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Surfactant assisted in situ co-precipitation method for preparing core-shell structure nano powder
The invention discloses a surfactant assisted in situ co-precipitation method for preparing a core-shell structure nano powder. The preparation process is as follows: weighing nitrate of strontium, barium and magnesium according to the precise stoichiometric ratio, and dissolving the three in water to prepare a solution A; weighing butyl titanate according to precise stoichiometric ratio and dissolving the butyl titanate in an ethanol-oxalic acid solution to prepare a solution B; weighing a certain amount of a surfactant and dissolving the surfactant in hot water-alcohol to prepare a solution C; slowly dropwise adding ammonia into a mixed solution of A, B and C for a co-precipitation reaction; controlling the pH value of the reaction system at 2; and subjecting the precipitate to filtering, washing, heat treatment and grinding to obtain a Ba1-nSrnTiO3 @ MgO core-shell structure nano powder with high degree of crystallinity. The invention has the advantages of simple preparation process, short cycle and low cost, and the obtained nano composite powder has good dispersibility, uniform particle size, high degree of crystallinity and coating structure, so as to meet the purpose of practicality.
Surfactant assisted in situ co-precipitation method for preparing core-shell structure nano powder
The invention discloses a surfactant assisted in situ co-precipitation method for preparing a core-shell structure nano powder. The preparation process is as follows: weighing nitrate of strontium, barium and magnesium according to the precise stoichiometric ratio, and dissolving the three in water to prepare a solution A; weighing butyl titanate according to precise stoichiometric ratio and dissolving the butyl titanate in an ethanol-oxalic acid solution to prepare a solution B; weighing a certain amount of a surfactant and dissolving the surfactant in hot water-alcohol to prepare a solution C; slowly dropwise adding ammonia into a mixed solution of A, B and C for a co-precipitation reaction; controlling the pH value of the reaction system at 2; and subjecting the precipitate to filtering, washing, heat treatment and grinding to obtain a Ba1-nSrnTiO3 @ MgO core-shell structure nano powder with high degree of crystallinity. The invention has the advantages of simple preparation process, short cycle and low cost, and the obtained nano composite powder has good dispersibility, uniform particle size, high degree of crystallinity and coating structure, so as to meet the purpose of practicality.
Surfactant assisted in situ co-precipitation method for preparing core-shell structure nano powder
ZHANG JINGJI (author) / WANG JIANGYING (author) / JI LUDONG (author) / GAO YAFENG (author) / CHEN HANGYU (author) / LI HANQI (author) / HUANG ZHIYUAN (author)
2015-04-08
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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