Tdk Corporation

Tomy Company, Ltd.

Tokyo Unique Co., Ltd.

Junichi Nagaoka

Yoshihiko Minachi

Takahiro Mori

Hiroyuki Morita

Taku Murase

Noboru Ito

Shunsuke Kurasawa

Takeshi Masuda

Shogo Muroya

Hidenobu Umeda

Kenya Takagawa

Kunio Ohno

Shigeki Yanagida

Jo Sato

Masashi Ohmura

Takuma Abe

Syunsuke Kurasawa

A ferrite sinter magnet has a ferrite phase having a magnetoplumbite-type crystal structure, and contains at least a metal element A, a metal element R, Fe, Co, Zn, and B. The element A is at least one kind of element selected from the group consisting of Sr, Ba, Ca, and Pb, and essentially includes Ca. the element R is at least one kind selected from the group consisting of Bi and rare-earth elements including Y, and essentially includes La. Atomic ratios of the metal elements satisfy the following Expressions (1) to (5),ARFeCoZn  (1)0.40≤≤0.70  (2)8.20≤≤9.34  (3)0.05≤≤0.50  (4)0<≤0.20  (5) The content of Si is 0 to 0.60% by mass in terms of SiO, and the content of B is 0.1-0.70% by mass in terms of BO.

Ferrite sintered magnet, ferrite particles, bonded magnet, and rotating electrical machine

An object of the present invention is to provide a ferrite magnetic material which can provide a permanent magnet retaining high Br and HcJ as well as having high Hk/HcJ. The ferrite magnetic material according to a preferred embodiment is a ferrite magnetic material formed of hard ferrite, wherein a P content in terms of POis 0.001% by mass or more.

Ferrite magnetic material

An object of the present invention is to provide a ferrite magnetic material capable of providing a permanent magnet in which high Br and HcJ are kept, and which has a high Hk/HcJ. A ferrite magnetic material in accordance with a preferred embodiment has a ferrite phase having a hexagonal structure and has a main composition represented by CaRSrBaFeMO(R is at least one element of rare earth elements (including Y) essentially including La, and Bi, and M is at least one element of Co, Mn, Mg, Ni, Cu, and Zn essentially including Co), where 0.25&#x3c;w&#x3c;0.65, 0.01&#x3c;x&#x3c;0.45, 0.0002&#x3c;y&#x3c;0.011, y&#x3c;x, 8&#x3c;z&#x3c;11, 1.0&#x3c;w/m&#x3c;2.5, and 0.017&#x3c;m/z&#x3c;0.065 are satisfied. The total amount of a Si component is 0.1 to 3 mass % based on the amount of the main composition, and respective elements satisfy the relationship of 1.5&#x2266;[(Ca+R+Sr+Ba)&#x2212;(Fe+M)/12]/Si&#x2266;3.5.

A toy vehicle, a toy assembly device and a related method includes a toy body having a plurality of component members, and a plurality of support frame members respectively supporting the component members. The component members and the support frame members have respective engaging portions that can engage and disengage in a horizontal direction. Each of the support frame members has a fitting part provided thereon for connecting the support frame members to one another. Each of the component members has a fitting portion provided thereon for connecting the components members to one another. When the support frame members, each with a component member supported thereon, are connected to one another through the fitting parts, the component members are connected to one another by the fitting portions to form the toy body, so that the toy body can engage with or disengage from the support frame members connected to one another.

Toy vehicle, toy assembly device and method for assembling toy

W-type ferrite has improved magnetic properties, in particular, coercive force. A high coercive force (HcJ) and a high residual magnetic flux density (Br) can be simultaneously attained by a ferrite magnetic material comprising an oxide having a composition wherein metal elements Sr, Ba and Fe in total have a composition ratio represented by the formula SrBaFeFein which 0.03 &#x2266;x&#x2266;0.80, 1.1&#x2266;a&#x2266;2.4, and 12.3&#x2266;b&#x2266;16.1. The ferrite magnetic material can form any of a ferrite sintered magnet, a ferrite magnet powder, a bonded magnet as a ferrite magnet powder dispersed in a resin, and a magnetic recording medium as a film-type magnetic phase. As for the ferrite sintered magnet, there can be attained a fine sintered structure that has a mean grain size of 0.6 &#x3bc;m or less.

Ferrite magnetic material and ferrite sintered magnet

Toy vehicle

A ferrite magnetic material comprising a main phase of W-type is provided which has magnetic properties improved through the optimization of additives. The ferrite magnetic material comprises a main constituent having a compound represented by composition formula AFeFeO(wherein A comprises at least one element selected from Sr, Ba and Pb; 1.5&#x2266;a&#x2266;2.1; and 12.9&#x2266;b&#x2266;16.3), a first additive containing a Ca constituent (0.3 to 3.0 wt % in terms of CaCO) and/or a Si constituent (0.2 to 1.4 wt % in terms of SiO), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt % in terms of AlO), a W constituent (0.01 to 0.6 wt % in terms of WO), a Ce constituent (0.001 to 0.6 wt % in terms of CeO), a Mo constituent (0.001 to 0.16 wt % in terms of MoO), and a Ga constituent (0.001 to 15 wt % in terms of GaO).

The present invention provides a ferrite magnet material comprising, as a main phase, a ferrite having a hexagonal structure, the main phase containing A, La, R, Fe and Co, wherein A is at least one element selected from Sr, Ba and Pb, R is Pr and/or Nd, and the proportions of the total metal elements A, La, R, Fe and Co in the main phase are respectively A: 1 to 13 atomic %, La: 0.003 to 10 atomic %, R: 0 to 10 atomic % (excluding 0) Fe: 80 to 95 atomic % and Co: 0.05 to 5 atomic % based on the total amounts of metal elements. The residual magnetic flux density Br and coercive force HcJ can be improved without increasing the content of Co by incorporating Pr and/or Nd along with La and Co in the ferrite magnet material.

Growing community of inventors

Tokyo, Japan

Junichi Nagaoka