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一种液相合成LaxSr1-xCoO3-δ复合氧化物的方法
本发明属于半导体材料技术领域，具体公开了一种液相合成LaxSr1‑xCoO3‑δ复合氧化物的方法，先将La(NO3)3·6H2O、Sr(NO3)2、Co(NO3)2·6H2O溶于水中，形成溶液1；将H2C2O4溶于水中，形成溶液2；将溶液1加入溶液2中，搅拌，然后调节pH直至完全沉淀为止；然后将形成的沉淀混合液倒入水热釜中，进行水热反应后保温；自然冷却后，取出、烘干，得到前驱体；最后将前驱体焙烧后分解，制备得到LaxSr1‑xCoO3‑δ复合氧化物。本方法在分步沉淀后采用水热预处理，可更好地将原料混和均匀，避免采用高温焙烧，同时得到较高含量的复合氧化物，解决了传统液相沉淀法中沉淀平衡常数有差异，造成沉淀不完全，不能够生成设计化学计量比的复合氧化物材料的问题。
The invention belongs to the technical field of semiconductor materials, and particularly discloses a method for liquid-phase synthesis of a LaxSr1-xCoO3-delta composite oxide, which comprises the following steps: dissolving La(NO3)3.6H2O, Sr(NO3)2 and Co(NO3) 2.6H2O in water to form a solution 1; dissolving H2C2O4 in water to form a solution 2; adding the solution 1 into the solution 2, stirring,and then adjusting the pH value until complete precipitation; then pouring the formed precipitate mixed solution into a hydrothermal kettle, carrying out a hydrothermal reaction, and then carrying out heat preservation; naturally cooling, taking out, and drying to obtain a precursor; finally, roasting the precursor and then decomposing, and preparing the LaxSr1-xCoO3-delta composite oxide. According to the method, hydrothermal pretreatment is adopted after step-by-step precipitation, so that the raw materials can be better mixed uniformly, high-temperature roasting is avoided, meanwhile, thecomposite oxide with relatively high content is obtained, and the problems of incomplete precipitation and incapability of generating a composite oxide material with a designed stoichiometric ratio due to difference of precipitation equilibrium constants in a traditional liquid phase precipitation method are solved.
一种液相合成LaxSr1-xCoO3-δ复合氧化物的方法
本发明属于半导体材料技术领域，具体公开了一种液相合成LaxSr1‑xCoO3‑δ复合氧化物的方法，先将La(NO3)3·6H2O、Sr(NO3)2、Co(NO3)2·6H2O溶于水中，形成溶液1；将H2C2O4溶于水中，形成溶液2；将溶液1加入溶液2中，搅拌，然后调节pH直至完全沉淀为止；然后将形成的沉淀混合液倒入水热釜中，进行水热反应后保温；自然冷却后，取出、烘干，得到前驱体；最后将前驱体焙烧后分解，制备得到LaxSr1‑xCoO3‑δ复合氧化物。本方法在分步沉淀后采用水热预处理，可更好地将原料混和均匀，避免采用高温焙烧，同时得到较高含量的复合氧化物，解决了传统液相沉淀法中沉淀平衡常数有差异，造成沉淀不完全，不能够生成设计化学计量比的复合氧化物材料的问题。
The invention belongs to the technical field of semiconductor materials, and particularly discloses a method for liquid-phase synthesis of a LaxSr1-xCoO3-delta composite oxide, which comprises the following steps: dissolving La(NO3)3.6H2O, Sr(NO3)2 and Co(NO3) 2.6H2O in water to form a solution 1; dissolving H2C2O4 in water to form a solution 2; adding the solution 1 into the solution 2, stirring,and then adjusting the pH value until complete precipitation; then pouring the formed precipitate mixed solution into a hydrothermal kettle, carrying out a hydrothermal reaction, and then carrying out heat preservation; naturally cooling, taking out, and drying to obtain a precursor; finally, roasting the precursor and then decomposing, and preparing the LaxSr1-xCoO3-delta composite oxide. According to the method, hydrothermal pretreatment is adopted after step-by-step precipitation, so that the raw materials can be better mixed uniformly, high-temperature roasting is avoided, meanwhile, thecomposite oxide with relatively high content is obtained, and the problems of incomplete precipitation and incapability of generating a composite oxide material with a designed stoichiometric ratio due to difference of precipitation equilibrium constants in a traditional liquid phase precipitation method are solved.
一种液相合成LaxSr1-xCoO3-δ复合氧化物的方法
21.06.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C01G
Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle
,
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
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