Bottom-up and new compaction processes: A way to tunable properties of nanostructured cobalt ferrite ceramics

Magnetic and Impedance Properties of Nanocomposite CoFe2O4/Co0.7Fe0.3 and Single‐Phase CoFe2O4 Prepared Via a One‐Step Hydrothermal Synthesis

“…Sample A has the largest M s value; this may be because this sample has the highest content of CF, as CF is a strongly magnetic material with an M s of up to 211 emu/g . As shown in Fig.…”

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

“…Analogously, in the mixed relaxor ceramic Pb(Zn,Nb)O 3 -PbTiO 3 system, the ferroelectric to relaxor transition disappears for small crystallite sizes of 20 nm. [165] Magnetic nanostructured bulk cobalt-iron spinel, CoFe 2 O 4 , was successfully fabricated by Imine et al [166] with an average crystallite size of only 11 nm and a relative density of >92%, and superparamagnetic behavior was demonstrated for those samples. Magnetic nanostructured bulk Ni-Zn ferrites were synthesized by Valenzuela et al [167] Their samples had a relative density between 92 and 94% and an average crystallite size around 60 nm.…”

Severe reduction of Ni–Zn ferrites during consolidation by Spark Plasma Sintering (SPS)

“…A novel technique to consolidate powders made of NPs into high density solids is Spark Plasma Sintering (SPS) [4]. The SPS technique allows the consolidation of high density samples with very short times and significantly reduced sintering temperatures, with improved magnetic properties [5,6]. The SPS method can also be used for in situ solid state reactions [7], not only for the consolidation of powders.…”