A NEW CHEMICAL ROUTE FOR THE PREPARATION OF FINE FERRITE POWDERS

被引：35
作者：
PRAMANIK, P
PATHAK, A
机构：
[1] Department of Chemistry, Indian Institute of Technology, Kharagpur
来源：
BULLETIN OF MATERIALS SCIENCE | 1994年 / 17卷 / 06期
关键词：
FERRITES; CHEMICAL SYNTHESIS ROUTE; POLYVINYL ALCOHOL; UREA; EVAPORATION; FINE PARTICLE; POWDERS;
D O I：
10.1007/BF02757573
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Precursors to MFe(2)O(4) [spinels ferrites; where M=Ni(II), Co(II) and Zn(II)] have been prepared by the evaporation of polyvinyl alcohol added mixed metal nitrate solution, in presence and absence of urea. The precursor materials have low ignition temperature and are spontaneously combustible at low temperatures (250 degrees C to 400 degrees C). The heat liberated through the process is sufficient for the crystallization of the desired ferrite phase. The urea added process resulted in finer, superparamagnetic particles (12-17 nm) compared to the process without urea (particle size 25-30 nm). The ultrafine ferrite powders obtained have been characterized by X-ray powder diffraction (XRD), thermal gravimetry (TC), differential scanning calorimetry (DSC), infrared spectroscopy (IR), transmission electron microscopy (TEM) and room temperature magnetic measurement studies.
引用
收藏
页码：967 / 975
页数：9
相关论文
共 15 条
[1]  
ANDERTON DJ, 1979, POWDER METALL, V1, P8
[2]  
DAS BK, 1981, PREPARATION CHARACTE
[3]  
DAS BK, 1981, DEV PREPARATION SOFT, P75
[4]  
DELAU JGM, 1970, CERAM B, V49, P572
[5]  
DISHLICH H, 1971, ANGEW CHEM INT EDIT, V12, P367
[6]   INFRARED ABSORPTION SPECTRA OF FERRITES [J].
GRIMES, NW ;
COLLETT, AJ .
NATURE-PHYSICAL SCIENCE, 1971, 230 (15) :158-&
[7]  
KLUNG HP, 1974, XRAY DIFFRACTION STU
[8]  
LEECH CA, 1975, CAMPBELL CATLAYSTS C, P161
[9]   PREPARATION OF HIGHLY DISPERSED MIXED OXIDES AND OXIDE SOLID SOLUTIONS BY PYROLYSIS OF AMORPHOUS ORGANIC PRECURSORS [J].
MARCILLY, C ;
COURTY, P ;
DELMON, B .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1970, 53 (01) :56-&
[10]   SYNTHESIS AND CHARACTERIZATION OF ULTRAFINE COBALT FERRITES [J].
PANNAPARAYIL, T ;
KOMARNENI, S .
IEEE TRANSACTIONS ON MAGNETICS, 1989, 25 (05) :4233-4235
12