Combustion synthesis of fine-particle ceria

摘要: Fine-particle ceria having narrow size distribution is of interest as polishing material for ophthalmological lenses, television tubes, plates and mirrors [1]. The preparation has been reported such by the hydrolysis cerium isopropoxide [2] nitrate [3, 4] followed thermal decomposition, well decomposition oxalate hydrazinate [5] hydrazine carboxylate [6]. In this letter we report fine-particle, large-surface-area combustion process developed $\alpha$-alumina [7], aluminates [8], chromites [9] ferrites [10]. involves rapid a saturated aqueous solution containing ceric ammonium urea $(CH_4N_20)$, carbohydrazide $(CH_6N_4O (CH))$, oxalyl dihydrazide $(C_2H_{16}N_4O_2 (ODH))$ or tetraformal trisazine $(C_4H_{16}N_6O_2 (TFTA))$ redox mixtures.