Tdk Corporation

Osamu Kido

Makoto Endo

Hirobumi Tanaka

Jun Sato

Takashi Kojima

Yusuke Sato

Hiroyuki Ono

Akihiro Harada

Tomofumi Kuroda

Taisuke Masuko

Masahito Koeda

Satoko Ueda

Tomokazu Ishikura

Tomoya Shibasaki

A compact laminated ceramic electronic component having superior moisture resistance and electrical properties is provided. A laminated ceramic electronic componentincludes an inner layer portion that contains a plurality of dielectric layersand internal electrode layerscomprising Ni as a main component that are laminated alternately, and a pair of dielectric outer layer portionswhich sandwich the inner layer portions. And Ni particles are segregated in the dielectric outer layer portions And the amount of Ni particles existing in the dielectric layersis smaller than that in the dielectric outer layer portions

Laminated ceramic electronic parts

A dielectric ceramic composition comprising a main component and at least one or more subcomponent elements has a dielectric particle and a grain boundary. The dielectric particle has a main component phase substantially composed of the main component, and a diffusive phase around the main component phase where at least one selected from the subcomponent elements is diffused, a local minimal value of Cs is located at an outside edge side with respect to a position of the local maximum value of Cs, and Cs is increased from a position of the local minimal value of Cs toward the outside edge, when the dielectric particle is cut on an arbitrary cutting plane including the main component phase, and Cs is defined as a concentration of one or more elements selected from the subcomponent elements in an arbitrary position in the dielectric particle.

Dielectric ceramic composition

A dielectric ceramic composition includes BaTiOas a main component; as subcomponents, with respect to 100 moles of BaTiO, 0.9 to 2.0 moles of an oxide of RA in terms of RAO, where RA is at least one selected from Dy, Gd and Tb; 0.3 to 2.0 moles of an oxide of RB in terms of RBO, where RB is at least one selected from Ho and Y; 0.75 to 2.5 moles of an oxide of Yb in terms of YbO; and 0.5 to 2.0 moles of an oxide of Mg in terms of Mg. when contents of oxide of RA, oxide of RB and oxide of Yb with respect to 100 moles of BaTiOare defined as '&#x3b1;', '&#x3b2;' and &#x201c;&#x3b3;&#x201d;, respectively, &#x201c;&#x3b1;&#x201d;, &#x201c;&#x3b2;&#x201d; and &#x201c;&#x3b3;&#x201d; satisfy relations of 0.66&#x2266;(&#x3b1;/&#x3b2;)&#x2266;3.0 and 0.85&#x2266;(&#x3b1;+&#x3b2;)/&#x3b3;&#x2266;2.4. According to the present invention, a dielectric ceramic composition having good properties can be provided.

Dielectric ceramic composition and ceramic electronic component

The present invention provides a powder magnetic core low in the loss and high in the saturation magnetic flux density and a method for manufacturing the same. More specifically, the present invention provides a powder magnetic core that comprises a soft magnetic metal powder having an average particle size (D50) of 0.5 to 5 &#x3bc;m, a half width of diffraction peak in a &#x3c;110&#x3e; direction of &#x3b1;-Fe as measured by X-ray powder diffraction of 0.2 to 5.0&#xb0;, and an Fe content of 97.0% by mass or more, the core having an oxygen content of 2.0% by mass or more.

Powder magnetic core and method for manufacturing the same

Growing community of inventors

Tokyo, Japan

Osamu Kido