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Synthesis and magnetic properties of La3+-Co2+ substituted strontium ferrite particles using modified spray pyrolysis-calcination method

Title
Synthesis and magnetic properties of La3+-Co2+ substituted strontium ferrite particles using modified spray pyrolysis-calcination method
Author
김종렬
Keywords
Powders: solid state reaction; Magnetic properties; Hard magnets; Transition metal oxide; HIGH COERCIVITY; HEXAFERRITE; LA; SRFE12O19; MOSSBAUER; MICROSTRUCTURE; ND
Issue Date
2017-03
Publisher
ELSEVIER SCI LTD
Citation
CERAMICS INTERNATIONAL, v. 43, No. 4, Page. 3879-3884
Abstract
The purpose of the research was to improve the intrinsic magnetic properties of strontium ferrite by substituting lanthanum and cobalt for strontium and iron. The salt-assisted ultrasonic spray pyrolysis (SA-USP) following calcination process were used to from La-Co substituted strontium ferrite particles (LaxSr1-xFe12-yCoyO19), and their compositional dependent magnetic properties systemically investigated. All the samples were calcined at 1050°C for 1h in an air atmosphere to yield single-phased hexagonal particles several hundred nanometers to microns in size. A saturation magnetization of 70.76emu/g and a coercivity 7265Oe were obtained at a composition of La0.25Sr0.75Fe11.75Co0.25O19. The amount of Co was reduced to obtain an optimized saturation magnetization of 71.40emu/g and a coercivity of 7572Oe at a composition of La0.25Sr0.75Fe11.8Co0.2O19.
URI
https://www.sciencedirect.com/science/article/pii/S027288421632301Xhttp://repository.hanyang.ac.kr/handle/20.500.11754/71863
ISSN
0272-8842; 1873-3956
DOI
10.1016/j.ceramint.2016.12.051
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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