Riken Corporation

Fuji Polymer Industries Co., Ltd.

Kimitoshi Kono

Seiji Niitaka

Hidenori Takagi

Masakazu Hattori

Tomoki Matsumura

The heat storage material of the present invention is a heat storage material comprising a substance that induces an electronic phase transition, wherein the electronic phase transition is a phase transition of multiple degrees (associated) with freedom including a spin degree of freedom and an orbital degree of freedom, which are internal degrees of freedom of electrons, and the substance is VCrO(0&#x3c;X&#x2266;0.23).

Heat storage material

A heat storage composition () of the present invention includes a matrix resin () and heat storage inorganic particles (). The heat storage inorganic particles () are composed of a material that undergoes an electronic phase transition and has a latent heat of 1 J/cc or more for the electronic phase transition. The amount of the heat storage inorganic particles is 10 to 2000 parts by weight with respect to 100 parts by weight of the matrix resin. The heat conductivity of the heat storage composition is 0.3 W/m&#xb7;K or more. The heat storage composition may further include heat conductive particles (). The heat storage inorganic particles are preferably metal oxide particles containing vanadium as the main metal component. The heat storage composition has high heat storage properties and high heat conduction properties, and is used as a heat storage silicone material provided between a heat generating component and a case. Since heat from the heat generating component is temporarily stored in the heat storage composition so that the heat conduction is delayed, the heat is diffused during the delay to eliminate partial heating, thereby resulting in uniform heat dissipation.

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Saitama, Japan

Kimitoshi Kono