| Effect of additive on synthesis of MnZn ferrite nanocrystal by hydrothermal crystallization |
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| 作者姓名： | SANG Shng-bin |
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| 作者单位： | CollegeofChemistryandChemicalEngineeringCentralSouthUniversity，CollegeofChemistryandChemicalEngineeringCentralSouthUniversity，CollegeofChemistryandChemicalEngineeringCentralSouthUniversity Changsha410083，China，Changsha410083，China，Changsha410083，China |
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| 摘 要： | 1 ＩＮＴＲＯＤＲＣＴＩＯＮＷｉｔｈｒｅｇａｒｄｔｏｔｈｅｓｔｕｄｙｏｆｃｒｙｓｔａｌｇｒｏｗｔｈｕｎｉｔｓ,ｒｅｓｅａｒｃｈｅｒｓｍａｉｎｌｙｃｏｎｃｅｎｔｒａｔｅｏｎｔｈｅｄｉｓｓｏｌｕｔｉｏｎｏｆｓｏｌｕｔｅ ,ｔｈｅｆｏｒｍａｔｉｏｎｏｆｇｒｏｗｔｈｕｎｉｔｓａｎｄｔｈｅｔｒａｎｓｐｏｒｔａｔｉｏｎｏｆｔｈｅｃｒｙｓｔａｌｇｒｏｗｔｈｕｎｉｔｔｏｔｈｅｉｎｔｅｒｆａｃｅ ,ａｓｗｅｌｌａｓｔｈｅｃｏｎｇｒｕｅｎｃｙｏｆｔｈｅｇｒｏｗｔｈｕｎｉｔｓｏｎｔｈｅｉｎｔｅｒ ｆａｃｅｓｏｆｔｈｅｃｒｙ…
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| 收稿时间： | 16 May 2002 |
Effect of additive on synthesis of MnZn ferrite nanocrystal by hydrothermal crystallization |
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| Sang Shang-bin , Gu Ying-ying and Huang Ke-long.Effect of additive on synthesis of MnZn ferrite nanocrystal by hydrothermal crystallization[J].Journal of Central South University of Technology,2003,10(1):38-43. |
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| Authors: | Sang Shang-bin Gu Ying-ying and Huang Ke-long |
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| Affiliation: | (1) College of Chemistry and Chemical Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | The effect of additive RCOONa on the formation of MnZn ferrite homogeneous coprecipitation precursor was studied in this paper.
The action of additive in the MnZn ferrite hydrothermal crystallization process was investigated according to crystal field
theory and crystal growth unit theory. And the growth unit formation process was presented and its structure was illustrated.
The results show that the precursor of MnZn ferrite is a colloidal mixture composed of Zn(OH)2, Fe(OH)2, Mn(OH)2, MnO(OH), MnO2·xH2O and so on, and dissolves in solution in the form of hydroxyl coordination tetrahedron and octahedron such as Zn(OH)
4
2−
, Fe(OH)
4
2−
, Fe(OH)
6
4−
, Fe(OH)
4
−
, Fe(OH)
5
3−
, Mn(OH)
4
2−
, Mn(OH)
6
3−
etc., and the growth unit is formed by combination of the coordination polyhedra subsequently in the hydrothermal precess.
The additive is beneficial to the formation of homogeneous precursor and has dispersive effect on the aggregation of the crystal
growth unit by forming associate with hydrogen bond, which is beneficial to the synthesis of the pure product with a tiny
size and a narrow size distribution.
Biography of the first author: SANG Shang-bin, doctoral student, born in July 1969, majoring in functional materials and nano-materials. |
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| Keywords: | MnZn ferrite nanocrystal growth unit hydrothermal process mechanism additive |
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