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Characterization of Mn–Zn Ferrite Prepared by a Hydrothermal Process From Used Dry Batteries and Waste Steel Pickling Liquor
Author(s) -
Liu ChungWen,
Lin ChengHsiung,
Fu YenPei
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01902.x
Subject(s) - pickling , materials science , ferrite (magnet) , metallurgy , raw material , ferrous , hydrothermal circulation , manganese , chemical engineering , composite material , chemistry , organic chemistry , engineering
In this study, we propose a process to prepare Mn–Zn ferrite powder, using oxides of manganese and zinc extracted from used dry batteries, and ferrous chloride solution from waste steel pickling liquor. The hydrothermal process was used to convert the starting raw materials into Mn–Zn ferrite powder. This powder revealed the formation of cubic ferrite with a saturation magnetization ( M s ) of 58.8 emu/g and an intrinsic coercive force ( H c ) of 3.8 Oe. The average lattice thermal expansion coefficient α a (200°–500°C) of this Mn–Zn ferrite powder was 14.14 × 10 −6 K −1 . The toroidal specimen sintered at 1300°C in a controlled oxygen atmosphere presented a flat profile of initial permeability (μ i ) of 2150–2200, in the frequency range 0.1–20 kHz, which allows its use in magnetic applications. This useful technology, combined with environment and materials engineering, can promote the recycling of dry batteries and contribute to the preservation of the earth. Moreover, this technology can also decrease the cost of disposal of the used dried batteries and waste steel pickling liquor.