O/Ce (NH₄)₂(NO₃)₆ molar ratio from 0 to 1.25. The surface morphology and microstructure of the sintered CeO₂ microspheres were analyzed. With the increase of NH₃∙H₂O/Ce (NH₄)₂(NO₃)₆ molar ratio, the solutions became more unstable, which indicated that their gelation was initiated. When the NH₃∙H₂O/Ce (NH₄)₂(NO₃)₆ ratio varied from 0 to 0.75, the surface of the microspheres became rougher and grain size became larger. Further increase in the NH₃∙H₂O/Ce (NH₄)₂(NO₃)₆ ratios to 1 and 1.25 led to CeO₂ microspheres with smooth surface and compact structure.

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Solid State Phenomena (Volume 281)

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9-14

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https://doi.org/10.4028/www.scientific.net/SSP.281.9

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Online since:

August 2018

Authors:

Xue Qiang Ding, Jing Tao Ma*, Xing Yu Zhao, Shao Chang Hao, Chang Sheng Deng, Guan Xing Li

Keywords:

Ammonia, Cerium Dioxide Microspheres, Internal Gelation Process

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