Abstract
Ferroxplana type hexagonal ferrite with composition Ba2Co2Fe12O22 (Co2Y) was prepared by polymeric sol-gel method from the aqueous solution of their corresponding metal salts. All the samples were characterized by using X-ray diffraction and scanning electron microscopic technique. The formation and the microstructure of the Ba2Co2Fe12O22 was studied as a function of heat treatment temperature and it was observed that well defined hexagonal plate-like fine particles with particle sizes between 130 and 400 nm were formed at relatively lower temperature (900 °C) as compared to conventional solid state reaction method (1100 °C). Magnetic properties of the samples were also studied as a function of heat treatment temperature and it showed large saturation magnetization (Ms) ranging from 30.9 to 47.6 emu/g and a wide range of coercivity (130∼1566 Oe) depending on the heat treatment temperature. The very high saturation magnetization at relatively lower temperature (say 800 °C) arises due to the presence of several high magnetic impurities, such as BaFe12O19 and CoFe2O4. The saturation magnetization increases with increasing heat treatment temperature above 900 °C, while the coercivity showed a reversed order.
| Original language | English |
|---|---|
| Pages (from-to) | 2718-2722 |
| Number of pages | 5 |
| Journal | Materials Letters |
| Volume | 60 |
| Issue number | 21-22 |
| DOIs | |
| Publication status | Published - Sep 2006 |
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Keywords
- Hexagonal ferrite
- Magnetic properties
- Sol-gel synthesis
- X-ray diffraction
ASJC Scopus subject areas
- Materials Science(all)
Cite this
The effect of heat treatment temperature on the microstructure and magnetic properties of Ba2Co2Fe12O22 (Co2Y) prepared by sol-gel method. / Chand Pramanik, Nimai; Fujii, Tatsuo; Nakanishi, Makoto; Takada, Jun; Seok, Sang II.
In: Materials Letters, Vol. 60, No. 21-22, 09.2006, p. 2718-2722.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The effect of heat treatment temperature on the microstructure and magnetic properties of Ba2Co2Fe12O22 (Co2Y) prepared by sol-gel method
AU - Chand Pramanik, Nimai
AU - Fujii, Tatsuo
AU - Nakanishi, Makoto
AU - Takada, Jun
AU - Seok, Sang II
PY - 2006/9
Y1 - 2006/9
N2 - Ferroxplana type hexagonal ferrite with composition Ba2Co2Fe12O22 (Co2Y) was prepared by polymeric sol-gel method from the aqueous solution of their corresponding metal salts. All the samples were characterized by using X-ray diffraction and scanning electron microscopic technique. The formation and the microstructure of the Ba2Co2Fe12O22 was studied as a function of heat treatment temperature and it was observed that well defined hexagonal plate-like fine particles with particle sizes between 130 and 400 nm were formed at relatively lower temperature (900 °C) as compared to conventional solid state reaction method (1100 °C). Magnetic properties of the samples were also studied as a function of heat treatment temperature and it showed large saturation magnetization (Ms) ranging from 30.9 to 47.6 emu/g and a wide range of coercivity (130∼1566 Oe) depending on the heat treatment temperature. The very high saturation magnetization at relatively lower temperature (say 800 °C) arises due to the presence of several high magnetic impurities, such as BaFe12O19 and CoFe2O4. The saturation magnetization increases with increasing heat treatment temperature above 900 °C, while the coercivity showed a reversed order.
AB - Ferroxplana type hexagonal ferrite with composition Ba2Co2Fe12O22 (Co2Y) was prepared by polymeric sol-gel method from the aqueous solution of their corresponding metal salts. All the samples were characterized by using X-ray diffraction and scanning electron microscopic technique. The formation and the microstructure of the Ba2Co2Fe12O22 was studied as a function of heat treatment temperature and it was observed that well defined hexagonal plate-like fine particles with particle sizes between 130 and 400 nm were formed at relatively lower temperature (900 °C) as compared to conventional solid state reaction method (1100 °C). Magnetic properties of the samples were also studied as a function of heat treatment temperature and it showed large saturation magnetization (Ms) ranging from 30.9 to 47.6 emu/g and a wide range of coercivity (130∼1566 Oe) depending on the heat treatment temperature. The very high saturation magnetization at relatively lower temperature (say 800 °C) arises due to the presence of several high magnetic impurities, such as BaFe12O19 and CoFe2O4. The saturation magnetization increases with increasing heat treatment temperature above 900 °C, while the coercivity showed a reversed order.
KW - Hexagonal ferrite
KW - Magnetic properties
KW - Sol-gel synthesis
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=33745713386&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33745713386&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2006.01.077
DO - 10.1016/j.matlet.2006.01.077
M3 - Article
AN - SCOPUS:33745713386
VL - 60
SP - 2718
EP - 2722
JO - Materials Letters
JF - Materials Letters
SN - 0167-577X
IS - 21-22
ER -