Sumitomo Metal Industries, Inc.

Osaka Titanium Technologies Co., Ltd.

Shinji Shimosaki

Kazuhiko Kusunoki

Kazuhito Kamei

Nobuyoshi Yashiro

Shingo Kizaki

Akihiro Yauchi

Kouji Yasuda

A negative electrode material powder for a lithium ion secondary battery having a conductive carbon film on the surface of a lower-silicon-oxide powder; wherein a specific surface area in BET measurement ranges from more than 0.3 m/g to 40 m/g, and no SiC peak appears at 2&#x3b8;=35.6&#xb0;&#xb1;0.01&#xb0; or the half-value width of the appeared peak is 2&#xb0; or more in XRD measurement using CuKrays. The proportion of said carbon film preferably ranges from 0.2% to 2.5% by mass. Said powder preferably has 100000 &#x3a9;cm or less of specific resistance. In XRD, P2/P1&#x3c;0.01 is preferably satisfied between the highest value P1 of halo of SiOand a value P2 of the strongest linear peak of Si (111) above the halo. Accordingly, said powder can be used in the secondary battery with a large discharge capacity and a preferable cycle characteristics for practical use.

Negative electrode material powder for lithium ion secondary battery, negative electrode for lithium ion secondary battery, negative electrode for capacitor, lithium ion secondary battery, and capacitor

A method capable of stably manufacturing a SiC single crystal in the form of a thin film or a bulk crystal having a low carrier density of at most 5&#xd7;10/cmand preferably less than 1&#xd7;10/cmand which is suitable for use in various devices by liquid phase growth using a SiC solution in which the solvent is a melt of a Si alloy employs a Si alloy having a composition which is expressed by SiCrTiwherein x, y, and z (each in atomic percent) satisfy0.50&#x3c;x&#x3c;0.68, 0.08&#x3c;y&#x3c;0.35, and 0.08&#x3c;z&#x3c;0.35, or &#x2003;&#x2003;(1)0.40&#x3c;x&#x2266;0.50, 0.15&#x3c;y&#x3c;0.40, and 0.15&#x3c;z&#x3c;0.35.&#x2003;&#x2003;(2)x, y, and z preferably satisfy 0.53&#x3c;x&#x3c;0.65, 0.1&#x3c;y&#x3c;0.3, and 0.1&#x3c;z&#x3c;0.3.

Method of manufacturing a silicon carbide single crystal

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Amagasaki, Japan

Shinji Shimosaki