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研究在不同络合体系(柠檬酸-乙二醇,甘氨酸-柠檬酸和EDTA-柠檬酸-乙二醇)以及不同的络合工艺条件下采用低温燃烧法制备了La0.8Ca0.1Sr0.1CrO3纳米粉体,并对其烧结性能进行探讨。结果表明:用EDTA-柠檬酸-乙二醇三元体系,使EDTA与Ca、Sr离子单独螯合,柠檬酸与La、Cr离子单独络合,然后再将溶液混合的络合工艺条件,低温燃烧得到纯相La0.8Ca0.1Sr0.1CrO3高活性纳米粉体;该粉体加入0.6%(质量分数)氟化钙作为烧结助剂,经1250℃得到相对密度为96.79%烧结体,比不加氟化钙的试样相对密度提高了3.15%。
In this paper, La0.8Ca0.1Sr0.1CrO3nanometer was prepared by low temperature combustion method under different complex conditions (citric acid-ethylene glycol, glycine-citric acid and EDTA-citric acid-ethylene glycol) and different complexation conditions Powder, and discuss its sintering performance. The results showed that EDTA-citric acid-ethylene glycol ternary system could chelate EDTA and Ca and Sr ions separately, citric acid and La and Cr ions could be complexed alone, and then the solution was mixed under the conditions of complexation process, The pure La0.8Ca0.1Sr0.1CrO3 high activity nano-powder is obtained by combustion; the calcium fluoride is added as 0.6% (mass fraction) calcium fluoride as a sintering aid to obtain a relative density of 96.79% sintered body at 1250 DEG C, The relative density of calcium fluoride samples increased by 3.15%.