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发明公开
CN105236492A 一锅沉淀法制备Ce0.85Sm0.15O1.925-Sm0.6Sr0.4FeO3-δ超细粉体 失效 - 权利终止

一锅沉淀法制备Ce0.85Sm0.15O1.925-Sm0.6Sr0.4FeO3-δ超细粉体
摘要：
本发明涉及一种一锅沉淀法制备Ce0.85Sm0.15O1.925-Sm0.6Sr0.4FeO3-δ超细粉体的方法，属于一种材料制备工艺。Ce0.85Sm0.15O1.925-Sm0.6Sr0.4FeO3-δ是一种混合导体透氧膜材料，在氧气分离、燃料电池及合成气体领域应用前景广阔。本发明按化学计量比配制CeCl3、SmCl3、SrCl2、和FeCl3的混合溶液并加热到60℃，加入PEG10000和冰乙酸，PEG10000溶解后，向混合溶液中加入Ce(NO3)4溶液，再加入碳酸氢铵溶液，当沉淀母液pH值达到7时，将沉淀体系加热煮沸，得到棕褐色的沉淀，沉淀经过滤、洗涤、干燥，900℃煅烧，得到分散性好、颗粒均匀、中位粒径D50为300～500nm、具有萤石相和钙钛矿相的75wt.％Ce0.85Sm0.15O1.925-25wt.％Sm0.6Sr0.4FeO3-δ超细粉体。
摘要（英）：

The present invention relates to a one-pot precipitation method for preparing Ce0.85Sm0.15O1.925-Sm0.6Sr0.4FeO3-delta ultrafine powder, and belongs to a material preparation technology. Ce0.85Sm0.15O1.925-Sm0.6Sr0.4FeO3-delta is a mixed conducting and oxygen permeable membrane material and has a wide application prospect in oxygen separation, fuel cells and synthetic gas field. A mixed solution of CeCl3, SmCl3, SrCl2, and FeCl3 is prepared according to a stoichiometric ratio and is heated to 60 DEG C, and PEG10000 and glacial acetic acids are added into the heated mixed solution. After the PEG10000 is dissolved, a Ce(NO3)4 solution is added into the mixed solution and then a bicarbonate ammonium solution is added into the mixed solution. When the pH value of the precipitated mother liquid reaches 7, the precipitation system is heated and boiled to obtain a tan precipitate. The precipitate is filtered, the filtered precipitate is washed and dried, and the dried precipitate is calcined at 900 DEG C to obtain a 75wt.% Ce0.85Sm0.15O1.925-25wt.% Sm0.6Sr0.4FeO3-delta ultrafine powder which is good in dispersion, is uniform in particles, has a median particle size (D50) of 300-500 nm, and has a fluorite phase and a perovskite phase.

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