Display options
Cite
Ishizaki T, Nakano H, Tajima S, et al. Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles. Nanomaterials (Basel). 2016;7(1)doi: 10.3390/nano7010001.
Ishizaki, T., Nakano, H., Tajima, S., & Takahashi, N. (2016). Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles. Nanomaterials (Basel, Switzerland), 7(1), . https://doi.org/10.3390/nano7010001
Ishizaki, Toshitaka, et al. "Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles." Nanomaterials (Basel, Switzerland) vol. 7,1 (2016). doi: https://doi.org/10.3390/nano7010001
Ishizaki T, Nakano H, Tajima S, Takahashi N. Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles. Nanomaterials (Basel). 2016 Dec 23;7(1). doi: 10.3390/nano7010001. PMID: 28336835; PMCID: PMC5295191.
Copy Download .nbib Format: NLM
Share it on

Nanomaterials (Basel). 2016 Dec 23;7(1). doi: 10.3390/nano7010001.

Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles.

Nanomaterials (Basel, Switzerland)

Toshitaka Ishizaki, Hideyuki Nakano, Shin Tajima, Naoko Takahashi

Affiliations

  1. Toyota Central R&D Labs., Inc., 41-1 Nagakute, Aichi 480-1192, Japan. [email protected].
  2. Toyota Central R&D Labs., Inc., 41-1 Nagakute, Aichi 480-1192, Japan. [email protected].
  3. Toyota Central R&D Labs., Inc., 41-1 Nagakute, Aichi 480-1192, Japan. [email protected].
  4. Toyota Central R&D Labs., Inc., 41-1 Nagakute, Aichi 480-1192, Japan. [email protected].

PMID: 28336835 PMCID: PMC5295191 DOI: 10.3390/nano7010001

Abstract

A thin, insulating layer with high electrical resistivity is vital to achieving high performance of powder magnetic cores. Using layer-by-layer deposition of silica nanosheets or colloidal silica over insulating layers composed of strontium phosphate and boron oxide, we succeeded in fabricating insulating layers with high electrical resistivity on iron powder particles, which were subsequently used to prepare toroidal cores. The compact density of these cores decreased after coating with colloidal silica due to the substantial increase in the volume, causing the magnetic flux density to deteriorate. Coating with silica nanosheets, on the other hand, resulted in a higher electrical resistivity and a good balance between high magnetic flux density and low iron loss due to the thinner silica layers. Transmission electron microscopy images showed that the thickness of the colloidal silica coating was about 700 nm, while that of the silica nanosheet coating was 30 nm. There was one drawback to using silica nanosheets, namely a deterioration in the core mechanical strength. Nevertheless, the silica nanosheet coating resulted in nanoscale-thick silica layers that are favorable for enhancing the electrical resistivity.

Keywords: electrical resistivity; insulating layer; iron loss; magnetic flux density; powder magnetic core; silica nanosheet

References

  1. Chem Commun (Camb). 2005 Jun 21;(23):2945-7 - PubMed
  2. Angew Chem Int Ed Engl. 2006 Sep 25;45(38):6303-6 - PubMed
  3. Langmuir. 2015 Mar 10;31(9):2879-84 - PubMed

Publication Types