Synthesis and formation mechanism of monodisperse Mn-Co-Ni-O spinel nanocrystallines

Research progress of Co-based spinel oxide materials for direct methanol fuel cells

“…(4) Microemulsion synthesis: microemulsion synthesis refers to the method in which two kinds of insoluble solvents form a uniform microemulsion under the action of surfactants, and the final material is obtained through nucleation, coalescence, heat treatment and chemical precipitation of reactants in the droplet in the microbubble. [54][55][56] The product prepared by this method has the advantages of small size, large specific surface area and good particle dispersion. Gao et al 55…”

“…(4) Microemulsion synthesis: microemulsion synthesis refers to the method in which two kinds of insoluble solvents form a uniform microemulsion under the action of surfactants, and the final material is obtained through nucleation, coalescence, heat treatment and chemical precipitation of reactants in the droplet in the microbubble. 54–56 The product prepared by this method has the advantages of small size, large specific surface area and good particle dispersion. Gao et al 55 prepared Co (1− x ) Ni x Fe 2 (C 2 O 4 ) 3 precursors in the cetyl-trimethyl ammonium bromide (CTAB)/water/cyclohexane/ n -amyl alcohol microemulsion system with CTAB as the surfactant and CoSO 4 , NiSO 4 and FeSO 4 as raw materials.…”

Fast response and high stability Mn–Co–Ni–Al–O NTC microbeads thermistors

“…For example, Chen et al synthesized high performance Ni 0.9 Mn 1 . 8 Mg 0.3 O 4 and MCN spinel nanoceramic microbeads via inkjet printing with a thermal time constant of about 147 ms 10,11 . Besides, suitable room temperature (RT) resistivity and receivable stability are desirable properties for commercial NTC thermistors 12,13 .…”

“…For example, Chen et al synthesized high performance Ni 0.9 Mn 1 . 8 Mg 0.3 O 4 and MCN spinel nanoceramic microbeads via inkjet printing with a thermal time constant of about 147 ms. 10,11 Besides, suitable room temperature (RT) resistivity and receivable stability are desirable properties for commercial NTC thermistors. 12,13 Herein, Al-doped Mn 1.95x Co 0.21 Ni 0.84 Al x O 4 (MCNA) microbead thermistors were fabricated using in situ ink-jet printing, and the structure, microstructure, and electrical properties were systematically explored.…”