Sintering of MnZn-ferrite powders prepared by hydrothermal reactions between oxides

被引:20
作者
Makovec, D [1 ]
Drofenik, M
Znidarsic, A
机构
[1] Jozef Stefan Inst, Dept Ceram, Ljubljana, Slovenia
[2] ISKRA Feriti, Ljubljana, Slovenia
关键词
ferrites; porosity; powders : chemical preparation; sintering; soft magnets;
D O I
10.1016/S0955-2219(01)00148-0
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The sintering of ferrite powders prepared by a hydrothermal treatment of starting oxides was studied in comparison with conventional pre-sintered powders. Two hydrothermal powders were prepared, one with a similar degree of conversion into spinel products as the pre-sintered powder but with a larger specific surface, and the other with a lower specific surface area and a high degree of conversion into MnZnFe2O4. In the first powder, non-homogeneity caused primarily by the agglomeration of the Mn-rich particles (Mn3O4 and ZnMn2O4) resulted in the formation of Kirkendall porosity, which significantly influenced the densification. process. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1945 / 1949
页数:5
相关论文
共 6 条
[1]  
EVANO PY, 1977, REACT SOLID, P433
[2]   Hydrothermal preparation of manganese zinc ferrites [J].
Lucke, R ;
Schlegel, E ;
Strienitz, R .
JOURNAL DE PHYSIQUE IV, 1997, 7 (C1) :63-64
[3]  
Makovec D, 1999, J AM CERAM SOC, V82, P1113, DOI 10.1111/j.1151-2916.1999.tb01884.x
[4]   Oxidation and reduction reactions in spinel oxides: Influence upon some physical properties [J].
Perriat, P ;
Gillot, B ;
Aymes, D .
JOURNAL DE PHYSIQUE IV, 1997, 7 (C1) :43-46
[5]  
STUIJTS AL, 1971, FERRITES, P108
[6]   EFFECTS OF PRESINTERING ON DENSIFICATION PHENOMENA OF FERRITES [J].
TOOLENAAR, FJCM .
SOLID STATE IONICS, 1985, 16 (1-4) :267-274