The Journal of Physical Chemistry C 124(31) 16758-16762 2020年8月
The research and development of secondary batteries, such as the lithium-ion batteries, have been widely conducted. Most electrodes are of composite type and comprise an active material, a conductive additive, and a binder. To achieve a precise an...
Takayuki Konya   Yuji Shiramata   Tatsuya Nakamura   
BUNSEKI KAGAKU 68(10) 793-800 2019年10月
An electrochemical cell with a specifically designed X-ray window was fabricated in order to evaluate the structural evolution of the cathode material under the operating condition. It enabled us to obtain strong signals from a positive electrode ...
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 139(3) 279-285 1998年9月
Aluminum bearing magnetite particles were synthesized by aerial oxidation of alkaline suspensions containing both ferrous and aluminum ions. It was found that the mixing procedure was critical in the preparation of ferrite particles without the fo...
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 168(3) 285-291 1997年4月
The low-temperature sintering of Ni-Zn-Cu ferrite was investigated using the usual ceramic technique. We found that the post-sintering density and the permeability of the sintered ferrite are strongly affected by the size of the starting oxide pow...
JOURNAL OF APPLIED PHYSICS 79(9) 7129-7133 1996年5月
Mn-Zn ferrite ceramics were prepared through the ceramic method starting from metal oxides. The ceramics' microstructural and electromagnetic properties were then evaluated. It was found that sintering density and ferrite grain size depend on both...
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH 155(1) 207-213 1996年5月
The surface of acicular gamma-Fe2O3 particles was modified using a Co2+ containing aqueous suspension. Since octahedrally coordinated Co2+ ion in the spinel lattice produces strong magnetocrystalline anisotropy, the coercivity of the particles was...