DIAMOND SINTER WITH SATISFACTORY ELECTRICAL CONDUCTIVITY AND PROCESS FOR PRODUCING THE SAME

WIPO Patent Application WO/2008/053796

A1

A diamond sinter which has satisfactory electrical conductivity and is comparable in hardness, thermal conductivity, heat resistance, chemical stability, etc. to natural diamond; and a process for producing the sinter. A raw-material powder is prepared which comprises 90-99.9 wt.% boron-doped diamond powder having a dopant boron amount of 1-10 wt.% and, as a binding phase component, 0.1-10 wt.% carbonate powder comprising one or more of the carbonates of magnesium, calcium, strontium, and barium and composite carbonates of two or more of these. The raw-material powder is sintered under ultrahigh-pressure high-temperature conditions to melt the binding phase component and cause it to infiltrate into and fill the interstices among particles of the boron-doped diamond powder. Thus, a boron-doped diamond sinter having satisfactory electrical conductivity and heat resistance is obtained.

TAJIMA, Itsuro (Central Reserch Institute 1002-14, Mukaiyam, Naka-shi Ibaraki 02, 3110102, JP)
田島 逸郎 (〒02 茨城県那珂市向山１００２番地１４ 三菱マテリアル株式会社 中央研究所内 Ibaraki, 3110102, JP)
WARDOYO, Akhmadi Eko (Central Reserch Institute 1002-14, Mukaiyam, Naka-shi Ibaraki 02, 3110102, JP)

JP2007/070888

May 08, 2008

October 26, 2007

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MITSUBISHI MATERIALS CORPORATION (5-1 Otemachi 1-chome, Chiyoda-ku Tokyo, 17, 1008117, JP)
三菱マテリアル株式会社 (〒17 東京都千代田区大手町一丁目５番１号 Tokyo, 1008117, JP)
TAJIMA, Itsuro (Central Reserch Institute 1002-14, Mukaiyam, Naka-shi Ibaraki 02, 3110102, JP)
田島 逸郎 (〒02 茨城県那珂市向山１００２番地１４ 三菱マテリアル株式会社 中央研究所内 Ibaraki, 3110102, JP)

C04B35/52

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