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)

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)

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)

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)

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)

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)

Synthesis of Rice-Husk-Carbon-Supported Nickel Ferrite Catalyst for Reduction of Nitrophenols., Han, Fengyan, Xu Xusheng, Fu Yongsheng, and Wang Xin , J Nanosci Nanotechnol, 2019 Sep 01, Volume 19, Issue 9, p.5838-5846, (2019)

Rapid removal of acesulfame potassium by acid-activated ferrate(VI) under mild alkaline conditions., Ghosh, Malini, Manoli Kyriakos, Renaud Justin B., Sabourin Lyne, Nakhla George, Sharma Virender K., and Ray Ajay K. , Chemosphere, 2019 Sep, Volume 230, p.416-423, (2019)

Magnetically retrievable ferrite nanoparticles in the catalysis application., Amiri, Mahnaz, Eskandari Khalil, and Salavati-Niasari Masoud , Adv Colloid Interface Sci, 2019 Sep, Volume 271, p.101982, (2019)

Heterogeneous sonocatalytic degradation of an anionic dye in aqueous solution using a magnetic lanthanum dioxide carbonate-doped zinc ferrite-reduced graphene oxide nanostructure., Han, Jonghun, Jun Byung-Moon, Heo Jiyong, Kim Sewoon, Yoon Yeomin, and Park Chang Min , Ecotoxicol Environ Saf, 2019 Oct 30, Volume 182, p.109396, (2019)

Impact of sonochemical synthesis condition on the structural and physical properties of MnFeO spinel ferrite nanoparticles., Yadav, Raghvendra Singh, Kuřitka Ivo, Vilčáková Jarmila, Jamatia Thaiskang, Machovský Michal, Škoda David, Urbánek Pavel, Masař Milan, Urbánek Michal, Kalina Lukáš, et al. , Ultrason Sonochem, 2019 Oct 23, Volume 61, p.104839, (2019)

In situ construction of yolk-shell zinc ferrite with carbon and nitrogen co-doping for highly efficient solar light harvesting and improved catalytic performance., Li, Jianan, Li Xinyong, Chen Xin, Yin Zhifan, Li Yaxuan, and Jiang Xuchuan , J Colloid Interface Sci, 2019 Oct 15, Volume 554, p.91-102, (2019)

Quantitative evaluation of the thallium binding of soluble and insoluble Prussian blue hexacyanoferrate analogs: A scientific comparison based on their critical quality attributes., Faustino, Patrick J., Brown Andrew, Lowry Bryan, Yang Yongsheng, Wang Yifan, Khan Mansoor A., Dunbar Kim R., and Mohammad Adil , Int J Pharm, 2019 Oct 05, Volume 569, p.118600, (2019)