A novel hydrothermal synthesis method for barium ferrite--颗粒学报PARTICUOLOGY

Li, K., Gu, H., & Wei, Q. (2004). A novel hydrothermal synthesis method for barium ferrite. China Particuology, 2(1), 41-43. https://doi.org/10.1016/S1672-2515(07)60019-0

A novel hydrothermal synthesis method for barium ferrite

Kang Li, Hongchen Gu ^*, Qun Wei

Engineering Research Center of Nano Science and Technology, Shanghai Jiaotong University, Shanghai 200030, P. R. China

10.1016/S1672-2515(07)60019-0

Volume 2, Issue 1, February 2004, Pages 41-43

Received 15 August 2003, Accepted 15 October 2003, Available online 27 November 2007.

E-mail: hcgu@mail.edu.cn

Highlights

Abstract

In the present work, fine barium ferrite powder has been synthesized through a one-step hydrothermal process in an autoclave at [OH⁻]/[Cl⁻] ratio of 2:1 in the temperature range from 180 to 260 °C using barium chloride (BaCl₂), ferrous chloride (FeCl₂) and potassium nitrate (KNO₃) as the starting materials. Both particle size and saturation magnetization (M_s) increase with increasing hydrothermal reaction temperature, while the intrinsic coercivity (_iHc) peaks at 685 Oe at 230 °C. Morphology progress from the barium ferrite precursor particles to the barium hexaferrite particles has been monitored with increasing hydrothermal reaction time at 230 °C in the autoclave.

Graphical abstract

Keywords

barium hexaferrite; hydrothermal reaction; magnetic recording nanoparticles

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