Oulun Yliopisto

Jari Juuti

Heli Jantunen

Jari Hannu

Mikko Nelo

Tuomo Siponkoski

Hanna Kähäri

A process for manufacturing ceramic-metal composite material, comprises dissolving ceramic powder into water to obtain an aqueous solution of ceramic; mixing metal powder having a multimodal particle size where largest particle size is one fourth of the minimum dimension of a device, with the aqueous solution of ceramic to obtain a powder containing ceramic precipitated on the surface of metal particles; mixing the powder containing ceramic precipitated on the surface of the metal particles, with ceramic powder having a particle size below 50 μm, to obtain a powder mixture; adding saturated aqueous solution of ceramic to the powder mixture to obtain an aqueous composition containing ceramic and metal; compressing the aqueous composition to form a disc of ceramic-metal composite material containing ceramic and metal; and removing water from the ceramic-metal composite material; wherein ceramic content of the disc is 10 vol-% to 35 vol-%. Alternatively, ceramic-ceramic composite material may be manufactured.

Ceramic composite material

A process for manufacturing ceramic-metal composite material, comprises dissolving ceramic powder into water to obtain an aqueous solution of ceramic; mixing metal powder having a multimodal particle size where largest particle size is one fourth of the minimum dimension of a device, with the aqueous solution of ceramic to obtain a powder containing ceramic precipitated on the surface of metal particles; mixing the powder containing ceramic precipitated on the surface of the metal particles, with ceramic powder having a particle size below 50&#x3bc;&#x3b9;&#x3c4;&#x3b9;, to obtain a powder mixture; adding saturated aqueous solution of ceramic to the powder mixture to obtain an aqueous composition containing ceramic and metal; compressing the aqueous composition to form a disc of ceramic-metal composite material containing ceramic and metal; and removing water from the ceramic-metal composite material; wherein ceramic content of the disc is 10 vol-% to 35 vol-%. Alternatively, ceramic-ceramic composite material may be manufactured.

A heat resistant electronic component is disclosed, comprising an electronic component covered by a layer of ceramic thermal insulation material containing lithium molybdate LiMoO. A process for manufacturing the heat resistant electronic component comprises obtaining ceramic thermal insulation material containing lithium molybdate LiMoOin a mouldable form, optionally mixing the ceramic thermal insulation material with at least one additive, covering an electronic component with the material, shaping the material covering the electronic component into a desired form, and drying the desired form at a temperature of from 20&#xb0; C. to 120&#xb0; C.

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Oulu, Finland

Jari Juuti