About Ferrites

solid oxide fuel cell cathode and electrolyte cross section by SEM

Ferrites are iron oxide-based ceramic materials with magnetic properties, useful in many types of electronic devices and building materials. Ferrites are hard, brittle, generally gray or black, and typically have a crystal structure which has more than one type of site for the cations. Usually the magnetic moments of the metal ions on sites of one type are parallel to each other and anti-parallel to the moments on at least one site of another type. Ferrites are produced by sintering finely powdered precursor compounds in molds, milling the resulting material into a fine powder, and then re-sintering, with the second sintering round usually conducted in a magnetic field to ensure that the particles align properly.

Commercial ferrites can be classified as hard or soft.

Soft ferrites are used in transformer or electromagnetic cores. They have low coercivity and high resistivity, and contain iron, oxygen, zinc, or manganese.

Hard ferrites have high coercivity, and therefore are used as permanent magnets. Since ferrite permanent magnets are cheaper, and also weaker, than other available permanent magnets, they are frequently used in household products such as refrigerator magnets, and as mediums for magnetic recording. Strontium ferrite, barium ferrite, and Cobalt Ferritecobalt ferrite are all considered hard ferrites.

Recent Research & Development for Ferrites

The two-step neutralization ferrite-formation process for sustainable acid mine drainage treatment: Removal of copper, zinc and arsenic, and the influence of coexisting ions on ferritization., Igarashi, Toshifumi, Herrera Pepe Salgado, Uchiyama Hiroyuki, Miyamae Hiroko, Iyatomi Nobuyoshi, Hashimoto Koichi, and Tabelin Carlito Baltazar , Sci Total Environ, 2020 May 01, Volume 715, p.136877, (2020)

Nickel Ferrite (NiFe₂O₄) Nanoparticles as Magnetically Recyclable Nanocatalyst for Highly Efficient Synthesis of 4H-Chromene Derivatives., Pourshojaei, Yaghoub, Zolala Fatemeh, Eskandari Khalil, Talebi Mahshid, Morsali Laleh, Amiri Mahnaz, Khodadadi Arash, Shamsimeymandi Reza, Faghih-Mirzaei Ehsan, and Asadipour Ali , J Nanosci Nanotechnol, 2020 May 01, Volume 20, Issue 5, p.3206-3216, (2020)

Speciation of chromium in waters using dispersive micro-solid phase extraction with magnetic ferrite and graphite furnace atomic absorption spectrometry., López-García, Ignacio, Marín-Hernández Juan José, and Hernández-Córdoba Manuel , Sci Rep, 2020 Mar 24, Volume 10, Issue 1, p.5268, (2020)

3D Printing of ABS Barium Ferrite Composites., Hanemann, Thomas, Syperek Diana, and Nötzel Dorit , Materials (Basel), 2020 Mar 24, Volume 13, Issue 6, (2020)

Structural, optical and magnetic properties of Sm doped yttrium orthoferrite (YFeO) obtained by sol-gel synthesis route., Bharadwaj, P S. J., Kundu Swarup, Kollipara Vijay Sai, and Varma Kalidindi B. R. , J Phys Condens Matter, 2020 Jan 16, Volume 32, Issue 3, p.035810, (2020)

Coral-like hierarchical architecture self-assembled by cobalt hexacyanoferrate nanocrystals and N-doped carbon nanoplatelets as efficient electrocatalyst for oxygen evolution reaction., Zhang, Xiaojuan, Chen Yuanfu, Zhang Wanli, and Yang Dongxu , J Colloid Interface Sci, 2020 Jan 15, Volume 558, p.190-199, (2020)

Targeted conversion of Ni in electroplating sludge to nickel ferrite nanomaterial with stable lithium storage performance., Weng, Changzhou, Sun Xin, Han Bin, Ye Xucun, Zhong Zuqi, Li Wei, Liu Weizhen, Deng Hong, and Lin Zhang , J Hazard Mater, 2020 Feb 14, Volume 393, p.122296, (2020)

Spinel ferrite nanoparticles and nanocomposites for biomedical applications and their toxicity., Kefeni, Kebede K., Msagati Titus A. M., Nkambule Thabo Ti, and Mamba Bhekie B. , Mater Sci Eng C Mater Biol Appl, 2020 Feb, Volume 107, p.110314, (2020)

Enhanced solubilization and biochemical methane potential of waste activated sludge by combined free nitrous acid and potassium ferrate pretreatment., Wang, Jinsong, Zhang Zhaoji, Ye Xin, Pan Xiaofang, Lv Nan, Fang Hongda, and Chen Shaohua , Bioresour Technol, 2020 Feb, Volume 297, p.122376, (2020)

Chemical Synthesis of Rare Earth (La, Gd) Doped Cobalt Ferrite and a Comparative Analysis of Their Magnetic Properties., Gupta, Meenal, Das Anusree, Das Dipankar, Mohapatra Satyabrata, and Datta Anindya , J Nanosci Nanotechnol, 2020 Aug 01, Volume 20, Issue 8, p.5239-5245, (2020)

Toxicity evaluation of barium ferrite nanoparticles in bacteria, yeast and nematode., Alvino, Lilibette, Pacheco-Herrero Mar, López-Lorente Ángela I., Quiñones Zahíra, Cárdenas Soledad, and González-Sánchez Zaira Isabel , Chemosphere, 2020 Apr 16, Volume 254, p.126786, (2020)

Highly efficient removal of thallium(I) from wastewater via hypochlorite catalytic oxidation coupled with adsorption by hydrochar coated nickel ferrite composite., Li, Huosheng, Lin Mao, Xiao Tangfu, Long Jianyou, Liu Fengli, Li Yuting, Liu Yu, Liao Dandan, Chen Zexin, Zhang Ping, et al. , J Hazard Mater, 2020 Apr 15, Volume 388, p.122016, (2020)

Synthesis of niobium substituted cobalt-nickel nano-ferrite (CoNiNbFeO (x ≤ 0.1) by hydrothermal approach show strong anti-colon cancer activities., Tombuloglu, H, Khan F A., Almessiere M A., Aldakheel S, and Baykal A , J Biomol Struct Dyn, 2020 Apr 07, p.1-9, (2020)

Copper substituted zinc ferrite with abundant oxygen vacancies for enhanced ciprofloxacin degradation via peroxymonosulfate activation., Yu, Ruixin, Zhao Jianhui, Zhao Zhiwei, and Cui Fuyi , J Hazard Mater, 2020 05 15, Volume 390, p.121998, (2020)

Chemical Solution Deposition of Ordered 2D Arrays of Room-Temperature Ferrimagnetic Cobalt Ferrite Nanodots., Xu, Jin, Varghese Justin, Portale Giuseppe, Longo Alessandro, Momand Jamo, Syari'ati Ali, Heuver Jeroen A., Rudolf Petra, Kooi Bart J., Noheda Beatriz, et al. , Polymers (Basel), 2019 Sep 30, Volume 11, Issue 10, (2019)