Nd_2Fe_<14>BとSrO・6Fe_2O_3からなる複合プラスチックボンド磁石における磁化特性の正の温度係数

概要

論文の詳細を見る
rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: isVersionOf: http://ci.nii.ac.jp/naid/110002288165/Plastic-bonded magnets were prepared by magnetic field injection molding, using a mixture of Nd_2Fe_<14>B and SrO・6Fe_2O_3 pellets. The magnetic characteristics and temperature coefficients of these magnets were investigated. The hysteresis loop for the temperature change of the plastic-bonded magnet was measured. An important phenomenon was revealed pertaining to the physical properties of the magnetic material : under ordinary temperature conditions, the magnetic temperature coefficient of magnetic flux density and coercive force for the Nd_2Fe_<14>B and SrO・6Fe_2O_3 plastic-bonded magnet for the case of adequate SrO・6Fe_2O_3 content attained a posilive value at a SrO・6Fe_20_3 content ranging from about 20 to 60 mass% at 297-323 K, and from around 18 to 43 mass% at 323-373 K. Moreover, it was proven that the temperature coefficients of the magnetic flux density at operating points of permeance coefficients P_C(B/H)=1 and 2 could be controlled from 0 to 0.22 %/K at 297-323 K and from 0 to 0.1 %/K at 323-373 K, respectively.
社団法人日本セラミックス協会の論文
2004-02-01